JPH0223930B2 - - 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 playing back 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. By external operation, a numerical value corresponding to the displayed value of this electronic counter can be arbitrarily set and stored, and when the displayed value of the electronic counter matches the stored value and when it reaches zero, a magnetic By reversing the running direction of the tape, reciprocating playback is performed in any preset section of the magnetic tape according to the reverse mode selected by the reverse selector during playback, and 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.

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 generation circuit 8 amplifies and waveforms the signal from the tape running detector 7, generates a tape pulse P _T with a frequency proportional to the running speed of the tape 2, and inputs it to an electronic counter 9 as a tape counter. do.

The electronic counter 9 inputs and counts the tape pulse P _T from the pulse generating circuit into the reversible counter 10, and displays the running amount or running time (running time in this embodiment) of the tape in a 4-digit 7-segment digital display. The information is displayed on a display unit 11 using a device.

In this embodiment, the reversible counter 10 normally receives tape pulses regardless of the running direction of the tape.
It counts up P _T , continuously displays the recording/playback time in real time, and counts down only when a down signal S _D is input from a microprocessor 12, which will be described later.

The microprocessor 12 performs a reversal control 1 that controls the rotation direction of the capstan motor, switches the head, etc.
3, the main body 1 has functions for controlling recording/playback, fast forwarding, rewinding, pausing, switching direction of travel, stopping, various displays, etc. of the main body 1.

Further, this microprocessor 12 sets an arbitrary numerical value corresponding to the display value of the electronic counter 9 using input signals from a memory switch 20, a program switch 21, and a set switch 22 as data input means by external operations, and performs electronic processing. The displayed value is displayed on the display unit 11 of the counter 9, and the displayed value is stored in a RAM (random access memory) that is a storage device.
16 to be memorized.

Then, the current mode is determined to be playback or recording, and depending on the result and the selection state of the reverse selector 17, which will be described later, during playback, reciprocating 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 tape counter display value based on the count value of the reversible counter 10 is compared with the stored value of the RAM 16 or 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 change the running direction of the tape 2. It also has the function of reversing the magnetic head and switching the magnetic head accordingly.

When the tape counter display matches the stored value (memory content) of the RAM 16, a down signal is output to the reversible counter 10, and the tape pulse P _T is counted down (subtracted) until the count value reaches "0".

17 is the main unit 1 to select reverse mode.
A reverse selector for selecting non-reverse, one-time reverse, or two or more reverses is provided on the operating section of the controller, and includes a non-reverse switch 17a, a one-time reverse switch 17b, and a permanent reverse switch 17c.
Consisting of

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 section setting and auto-reverse operation according to this embodiment will be explained with reference to FIG. 2.

In Figure 2, the modes are displayed as STOP for stop, PAUSE for pause, FWD for forward playback, REC/FWD for forward recording, REV for reverse playback, and REC/REV for reverse recording.

First, after turning on the power switch, the system is set to stop or pause mode at the starting position of the tape section for which reciprocating recording or repeated reciprocating playback is desired. Then, the user presses the reset switch 18 to reset the display of the electronic counter 9 as a tape counter to "0".

Next, when the memory switch 20 is turned on, the previous memory contents stored in the RAM 16 are displayed on the display section 11 of the electronic counter 9, and if nothing is stored, all digits are displayed as "0".

Then, when the program switch 21 is turned on, the previous memory contents of the RAM 16 are reset, all digits on the display section 11 are displayed as "0", and the fifth digit (time display digit) blinks. Then, when the program switch 21 is turned on again, the fifth digit value increases in sequence as 1, 2, 3, . . . each time the program switch 21 is turned on, and a desired value can be set.

After the desired numerical value is displayed in the 5th digit of the display section 11, when the set switch 22 is turned on, that numerical value is memorized in the RAM 16, and the next 4th digit of the display section 11 is displayed.
The digit (second digit of minute display) flashes.

Therefore, the program switch 21 is turned on a required number of times to set the fourth digit, and the set switch 22 is turned on to store it in the RAM 16.

Similarly, 3rd digit (1st digit of minutes display), 2nd digit (2nd digit of seconds display), 1st digit (1st digit of seconds display)
is also set by the program switch 21, and is stored in the RAM 16 by turning on the set switch 22.

In this way, the required recording or playback time up to the end of the tape section that you want to record and play back is stored in RAM.
16 can be stored in memory.

Therefore, when the memory switch 20 is turned off,
The electronic counter 9 again works as a tape counter and displays the tape running time on the display section 11.
The display at this time is still "0".

Next, when an operation mode is selected using the operation key, forward playback or recording, or reverse playback or recording mode operation is started in the input mode. At this time, the electronic counter 9 functions as a tape counter and displays the tape running time, that is, the recording or playback time.

If you turn on the memory switch 20 in this state,
The memory contents of the RAM 16 can be displayed on the display section 11 again, and when the memory switch 20 is turned off, the display returns to the tape counter display.

When the tape counter display and the RAM memory contents match, if the memory contents are "0" (not stored in memory), the current mode is continued; otherwise, the reverse selector 1
According to the reverse mode selected by 7, the operation is as follows.

(1) When in non-reverse mode, continue in the current mode.

(2) Once in reverse mode, if the current mode is forward playback or recording, it is reversed to reverse playback or recording mode, and if the current mode is reverse playback or recording, it is reversed to forward playback or recording. Then, even if all the digits of the tape counter display become "0" thereafter, the current mode is continued.

(3) When in permanent reverse mode, after switching to playback or recording mode with the tape running direction reversed as in (2), if the tape counter display becomes all digits "0", the current mode will be activated. If it is in recording mode, it continues as it is, and if it is not (in playback mode), it goes into playback mode again with the tape running direction reversed, and the tape counter display becomes "0" at the position that matches the memory contents. The tape running direction is repeatedly reversed depending on the position and continues until the playback mode is stopped.

All these controls are supervised by the microprocessor 12. Further, a reversible counter 10 of the electronic counter 9 and a RAM 16 which is a storage device can be built into the microprocessor 12.

Note that in the above embodiment, the electronic counter as a tape counter displays the recording or playback time, but doing so is convenient for setting the reversal position when the recording or playback time is known in advance. be. However, the present invention is not limited to this, and it goes without saying that the value may be expressed in decimal notation indicating the amount of tape travel.

Further, in the above embodiment, the reversal position is set and memorized in the stop or pause mode, but it can also be done during recording or playback.

As explained above, according to the present invention, an arbitrary section of the magnetic tape is set, and during playback, the round trip playback is performed once or twice according to the reverse mode selected by the reverse selector, and when recording Regardless of the reverse mode selected by the reverse selector, one round trip recording can be automatically performed without waiting time.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of this invention;
The figure is a flowchart showing the interval setting and auto-reverse operation according to the embodiment of FIG. 1 together with an example of display on an electronic counter. 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, 16... RAM (storage device), 17... Reverse selector, 18...
Reset switch, 20...Memory switch, 2
1...Program switch, 22...Set 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. and input means capable of arbitrarily setting a numerical value corresponding to the display value of the electronic counter by external operation; storage means for storing the numerical value set by the input means; and a display value of the electronic counter. reversal control means for reversing the running direction of the tape when the value matches the numerical value stored in the storage means and when it becomes zero; and a reverse selector for selecting a reversal mode of one reversal or two or more reversals. , determining whether the current mode is playback or recording, and determining whether the displayed value of the electronic counter is in an interval between the numerical value stored in the storage means and a zero value, and which is selected by the reverse selector during playback. and means for controlling the reversal control means so that reciprocating playback is performed according to the reverse mode, and one round trip recording is performed during recording regardless of the reverse mode selected by the reverse selector. Auto reverse device.