JPH0320802B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cassette tape playback control device.

Conventionally, controls such as recording, playback, fast forwarding, rewinding, stopping, etc. in a tape deck have been performed mainly by manual operation using a mechanical structure.
Such a tape deck requires manual operation, which is troublesome.

To solve such problems, Japanese Patent Application Laid-Open No. 55
- As shown in Publication No. 146612, a magnetic recording piece for information recording is provided on a cassette half of a magnetic tape,
With the cassette half installed in the playback position,
Some devices read information from a magnetic recording piece by scanning a magnetic head with a head moving mechanism, and reproduce the magnetic tape based on the information.

However, in this prior art, since the magnetic head is moved while in contact with the cassette half, it is necessary to provide a head movement mechanism, which complicates the configuration and increases the size of the device, making it difficult to downsize the tape deck. The problem is that it becomes difficult.

An object of the present invention is to utilize the parallel movement of the cassette half to write information to and read information from a magnetic recording piece when loading a cassette half of a magnetic tape. To provide a cassette tape playback control device that eliminates the need for a mechanism, enables simplified configuration and miniaturization of equipment, and can automatically control a tape deck during playback of each cassette tape.

The present invention provides a cassette tape playback control device in which a cassette tape is loaded and ejected by an automatic loading mechanism provided in a tape deck, and a device for inputting control information indicating operation information at the time of recording when recording the cassette tape. an input means; a magnetic recording piece fixed to the surface of the cassette half; and when the cassette half is loaded/ejected and moved by the automatic loading mechanism, the magnetic recording piece contacts the magnetic recording piece of the cassette half to read information. a magnetic head for reading and writing; a recording control means for writing control information input from the input means onto a magnetic recording piece via the magnetic head when the cassette half is ejected; A cassette tape playback control device comprising a playback processing device that reads control information via a magnetic head and controls playback of a cassette tape based on the control information.

FIG. 1 is a simplified diagram of an embodiment of a cassette tape 21 and tape deck according to the present invention. A magnetic recording piece 3 made of magnetic tape or the like is fixed to a surface of the cassette half 1 provided with a safety piece 2 for preventing erroneous recording. The control device 4 is realized by a microcomputer or the like, and includes a processing device 5 and ports 6, 7, 8, 9, 10, 11, 12, 13, and ports connected to the processing device 5.
14 and a key input device 6 connected to the processing device 5
2. Each port 6-14 is connected to each part of the tape deck as described below.

The port 6 is connected via a line 15 to a magnetic head 16 for writing and reading information on the magnetic recording piece 3. This magnetic head 16
is brought into contact with the magnetic tape when the automatic loading mechanism 61 is driven. An interface 17 is interposed between the magnetic head 16 and the port 6. This interface 17 encodes the digital signal from the port 6 and inputs it to the magnetic head 16, converts the encoded signal from the magnetic head 16 into a digital signal, and inputs it to the port 6.

Port 7 is connected to file search device 19 via line 18 . File search device 19
A winding diameter search sensor 20 is connected to the winding diameter search sensor 20 . This winding diameter search sensor 20 detects the cassette tape 2.
The outer diameter, ie, the winding diameter, of the magnetic tape 23 wound on one reel 22 is detected.

The port 8 is connected to a motor control device 2 that controls a motor 24 that rotationally drives a tape deck capstan (not shown) and a motor 25 that rotationally drives a reel stand (not shown) for fast forwarding and rewinding.
6 via line 27. Therefore, a signal from port 8 to motor control device 26 causes motor 24 to be activated during playback of a cassette tape.
is driven, and the motor 25 is driven during fast forwarding and rewinding.

Port 9 is connected to selection switch 29 via line 28, and the selection mode of selection switch 29 is input to port 9. Depending on the selection of the selection switch 29, an audible signal obtained from an external record or magnetic tape is input to the selection switch 29 from a line 30. The selection switch 29 has a common contact 71 and individual contacts 72, 73, and 74. A line 31 is connected to the selection switch 29. line 31, noise reduction circuit 32 and line 3
3 are connected in parallel. The line 33 is connected to the individual contact 34, and the noise reduction circuit 32 is connected to the individual contact 34.
Connected to 5. The switch 36 is a common contact 37
and the individual contacts 34, 35. The input signal from the common contact 37 is input to a line 39 or a magnetic head 40 via a recording amplifier circuit 38.
Therefore, when recording on the cassette tape 21, recording is performed on the magnetic tape 23 by the magnetic head 40.

Port 10 is connected via line 41 to tape type selection circuit 42 . This tape type selection circuit 42 selects the type of magnetic tape 23, for example, normal tape, ferrochrome tape, chromium oxide tape, or metal tape, and outputs a signal to an oscillator 44 via a line 43 in accordance with the selection. do. Therefore, in the oscillator 44, a bias current corresponding to the type of magnetic tape 23 is applied to the line 39 according to the selection mode of the tape type selection circuit 42.

A line 45 is connected to the magnetic head 40 in parallel to the line 39. An equalizer circuit 46 is connected to the line 45. Equalizer circuit 46 is connected to common contact 47 of switch 48. The switch 48 has a common contact 47 and an individual contact 4.
9.50. Individual contact 49 is line 51
connected to. A noise reduction circuit 5 is provided at the individual contact 50.
2 is connected to line 53, and noise reduction circuit 52 is connected to line 53. The line 53 and the line 51 are connected in parallel to an amplifier circuit 54. The amplifier circuit 54 is connected to left and right speakers 56, 5 via a line 55.
7 is connected.

Port 11 is connected to the switches 36, 48 by line 58. These switches 3
6 and 48 are switched in conjunction, and when the common contact 37 and the individual contact 35 of the switch 36 are connected,
The common contact 47 and individual contacts 50 of the switch 48 are connected. Port 12 is connected to the amplifier circuit 54 via line 59.

Port 13 is connected to automatic loading mechanism 61 via line 60. By driving this automatic loading mechanism 61, the cassette tape 2
1 is moved in the direction of arrow 76. Port 14 is
It is connected via a line 63 to a display device 64 realized by a cathode ray tube or the like. This display device 6
4, information stored in the processing device 5, which will be described later, is displayed.

FIG. 2 is a simplified flowchart for explaining the operation of controlling the tape deck during reproduction of the cassette tape 21 according to the present invention. In step s4, when the cassette tape 21 is inserted into the tape deck and automatically loaded by the automatic loading mechanism 61, the processing device 5 that receives the signal from the port 13 writes the information written on the magnetic tape 3 to the port 6. A signal for reading information is output. As a result, the magnetic head 16
The interface 17 reads out the information written into the magnetic recording piece 3 by contacting the magnetic recording piece 3.
is input. Interface 17 to line 1
Information is input to port 6 via port 5.

In step s5, port 6 is processed by processing device 5.
It is determined whether the information on the magnetic recording piece 3 has been accurately input. If the information on the magnetic recording piece 3 is not correctly input, a signal is output from the port 13 via the line 60 to the automatic loading mechanism 61 in order to drive the loading motor 75 again in step s6. As a result, step s4 is repeated again.

When the information on the magnetic recording piece 3 is accurately input to the port 6, in step s7, it is determined in the processing device 5 whether or not the noise reduction circuit 52 is energized, and the noise reduction circuit 52 is not energized. when,
Move to step s9. When it is determined in step s7 that the noise reduction circuit 52 is activated, step s8
At this point, a signal is output from the port 11 via the line 58 to the switch 48 to connect the common contact 47 and the individual contacts 50.

In step s9, the processing device 5 determines whether the type of magnetic tape 23 has been designated. As a result, in step s10, a signal for selecting the selection mode corresponding to the type of each magnetic tape 23 is inputted from the port 10 to the tape type selection circuit 42. As a result, a bias current from the oscillator 44 is applied depending on the type of magnetic tape 23.

In step s11, the processing device 5 determines whether or not volume control is necessary. As a result, in step s12, volume control signals for the left and right speakers 56 and 57 are input from the port 12 to the amplifier circuit 54 via the line 59. Therefore, for example, only the left speaker 56 may be driven, or the right speaker 5 may be driven.
Control is performed such that the volume of No. 7 is increased.

In step s13, the processing device 5 determines whether each recording area recorded on the magnetic tape 23 is to be repeatedly reproduced. When repeated playback is performed, in step s14, a signal is sent from the port 8 to the motor control device 26 to drive the motor 25, which rotates the reel stand that is removably fitted in order to rotate the reel 22 of the cassette tape 21. Output. As a result, the magnetic tape 23 is rewound and reproduced repeatedly.

When the cassette tape 21 is played back, the information obtained by detecting the unrecorded area formed between each recording area from the amplifier circuit 54 is input to the port, and the file search device 1 is input to the port 7.
The winding diameter information from 9 is input to the processing device 5. Accordingly, the treatment device 5 determines which recording area of the magnetic tape 23 is being reproduced. Accordingly, the signals output from ports 12 and 8 are controlled in steps s12 and s14.

FIG. 3 is a simplified flow chart for explaining the operation of writing information for controlling a tape deck according to the present invention. In step s1, the processing device 5 determines whether or not an eject signal has been inputted to the port 13 by the automatic loading mechanism 61 to eject the cassette tape 21 on which recording has been completed out of the tape deck. When the eject signal is input, it is determined in step s2 whether control information necessary for playing back the cassette tape 21 has been stored in the processing device 5 during recording. When no information is stored, a signal is output from the port 13 via the line 60 to the automatic loading mechanism 61 to drive the loading motor 25, thereby preventing information from being written to the magnetic recording piece 3. Cassette tape 2
1 is ejected from the tape deck.

When the cassette tape 21 is recorded by the tape deck according to the present invention, a signal corresponding to the selection mode of the selection switch 29 is sent to the line 28 at the port 9.
Input via . Also at this time, port 11
In this case, the noise reduction circuit 3 is turned on by the switch 36.
A signal indicating whether or not 2 is energized is input via line 58. A signal corresponding to the selection mode of the tape type selection circuit 42 is input to the port 10 via a line 41. Furthermore, at this time, a detection signal of the winding diameter of the magnetic tape 23 from the winding diameter search sensor 20 is input to the port 7 . The signals inputted to the ports 9, 11, 10, and 7 described above are stored in the processing device 5 as information for controlling the tape deck when the cassette tape 21 is played back. Further, when the cassette tape 21 is played back by the key input device 62, the left and right speakers 5
Information such as the volume control and the number of times each recording area is repeatedly played is stored in the processing device 5 along with the above information.

In step s3, when the information is stored in the processing device 5, a signal is input from the port 13 to the automatic loading mechanism 61 via the line 60, whereby when the cassette tape 21 is ejected and moved, the magnetic head is 16 is brought into contact with the magnetic recording piece 3, and the information stored in the processing device 5 from the port 6 via the line 15 is written to the magnetic recording piece 3 via the interface 17. At the end of writing this information, the cassette tape 2
1 is discharged outside the tape deck.

In the embodiment described above, the playback information of the cassette tape 21 is input when the cassette tape 21 is recorded, but in another embodiment of the present invention, the playback information of the cassette tape 21 is input from the key input device 62 when the cassette tape 21 is played back. may be input and recorded on the magnetic recording piece 3.

As described above, according to the present invention, a magnetic recording piece on which information for controlling a tape deck during playback of a cassette tape is written is fixed to the surface of a cassette half, and a magnetic head for reading information on this magnetic recording piece is fixed to the surface of a cassette half. The magnetic head is connected to the playback control device of the tape deck, and the magnetic head is configured to read information when the cassette half is mounted and moved by the automatic loading mechanism, so that the magnetic head moving mechanism can be omitted. With a simple and compact configuration, a cassette tape can be automatically played by simply loading the cassette tape into a tape deck.

[Brief explanation of the drawing]

FIG. 1 is a simplified diagram of a cassette tape 21 and tape deck of one embodiment according to the present invention;
The figure is a simplified flowchart for explaining the braking operation of the tape deck during playback of the cassette tape 21 according to the present invention, and FIG. 3 is a simplified flowchart for explaining the operation of writing information for controlling the tape deck according to the present invention. This is a flow chart. 1...Cassette half, 3...Magnetic recording piece, 4
...Control device, 5...Processing device, 6-14...Port, 16, 40...Magnetic head, 21...Cassette tape, 61...Automatic loading mechanism, 6
2...Key input device.

Claims (1)

[Scope of Claims] 1. A cassette tape playback control device in which a cassette tape is loaded and ejected by an automatic loading mechanism provided in a tape deck; an input means for inputting information; a magnetic recording piece fixed to the surface of the cassette half; and a magnetic recording piece that comes into contact with the magnetic recording piece of the cassette half when the cassette half is loaded/ejected by the automatic loading mechanism. a magnetic head for reading and writing information using the input means; a recording control means for writing control information inputted from the input means onto the magnetic recording piece via the magnetic head when the cassette half is ejected; A cassette tape playback control device comprising: a playback processing device that reads written control information via a magnetic head and controls playback of a cassette tape based on the control information.