JPS59193589A - Control circuit of tape recorder - Google Patents

Abstract

PURPOSE:To perform a repeating action by providing the 1st counter circuit which counts the number of no-signal parts existing between signals of a music selection mode and switches the operation to a reproduction mode and the 2nd counter circuit which counts the number of no-signal parts of a reproduction mode and switches the operation to a rewind mode and combining these two counter circuits. CONSTITUTION:When a count number setting switch 44 is closed twice, the set number 2 is set to both the 1st and 2nd counter circuits 15 and 29 respectively. In a reproduction mode a signal of level H is impressed to a control terminal 36 of the circuit 29, and the counter 29 is set in a counting state. However the circuit 15 has no counting action. When the reproduction is over with the 1st music, a signal of level H is output to an output terminal 14 of a n-signal part detecting circuit 13. Then only the circuit 29 has a counting action. When the reproduction is through with the 2nd music, a signal of level H is output again to the circuit 13 and impressed to an input terminal 30 of the circuit 29. The signal of level H is supplied to a rewinding input terminal of a control circuit 5 through the 2nd selection switch 42. Then the reproduction mode is switched to a selection mode by a rewinding action.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a tape recorder, and more particularly to a control circuit for switching operations of a tape recorder.

(b) Prior art Recently, a so-called song selection device has been equipped that detects a no-signal portion between signals of music recorded on a magnetic tape in the fast forward or rewind state and automatically switches the tape recorder to the playback state. Tape recorders have become widespread, and some of these tape recorders are designed to allow selection of not only one song but several preset songs.

In addition, tape recorders have been commercialized that have a function called repeat, which plays a song once played again, but the repeat operation of such tape recorders is such that when the magnetic tape reaches the end, it is rewound to the beginning and the playback operation is resumed. The playback operation may be repeated for only one song.

(C) Object of the Invention The present invention provides a control circuit that can repeatedly reproduce not only one song but an arbitrary number of songs.

B) Structure of the Invention The present invention provides a first system which, when the number of non-signal areas between the signals during music selection operation is counted, outputs a switching signal when the counted number reaches a set number and switches the tape recorder to the playback state.
A counter circuit is provided, and a second counter circuit is provided which counts the number of non-signal areas during playback operation and outputs a switching signal to switch the tape recorder to the rewinding state when the counted number reaches a set number. The repeat operation is performed by a combination of the following.

(E) Embodiment The illustrated circuit is an embodiment of the control circuit of the present invention. In the figure, (1), (2), (3), and (4) are operation buttons for stop, fast forward, rewind, and playback, and (5) outputs a signal according to the operation of each of the operation buttons. An output terminal (6) that outputs an H (high) level signal in response to the operation of the fast-forward operation button (2), the rewind operation button (3), and the playback operation button (4). , (7) and (8). (9) is the output terminal (6) of the control circuit (5)
, (7) and (8) are applied, and the operation switching circuit operates to switch the tape recorder to each operating state. Reference numeral 00) is a reproducing magnetic head which not only performs normal reproducing operations but also comes into contact with the magnetic tape during song selection operations to reproduce signals recorded on the magnetic tape. aυ is the magnetic head for reproduction 00)
θ2 is an output terminal of the amplifier circuit 0υ.

0 (to) is a no-signal that outputs a signal of level I to the output terminal side every time the output signal of the amplifier circuit αυ is applied and a no-signal part between the signals recorded on the magnetic tape is detected. This is a part detection circuit. 0 is a first counter circuit that counts the number of H level signals output to the no-signal detection circuit (output terminal 04 of +31), and an input to which the output signal from the output terminal (+41) is applied. Terminal (
Io, a setting terminal (17) for setting the count number,
A first terminal (08), a second terminal (1'l), a third terminal (20), which sequentially output an L (low) level signal each time an H level signal is applied to the setting terminal αη, the count number is It is equipped with a switching signal output terminal υ which outputs an H level signal when the set value is reached, and a control terminal (two functions) which controls the counting operation of the counter circuit 05).

(2 (2) (a) and 5) each have a cathode connected to the first
The first terminal (1st terminal 2nd terminal a9) of the counter circuit (15)
and a third terminal (first, second, and third light emitting diodes for displaying the number of music selections, whose anodes are connected to the power supply via a resistor (A), and whose lighting indicates the number of selected songs. 1 counter circuit (has the function of displaying the set number of 15+). (27) is the first selection switch that controls switching from the song selection operation state to the playback state, and the first counter circuit has the function of displaying the set number of 15+. It is inserted and connected between the signal output terminal Cυ and the reproduction input terminal of the control circuit (5).The control terminal (2) of the first counter circuit (15) is connected to the ground via a resistor (281). and is connected to the output terminals (6) and (7) of the control circuit (5), and performs a counting operation when an H level signal is output from the output terminal (6) or (7). (29) is the no-signal portion detection circuit θ
This is a second counter circuit that counts the number of I level signals output to the output terminal (14) of the input terminal (3) to which the output signal from the output terminal (14) is applied.
0), a setting terminal (311,
The first terminal (32, second terminal (3; east third terminal 04) outputs an L level signal sequentially every time a 1■ level signal is applied to the setting terminal G11, and when the count reaches the set value. Switching signal output terminal c35) that outputs an H level signal
, a control terminal 06) for controlling the counting operation of the counter circuit e9) and a reset terminal 07 for resetting the counter circuit (two wings). (38), (g)
and the second counter circuit (29) whose cathodes are connected to the second counter circuit (29
)'s 1st terminal (3 2nd terminal (3rd floor and 3rd terminal t34)
) and whose anodes are connected to a power supply via a resistor (41), and whose lighting causes the second display number to be displayed.
The counter circuit (2! has the function of displaying the set number of lees) is a second selection switch (42) that controls switching from the playback operating state to the rewinding state, and the second counter circuit (2! It is inserted and connected between the switching signal output terminal o9 of the control circuit (1) and the rewinding input terminal of the control circuit (5).

The control terminal (support) of the second counter circuit (c) is grounded via a resistor (431) and connected to the output terminal (8) of the control circuit (5), and the output terminal ( 8) is configured to perform a counting operation when a level signal of level ■(1) is output.Also, when the second counter circuit 0 is output, the control circuit (5) performs a counting operation for fast forwarding or rewinding. The reset terminal 437) is connected to the output terminals (6) and (7) of the control circuit (5) so that it is reset when the drive signal of (44J) is output.
The closing operation causes an H level signal to be applied to the setting terminal (!η) of the first counter circuit a9 and the setting terminal (31) of the second counter circuit (29+), and the first counter circuit (15) and the second counter circuit (29+) are This is a count number setting switch for setting the count number of the 2-counter circuit (c).

When the count number of the first counter circuit α is not set, an H level signal is output to the first terminal 0, the second terminal (1) and the third terminal 1, and the count number is not set. Close the setting switch (one time) and connect the setting terminal (1
7) When the IcH level signal is applied, an L level signal is output to the first terminal 0 (to), and the first music selection number display light emitting diode (to) lights up. In addition, in this state, close the count number setting switch (44) again and set the setting terminal 07.
) When a signal of level I (181) is applied to the first terminal (181), an L level signal is output to the second terminal (1!1), and a light emitting diode (24) for displaying the number of selected songs is output. will light up instead of the light emitting diode (23) for displaying the number of selected songs.Similarly, when the switch for setting the count number (44J) is closed again, the light emitting diode (C) for displaying the number of selected songs will light up in place of the number of selected songs. Display light emitting diode (
24) will turn on instead of K. In addition, when the count number setting switch (44) is closed while the light emitting diode Q (G) for displaying the number of third music selections is lit, the light emitting diode Q (G) for displaying the number of third music selections is replaced by the light emitting diode Q (G) for displaying the number of music selections. The number display light emitting diode (2 moat) lights up. By closing the count number setting switch (44J) and applying an H level signal to the setting terminal (1η), the first music selection number display light emitting diode ( C), the second music selection number display light emitting diode (24) and the third music selection number display light emitting diode QQ are lit in this order to display the set count number.Also, the output of the no signal detection circuit α (to) When an H level signal is applied from terminal α4 to input terminal α6), the lit display light emitting diodes change from the third music selection number display light emitting diode (251) to the second music selection number display light emitting diode (24, From the light emitting diode (24) for displaying the number of selected songs to the light emitting diode (2) for displaying the number of selected songs
When the light emitting diode (c) for displaying the number of songs selected is lit, the signal at level I (16) changes to the input terminal (16).
The first counter circuit a is configured to be dark so that when the voltage is applied to 1, all the light emitting diodes are turned off and an H level signal is output from the switching signal output terminal eυ. The second counter circuit (2) is also configured in the same way, and when the count setting switch (44I is closed, an H level signal is applied to the setting terminal 61), the first reproduction number display light emitting diode ( ), the second playback number display light emitting diode (31) and the third playback number display light emitting diode (4G) are lit in the order of When the light emitting diode for display is lit, the light emitting diode for displaying the third playback number (40, the light emitting diode for displaying the second playback number G)
→ and the first playback number display light emitting diode (Tai). If a high level signal is applied to the input terminal (to) while the first playback number display light emitting diode (G5) is on, all the light emitting diodes turn off and the switching signal output terminal (G5) A level signal is output. In addition, by performing a fast forward or rewind operation when the tape recorder is in the playback mode, the drive mechanism is configured so that the magnetic tape can be run at high speed while the playback magnetic head 00) is in contact with the magnetic tape in the song selection mode. is configured. Further, the no-signal portion detection circuit θ3) is arranged such that the no-signal portion detection time during the song selection operation and the no-signal portion detection time during the playback operation are switched, that is, the no-signal portion detection time during the playback operation is switched. The pressure is set so that it is longer than when selecting a song.

The present invention is constructed as described above, and its operation will be explained next. Fast forward operation button (2), rewind operation button (
3) and the playback operation button (4), the control circuit (5)
), each output terminal (6), (power and (8)
According to each operation, an H level signal is output and applied to the operation switching circuit (9). As a result, the operation switching circuit (9
) The various operating states of the tape recorder are determined by the suction operation of the plunger, etc.

When the stop operation button (1) is operated while the tape recorder is in the fast forward, rewind, and playback operating states, the output terminals (6), (7), and (8) of the control circuit (5) are activated.
The signal that was being outputted changes from the H level to the L level, causing the Nari tape recorder to return to the stopped state. Although each operation is switched in this way, the song selection operation will be explained next. This music selection operation is performed using the first selection switch (27
) and close the count number setting switch (44J).
Here, we will explain the case where the second song is found and played back by rewinding. When searching for the second song, the number set in the first counter circuit 0!19 is set to 2 by closing the count number setting switch (44) twice.

When the count number setting switch (44) is closed twice, the output of the second terminal (19) of the first counter circuit Q5 becomes L level, and the light emitting diode for displaying the second music selection number (
24) lights up to indicate that the number of settings is 2. In this state, when the rewinding operation button (3) is operated, the magnetic tape is rewinded, and a rewinding music selection operation state is established. In such a music selection operation state, signals such as music recorded on the magnetic tape are reproduced at high speed by the reproduction magnetic head α0), but when a non-signal portion between the signals is reproduced, a non-signal portion detection circuit is activated. An H level signal is output to the output terminal I of (13). The output terminal 04)
The H level signal output to the first counter circuit αω
As a result, the second light emitting diode Q4) for displaying the number of music selections turns off and the light emitting diode Q4) for displaying the number of music selections turns on. Then, when the magnetic tape is further rewound and the next no-signal section is reproduced, an H level signal is output again from the output terminal 04 of the no-signal section detection circuit (13) and the first counter circuit α90 input terminal (16) is applied. The first counter circuit Q5)
When a signal of [■] level is applied to the input terminal 061 of , the light-emitting diode (c) for displaying the number of selected songs turns off, and a signal of H level is output from the switching signal output terminal Cυ. The H level signal outputted from the switching signal output terminal row is input to the playback input terminal of the control circuit (5) through the first selection switch (5), and the tape recorder is released from the song selection state and enters the playback state. As a result, the second song desired by the user is played. In this way, the song selection operation is performed by rewinding, but the song selection operation by fast forwarding is also performed in the same way, so a description thereof will be omitted. Furthermore, when the count number setting switch (44) is closed, an H level signal is input to the setting terminal 07 of the first counter circuit 0■, and similarly, an H level signal is input to the setting terminal 01) of the second counter circuit 0. signal is input, and the light emitting diodes for displaying the first playback number are lit in order starting from the country. However, when an H level signal is output from the output terminal (6) or (7) of the control circuit (5) in conjunction with the music selection operation, the H level signal is applied to the reset terminal 67). Counter circuit 09) will be reset. Therefore, during the song selection operation, the first playback number display light-emitting diode (2), the second playback number display light-emitting diode 09, and the third playback number display light-emitting diode (4G) are all turned off, causing an inexplicable situation for the user. It doesn't make an impression.

The music selection operation is performed as described above, but next, the repeat operation will be explained. Such a repeat operation is performed by closing the first selection switch (5) and the second selection switch (42) and operating the count setting switch (44J), but here two songs are played repeatedly. Let's explain the case.

When the count number setting switch (44) is closed twice, the setting terminal 07) of the first counter circuit Q51 and the second
An H level signal is applied twice to each setting terminal 01) of the counter circuit, and the light emitting diode for displaying the second song selection number (
) and the second playback number display light emitting diode 43!1 light up to indicate that the set number is 2. In such a state, when the user operates the playback operation button (4), an H level signal is output from the output terminal (8) of the control circuit (5), and the tape is The recorder enters playback mode. In such a reproducing operation state, since an H level signal is applied from the output terminal (8) of the control circuit (5) to the control terminal (36) of the second counter circuit (2 Sakaki), the second counter circuit (29) The first counter circuit Q51 is in the state of performing a counting operation, but since no H level signal is applied to the control terminal (2) of the first counter circuit A51, the first counter circuit Q51 is in a state of not performing a counting operation. The signal being played is reproduced by the reproduction magnetic head 00), then input to the amplifier circuit (formerly), amplified, and output to the output terminal (121).When the reproduction of the first song is finished, there is no signal for a predetermined period of time. Since the condition continues, the no-signal detection circuit (131 output terminal (14)
) A KH level signal is output, and the H level signal is applied to the input terminal 06) of the first counter circuit (15) and the input terminal (to) of the second counter circuit (2). The first counter circuit (+51) is in a non-counting state, so it does not change to the same extent, and the second counter circuit (+51)
Performs counting operation only in c). When the second counter circuit 129) performs a counting operation, the second playback number displaying light emitting diode o1 goes out and the first playback number displaying light emitting diode (to) lights up. When the playback operation of the second song is completed, the output terminal (1) of the no-signal portion detection circuit 03) is
4) The Ic signal at H level is outputted again and applied to the input terminal (A) of the second counter circuit (29). The second counter circuit c! When a KH level signal is applied to the adjacent input terminal (to), the first playback number display light emitting diode (
When the 3 barrels go out, H level signals are output from the switching signal output terminals (3!).The switching signal output terminals (3!
The H level signal outputted from 51 is input to the rewinding input terminal of the control circuit (5) through the second selection switch (421), and the tape recorder is switched from the playback state to the rewinding music selection state. This music selection operation state is the same as the music selection operation described above, and when a no-signal part is reproduced by the reproducing magnetic head (10), the no-signal part detection circuit (+31 output terminal (14+) receives an I (level signal). The lI level signal output to the output terminal θa is output to the first counter circuit (one input terminal (16
) is applied to perform a counting operation, so the second light-emitting diode (24) for displaying the number of songs selected turns off, and the first light-emitting diode (231) for indicating the number of songs selected turns on.Furthermore, the magnetic tape is rewound. When the no-signal part is reproduced again, the no-signal part detection circuit (output terminal of 131 (l again from +4+)
A level signal is output to the first counter circuit (151
When an H level signal is applied to the input terminal (+6+, input terminal 06 of the I-th counter circuit αω), the first music selection number display light emitting diode (c) goes out and the switching signal output terminal (An H level signal is output from 21+. The H level signal output from the switching signal output terminal (2) is input to the reproduction input terminal of the control circuit (5) through the first selection switch (271). Then, the tape recorder is released from the song selection mode and enters the playback mode.As a result of this operation, the song that was originally played is played again, and the user is forced to select several songs that he or she wants to listen to. You can listen to the playback repeatedly.This operation is performed when two songs are played repeatedly, but if you want to play one song repeatedly or three songs repeatedly, press the count setting switch (44). ) once and three times, and then perform the playback operation.

In this embodiment, the first counter circuit 09 and the second counter circuit (the maximum count number of 2 is set to 3, but it can also be configured with a larger number or a smaller number of counter circuits. Since the circuit 031 is used as a no-signal portion detection circuit during playback operation and song selection operation, it is necessary to switch the detection time of the no-signal portion, but if two detection circuits are provided, one for playback and one for song selection, the detection time can be switched. There will be no need.

(F) Effects of the Invention The control circuit of the present invention is not only extremely convenient because it can repeatedly play not only one song but any number of songs recorded on a magnetic tape. Since the number of songs to be repeatedly played is set by the count number setting switch that is created in the operating state, the count numbers of the two counter circuits can be changed by the same number, and the repeat playback operation can be performed accurately. This invention not only has excellent operability, but also has extremely great effects when applied to a tape recorder.

[Brief explanation of drawings]

The illustrated circuit is one embodiment of the control circuit of the present invention. Explanation of main drawing numbers (2)...Operation button for fast forwarding, (3)...Operation button for rewinding, (4)...Operation button for playback, (5)...Control circuit, ( 9)...Operation switching circuit, 03)...
No-signal portion detection circuit, 05)...First counter circuit, (2■...Light emitting diode for displaying the number of selected songs,
(241...Light emitting diode for displaying the number of second song selections, (
25) ... Light emitting diode for displaying the number of third song selections, 0η・
...First selection switch, (2!1...Second counter circuit, 08)...First playback number display light emitting diode, C3■...Second playback number display light emitting diode,
(40... Third playback number display light emitting diode, (4
2)...Second selection switch, Oa...Switch for setting the count number.

Claims (1)

[Claims] (]) In a tape recorder equipped with a song selection function that switches to the playback mode by detecting the no-signal portion between the signals recorded on the magnetic channel in the fast-forward and rewind states, the no-signal portion during the song selection operation is A first counter circuit that counts the number of signals and outputs a switching signal to switch the tape recorder to the playback state when the count reaches a set number; The circuit comprises a second counter circuit that outputs a switching signal to switch the tape recorder to the rewind state when the tape recorder reaches the rewind state, and a count number setting switch that sets the count numbers of the first counter circuit and the second counter circuit. The number of settings of the first counter circuit and the second counter circuit is changed by the same number by operating a setting switch, so that the number of settings of the first counter circuit and the second counter circuit are made to be the same. control circuit for a tape recorder.