JPS6199905A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent program information from disappearing due to a mis-operation by providing a program information controlling circuit and a medium fetching mechanism on the titled device, and constituting it so that a sequence controlling circuit controls a motor, the program information controlling circuit and the magnetic recording medium fetching mechanism in accordance with a prescribed order. CONSTITUTION:By a sequence controlling circuit 25, first of all, a magnetic recording medium is set again to a program information recording position, and subsequently, rewriting of updated program information is executed, and thereafter, the medium is fetched. That is to say, when a cassette fetching button of an operating part 26 is pushed, the operating part 26 sends a control start signal to the sequence controlling circuit 25, and first of all, a magnetic tape 3 is rewound to the initial end. By detecting signal of the initial end of the magnetic tape 3, the sequence controlling circuit 25 switches a device to a recording operation only in case when the program information has been updated, sends a command to a program information controlling circuit 22, and writes the contents of a program information memory 21 in a program information recording area on the magnetic tape 3 through a signal processing circuit 6. The program information controlling circuit 22 sends a write end signal to the sequence controlling circuit 25, when recording of the program information has been ended.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention a) Devices for recording and reproducing data on magnetic tape, etc., such as PCs, which directly record M-format music signals, image information, and other digital data, and This article relates to a magnetic recording and reproducing device capable of reproducing data.

Conventional configurations and their problems In recent years, devices for recording and playing character data, computer programs, PCM music signals and image signals on magnetic tapes and magnetic disks have been developed, and high-quality music playback devices have been developed. It is also used as a mass storage device for computers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary head type magnetic recording and reproducing device will be described below as an example of a conventional magnetic recording and reproducing device with reference to the drawings.

FIG. 1 is a block diagram of a conventional rotary head type magnetic recording/reproducing device, which includes an IH cylinder, 2 a head, 3 a magnetic tape, 4 a cassette, 5 a capstan, 6rr signal processing circuit, and 7rr program information control circuit. , 8 program information memory, 9a motor, 1011) cassette ejecting mechanism, and 11a operating section.

The operation of the magnetic recording/reproducing apparatus configured as described above will be described below. On the cylindrical surface of the head 2σ cylinder 10 in contact with the magnetic tape 3, a plurality of heads are usually arranged at mutually symmetrical positions, for example, two heads are arranged 180 degrees apart. With cylinder 1 rotating at a constant rotation speed,
A magnetic tape 3a is wound around the head 2 so as to be scanned diagonally at a constant speed. Then, the magnetic tape 3 is alternately scanned by the 12 head/stripes 2 to form data tracks. During recording, the head 2 writes PCM data generated by the signal processing circuit 6 onto the magnetic tape 3, and during reproduction, the head 2 reads out the signal on the magnetic tape 3, transfers it to the signal processing circuit 6, and reproduces the original data. do.

Since data is handled as a digital signal during PCM recording and reproduction of music signals, it is possible to compress the recording area in the time axis direction, so auxiliary information called a subcode can be stored in the area left after compression. Normally, a song number and time information are recorded in the subcode, and are used to search for a song, display time, etc. during playback. Also, in order to make it easier to search for a song, there is a method that records the song number and the start time of that song number in one place, reads this information first when playing, stores it in memory, and searches based on it. Be taken. This one
The data collected in these locations will hereinafter be referred to as program information.

When new recording is performed, the program information can be updated to normal program information. Although the updated program information is temporarily stored in the memory, it must be finally rewritten to the updated program information on the Kldl-tape.

In FIG. 1, it is assumed that new recording has been performed and updated program information is stored in the program information memory 8. At this time, when the program information write operation is performed, the operation unit 11rX first instructs the motor 9 to rewind the magnetic tape to the starting edge, and then sends a signal to the program information control circuit 7 to write the program information to the program information control circuit 7. The contents of the information memory 8 are written to the program information recording area at the beginning of the magnetic tape 3 through the signal processing circuit 6. After this, when a cassette ejecting operation is performed to take out the cassette 4, a command is sent from the operating section 11, the cassette ejecting mechanism 10 is operated, and after storing the magnetic tape 3 in the cassette 4, the cassette 4 is ejected.

However, with the above configuration, it is necessary to perform an operation to rewrite the program information, and if you forget to do this and remove the cassette, the new program information will be lost and you will not be able to actually record it. Since the location of the program to be processed does not match the program information, there is a problem in that subsequent searches based on the program information cannot be performed correctly.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a magnetic recording and reproducing device that can prevent program information from being lost due to erroneous operation when new recording is performed. , a sequence control circuit that starts operation upon receiving a command from the operating unit to take out the magnetic recording medium from the recording/reproducing device; and a sequence control circuit that receives a command from the sequence control circuit to program the current recording or reproducing position on the magnetic recording medium. A motor for returning the information to the information recording position, a program information memory for temporarily storing program information for identifying and managing updated data when newly recorded, and controlling reading and writing of the program information from the magnetic recording medium. and a medium ejecting mechanism for ejecting the magnetic recording medium from within the recording/reproducing apparatus, and the sequence control circuit is configured to control the motor, the program information control circuit, and the magnetic recording medium ejecting mechanism in a predetermined order. 0 Explanation of an Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. .

FIG. 2a shows a block diagram of a rotary head type magnetic recording/reproducing apparatus according to an embodiment of the present invention. In Fig. 2, 1 is a cylinder, 2 is a head, 31d magnetic tape,
4a cassette 7, 6-capstan, 6a signal processing circuit, 21a program information memory, 22 program information control circuit, 23 motor, 24a cassette ejecting mechanism,
The operation of the rotary head type magnetic recording/reproducing device configured as shown in FIG. 26 with a sequence control circuit and one or more 2esrr operation sections will be described below with reference to the flowchart of FIG. It is assumed that when new recording is performed, updated program information is stored in the program information memory 21.

After this, when the cassette eject button of the operating section 26 is pressed to take out the cassette 4, a control start signal is sent to the operating section 26 to the sequence control circuit 25. The sequence control circuit 251d first operates the motor 23 to rewind the magnetic tape 3 to the starting end. Only when the program information is updated by the sequence control circuit 26 in response to a detection signal of the start end of the magnetic tape 3, the device is switched to recording operation, and a command is sent to the program information control circuit 22 to signal-process the contents of the program information memory 21. The program information is written to the program information recording area on the magnetic tape 3 through the circuit 6. At the same time, the motor 23 is controlled so that the feeding speed of the capstan 5 is the same as that during normal recording. Program information control circuit 22 [When recording of program information is finished, sends a write end signal to the order control circuit 25. This signal causes the sequence control circuit 26 to cancel the recording operation and cause the motor 23 to perform the rewinding operation again.

The sequence control circuit 26a is activated by the detection signal of the start end of the magnetic tape.
Next, a command is sent to the cassette ejecting mechanism 24. In response to this command, the cassette ejecting mechanism 24i stores the magnetic tape 3 in the cassette 4 and then ejects the cassette. The sequence control circuit 25i detects that the cassette has been taken out and returns to its original state.

The behavior when no new recording is made is explained below. When the cassette eject button of the operation section 2e is pressed, a control start signal is sent to the order control circuit 26 of the operation section 261d. The sequence control circuit 26 first operates the motor 23 in order to rewind the magnetic tape 3 to the starting end. If the song information is not updated after receiving the detection signal of the start end of the magnetic tape 3, the order control circuit 26 then sends a command to the cassette ejecting mechanism 24. In response to this command, the cassette ejecting mechanism 24 stores the magnetic tape 3 into the cassette 4 and then ejects the cassette 4. The order control circuit 25 detects that the cassette 4 has been taken out and returns to the original state.

As described above, according to this embodiment, by rewriting the updated program information at the same time as the cassette is removed, it is possible to prevent forgetting to rewrite the program information.

Effects of the Invention As is clear from the above explanation, the present invention has advantages of a sequential control circuit that operates in conjunction with the operation of ejecting a magnetic recording medium.
First, set the magnetic recording medium to the program information recording position, then rewrite the updated program information,
Since it is configured to control a series of operations such as ejecting the medium after a certain time, when a new recording is performed, a.
The program information on the magnetic recording medium is always rewritten,
This provides an excellent effect of preventing program information from being lost due to erroneous operation.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a conventional magnetic recording/reproducing device, Fig. 2a is a block diagram of a magnetic recording/reproducing device according to an embodiment of the present invention, and Fig. 3 is a flowchart showing processing of an embodiment of the present invention. . 21...Program information memory, 22...
...Program information control circuit, 23...Motor, 24...Cassette ejecting mechanism, 26...
... Sequence control circuit, 26... Operation section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A sequence control circuit that starts operation upon receiving a command from the operation unit to take out a magnetic recording medium from the recording/reproducing device; and a sequence control circuit that receives a command from the sequence control circuit and records the current recording or reproduction position on the magnetic recording medium as program information. a motor for returning to the position; a program information memory for temporarily storing program information for identifying and managing updated data when newly recorded; and a program information control for controlling reading or writing of the program information from a magnetic recording medium. A magnetic recording device comprising a circuit and a medium ejecting mechanism for ejecting a magnetic recording medium from within a recording/reproducing device, wherein the order control circuit controls the motor, the program information control circuit, and the magnetic recording medium ejecting mechanism in a predetermined order. playback device.