JPS58161166A - Tape recorder - Google Patents

Abstract

PURPOSE:To repeat reproduction automatically with a shortest blank time of reproduction, by detecting automatically the end position of the last music and the start position of the first music by a non-recording part detecting circuit, and executing the reproduction between them. CONSTITUTION:When a tape starts running at a constant speed, an output waveform of a comparing circuit, a collector waveform of a transistor, and a waveform of an output terminal of a non-recording part detecting circuit become as shown by E, F and G, respectively, and it is detected that reproduction of the last music ends. In this case, the mechanism becomes a review state. In this case, the output waveform of the comparing circuit, the collector waveform of the transistor, and the waveform of the output terminal of the comparator of the non-recording part detecting circuit become as shown by E, D and C, respectively, and the vicinity of the head of the first music is detected. Also in this case, a count value of an adding and substracting counter is cleared and also the mechanism becomes a reproducing state. Subsequently, when it is detected again that reproduction of the last music ends the tape is rewound to a count value ''0'', and the mechanism becomes a rewinding state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape recorder having a repeat playback function.

In the case of cassette tapes, the repeat playback function added to conventional tape recorders detects the beginning and end of the tape and repeatedly plays between them.
Detect the position of "00G" of Kakunta's Kakunta value,
Reproduction was performed repeatedly between that position and the beginning or end of the tape. However, at the beginning and end of a cassette tape, there is a leader tape section of several seconds to over ten seconds, and most tapes other than reprinted recorded tapes have an unrecorded section of about 1 to 2 minutes near the end of the tape. However, during repeated playback, there would be blank time other than the tape rewind time, which would disturb the listener's mood.

Also, if the tape has only been recorded halfway, the user can use KFi to set the count value corresponding to that position in roooJKL and repeat playback from the beginning of the tape. [000J:
(L... There was also the hassle of having to rewind.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tape recorder having a repeat playback function that is easy to operate and wastes less time.

An embodiment of this invention is shown in Figure 1 and Figure 2.

In FIG. 1, it is a magnetic tape on which IFi music signals and the like are recorded, and a reproduction head 2 and a reproduction equalizer deamp 3 provide a KgA output during reproduction and during reproduction. This signal Fi4 is sent to a level comparison circuit, and if there is no signal during playback and at the time of Rev1, a signal at rHJ level is output. However, during playback and during review, the signal output level of the playback equalizer amplifier 3 is ^^, so the comparison reference level is switched by the signal supplied to the input terminal 4. 5#i is a non-recorded portion detection circuit, which has an internal detection time switching circuit, and switches the time according to the signal supplied to the input terminal 5iK. Also, from the output end 6b,
Control pulses are output at each set time constant K16 during playback and review. 7 is a mechanism block, which is controlled by a control circuit 6. Reference numeral 14 denotes a ring magnet attached to the reel stand. Changes in its magnetic field are detected by a Hall element 15, and the rotational speed of the reel stand is sent to the addition/subtraction unit 16. This addition/subtraction kakunta 16 is the control time %
It is configured so that addition or subtraction is performed using finger 6 ◆6C, and the count value is displayed on display section 21. 8#i playback command switch and 9Fi rewinding command switch.If both are pressed at the same time, the replay operation will be sudden. 1eFi repeat play finger switch
When this switch is closed, only the jar is configured to repeatedly play. When this switch 17 is pressed, the count value of the addition/subtraction kakunta 16 is cleared to "0OOJK." 11 is a control circuit that outputs the output 5b of the non-silver note detection circuit 5 and the control circuit 6. The output end 11 is at the rLJ level for a certain period of time when both outputs 6b and 6b are at the Kr1lJ level.

11b, and these output terminals 11a and llb are connected via diodes 12 and 13 to a regeneration measure input terminal and a rewind command input terminal. That is, during playback, it is detected that the signal recorded on the tape is no longer present, and a review operation is started.

However, the output end 11m is
Because it is configured to be at the "rL" level only once,
Only at the beginning of the repeated motion is a rebuffing motion, and thereafter is a rewinding motion. Next, when the vicinity of the beginning of the first song recorded on the tape is detected by the Levi's operation, a signal at rLJ level is output for a certain period of time from the output terminal d of the control circuit 6, and the addition/subtraction kakunta 1 is counted. The value is “0OO”
JK cleared. Then, the value l"0OOJ is stored from the beginning of the control circuit 111Kd, and when this value and the value of the addition/subtraction kakunta 16 match, a signal of rHJ level is supplied to the control circuit 111KN. The output terminal of the control circuit 6・
A signal having a "wing" level is output at the time of unwinding, and is supplied to the control circuit 111. The control circuit 19 outputs a signal at the rLJ level when both of the input signals are at the 1'' level, and as a result, the playback input terminal becomes a diode! ξ and K are brought together to the rLJ level via O, and a regeneration operation begins. Note that the output terminal 64 of the control cycle s- is output only when a position slightly in front of the head of the first - is detected during the rebi-breath motion. In other words, this is only the first time of the repeated playback operation.

FIG. 2 is a specific circuit diagram of the comparison II4 and the non-silver note part detection circuit 5. In the same figure, when the input terminal abKlj is provided, the attenuation composed of resistors R, R2, and R3 is applied. The circuit brings the signal to the proper level. Reference numeral 25 denotes a switch that is opened during playback and closed during playback, and in either case the level is appropriate for detecting the signal. and,
This signal is fed to comparator@22. This comparison @22K
There is an Fi reference voltage 27, and this value is normally set to a value that is somewhat higher than the noise level when an unrecorded tape is played back or played back. That is, this is to set the output of the 1 comparator 22 to the "H" level when a reproduction signal such as a normal music signal is input. This output is supplied to the transistor 230 through a resistor, and there is a time constant circuit having a collector KH resistor R4, a capacitor VC, and C2. Here, the changeover switch 24 is closed during playback, and is temporarily set to KIi@ for review. In other words, when there is no signal during reproduction, the transistor 23ti turns from on to off @Kft-
In order to conduct
(determined by R6), the output changes from 5bFirLJ to rHJK. In order to determine that this is the end of the last song during playback, rather than the normal interval between songs, Kij is true if it detects that there is no signal for about 10 seconds after the playback signal of that song disappears. Therefore, K is set to the reference level of comparison $26 by '/2 VCC*, that is, assuming that R5 and R6 have the same value, it is necessary that the relationship shown below holds between resistor R4 and consonators C1 and C2.

10-◆0.7XR, (C1+C2) ... (1
) Next, in order to determine that it is the beginning of the first song at the beginning of the first song, KFi only needs to detect that there is no signal for a period of time corresponding to about 10 seconds or more in playback time. Here, if the tape speed during review is set to 20 times that during playback, the following relational expression holds true.

0.7XR4・C1 in 10M/zo (2) Using K like this (1) and (2), R4
゜It is possible to determine the values of C1 and C2. Here, the value of R4 can be set to any value within a range where errors are unlikely to occur due to the circuit configuration.

The repetitive playback operation of this tape recorder will be explained below with reference to FIG.

First, when the repeat playback finger switch IQ is turned on and then the playback command switch 8 is turned on, the tape starts running at a constant speed, and the output waveform of the comparator circuit 4 and the transistor 23
The collector waveform of , and the waveform of the output terminal 5b of the unrelated sound part detection circuit are as shown in ('') e in Fig. 113 for the above-mentioned reasons.
('l t import) K will be shown.

In other words, it can detect when the last song has finished playing, and this time instead of between normal songs.

For the reasons mentioned above, the mechanism becomes Levy-like. At this time, the output waveform of the comparison circuit 4, the collector waveform of the transistor 23, and the output terminal 5 of the comparison s26 of the unrelated tone part detection circuit 5
The waveforms of b are @), (D), and (D) in Figure 3, respectively.
(C) It will look like K. That is, the vicinity of the beginning of the first song can finally be detected, and at this time, for the reason mentioned above, when the kakunt value of the addition/subtraction kakunta 16 is cleared, the mechanism enters the playback state. Next, when it is detected that the reproduction of the last song has ended again, K11t% enters a state of full play for the reasons mentioned above.

In this manner, by turning on the % repeat playback command switch 10 and turning on the playback finger switch 8, it is possible to automatically perform a repeat playback operation with a short playback blank time.

Because of KIIHI in this way, a pot-like effect can be obtained.

(1) When repeating playback, the end position of the last song and the beginning position of the first song are automatically detected and playback is performed between them, eliminating the need to locate the beginning of a song or clear the cucumber value. , very easy to use.

(2) Lebi-o - Since the movement is only the first time,
Less head wear and tape damage.

(3) The playback blank time is automatically minimized so that the listener's mood is not affected.

(4) The tape count value is cleared to ``0OOJK'' near the beginning of the first song recorded on the tape.
When first recording the signal on the tape, if you set the beginning of the first song to [0004 and write the kakunt value of the multi-track recording start on the index label, etc., once you have repeatedly played back the tape, Since the kakunt value at the start of recording for each stroke is almost equal to the index label value, 121
I'm excited to find the beginning of the song I want to play.

(5) With repeated playback operations, from the rewind state to the playback state 1
When shifting to 1, it is detected and compared that the kakuto value has become "000" K, so in a device with a conventional repeat playback function, the kakuto value is ro when in the rewind state.
If the device has a function that makes the playback state more rapid when ooJK occurs, the detection and comparison circuit will meet at #-, so the above-mentioned repeat playback function can be added rationally.

As described above, (1) the tape recorder of the present invention includes a reproducing means for reproducing the tape, a rewinding means for driving the tape with a measuring tape, and a signal recording end position of the tape is detected by comparing the reproducing output with a predetermined reference voltage. Signal recording end position detection means;
a tape measure command means that receives the detection output of the signal recording end position detecting means and gives a winding command to the rewinding means so that at least the first rewinding is a Levier winding trap; a signal recording start position detecting means for detecting the signal recording start position of the signal recording start position, and when the tape is tape-measured to the detection position by the recording start position detecting arm of No. a;
a recording/reproducing means; a reproduction command means for giving a reproduction finger;
Since the tape is automatically repeatedly played back between the signal recording start position and the signal recording end position, it is easy to use because the operation is similar to Dutch studies, and the repeat playback operation is performed with less waste of time. It has good effects.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a partial detailed circuit diagram thereof, and FIG. 3 is an explanatory diagram of its operation. DESCRIPTION OF SYMBOLS 1... Magnetic tape, 2... Playback head, 3... Playback equalizer amplifier, 4... Comparison circuit, 5... Unrelated tone part detection circuit, 6... Control circuit, 7. ... Mechanism, 8... Play command switch, 9... Rewind command switch, 10... Repeat play command switch, ll
... control circuit, 14... ring magnet), 15.
...Hall element, 16...Addition and subtraction kakunta, 17.
... Cacunto value clear switch, 18 ... Salmon value comparison circuit, 19 ... Control circuit, 21 ... Display section

Claims (2)

[Claims] (1) A reproducing means for driving the reproduction of the tape; a rewinding means for rewinding the tape; and a signal recording end position detecting means for detecting the signal recording end position of the tape by comparing the reproduced output sound with a predetermined reference voltage; rewinding command means for receiving the detection output of the 8% recording end position detecting means and giving a rewinding command to the rewinding means so that at least the first rewinding is a revier rewind; Signal recording start position detection means for detecting the signal recording start position of the tape by comparing the signal recording start position of the tape;
! #! A tape recorder comprising a reproduction command means for giving a reproduction command to the recording reproduction means, and configured to automatically repeatedly reproduce the tape between the signal recording start position and the signal recording end position. (2) 1t! The recorder commanding means instructs the rewinding means to perform a levee*trap in response to the detection output of the signal recording end position detection means during the first reproduction, and receives the detection output from the second and subsequent reproductions to instruct the rewinding means to perform a levee*trap. The reproduction commanding means commands an addition/subtraction kakunta which stops at the 9th rewind of the tape and performs an addition/subtraction operation, and receives a detection output of the signal recording start position detection means and instructs the addition/subtraction kakunta. A kakunta clear section that clears the kakunto value to zero, and a regeneration finger for the regeneration accident by moving it to the kakunto basket-V mouth of the addition and subtraction kakunta★
The tape recorder according to claim ms (1), which comprises a finger ★ portion that provides the following.