JPS60651A - Magnetic disc device - Google Patents

Abstract

PURPOSE:To read information on a case while the case is loaded with simple and inexpensive constitution by providing a means for reading recording information on the magnetic disc storage case to a carriage for moving a magnetic head. CONSTITUTION:In reading recording information of bar code labels 3a, 3b of a loaded magnetic disc cassette 1, a prescribed voltage is applied to a phototransistor (TR)16a and a light emitting diode 16b of a reading element 16 provided to the carriage 10 at first, a stepping motor 13 is driven, a pulley 14 is turned in the direction of the arrow C, the carriage 11 is pushed and moved toward the arrow B by unwinding a steel belt 12a at the outside wound around the pulley 14, and the light emitting diode 16b is moved from the outer end to the inner end along the surface of the bar code label 3a. The reflected light of the light emitting diode 16b received by the photo (TR)16a in this case is changed by the stripe pattern of the bar code label 3a and a read signal S1 is led to an amplifier circuit 17.

Description

TECHNICAL FIELD The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device that records and reproduces information by sliding a magnetic head onto a magnetic disk housed in a flexible case or a rigid case. .

PRIOR ART In the magnetic disk device of this scale, a configuration is known in which information recorded on the magnetic disk storage case described in "2" is read by a reading means provided in the device, and recording and reproducing operations are performed according to the result. There is.

For example, a barcode label on which information such as management information is recorded when managing a number of magnetic disks, or a magnetic tape label is attached to the case, and the information is read by an optical or magnetic reading means installed in the device. A configuration is known in which the information is read by the user and the operation is performed according to the result.

By the way, when reading the information in case 2 with the above configuration, at least one of the case side and the reading means side must be moved.

In the conventional configuration, providing a separate mechanism for transporting the reading means increases the size and cost of the device, so the reading means side is fixed and the case is moved when the case is inserted into the drive of the device. Generally, reading is performed by moving from side to side.

However, with this configuration, reading can only be performed when the case is inserted. In other words, there is a drawback that reading cannot be performed with the case attached.

In order to overcome this drawback, if a new transfer mechanism is provided to move the reading means, the apparatus will become larger and the cost will increase as described above.

Purpose The present invention has been made in view of the above-mentioned circumstances, and has a simple and inexpensive structure that does not require a separate transfer mechanism for the reading means. The purpose is to provide a magnetic disk device that can read .

EXAMPLES The present invention will be described in detail below based on examples shown in the drawings.

A magnetic disk cassette (hereinafter abbreviated as cassette) denoted by the reference numeral 1 in FIGS. 1 and 2 is a case made of plastic or other rigid material that accommodates a magnetic disk 2 of a magnetic recording medium. ,
i l) are joined. Here, FIG. 1 shows the cassette half 1a side, and FIG. 2 shows the cassette half ib side.

Center holes 1c and lc are formed in the center of each of the cassette halves la and +b, which are concentric with the center hole 2a of the magnetic disk 2, and on both sides there are index holes 1d and 1d for detecting the index of the magnetic disk, and on the tip side. One head window le, le is formed in the center of the magnetic head, through which the magnetic head slides into contact with the magnetic disk.

A barcode label 3a that records information in a striped pattern.

3b is attached, and side A of cassette 1 is attached to the rear end.

Labels 4a and 4b each having a display on eight sides or the like are joined together.

The above-described cassette 1 is inserted and mounted in the disk drive 5 whose main part is shown in FIG. 2, for example, in the direction of arrow A with the side A facing down.

In the configuration of the disk drive 5, reference numerals 6 and 6 refer to cassette guides, which have a guide groove 6af for guiding the cassette 1 and are fixed on the base plate 7. A spindle 8 for rotating the magnetic disk is fitted into the center of the base plate 7, and this spindle is connected to a drive motor (not shown).

10 denotes a carriage, and a magnetic head 11 is mounted on the top surface of the carriage, and the magnetic head is placed in a position where it can slide against the bottom surface of the magnetic disk 2 through the head window 1d on the bottom side of the cassette 1. It is arranged to be movable in the directions of arrows B and C.

Three steel bells 12a and 12b are strung on the side of the carriage 10, and the outer two steel bells 12a are pulleys connected to the drive shaft of a stepping motor 13 for driving the carriage. 14
is wrapped around.

The configuration of the parts described above is the same as the conventional one, but in this embodiment, the above-mentioned barcode label 3a.

The carriage 10 is provided with optical reading means for reading the symbol information 3b.

That is, a support plate 15 protruding to the right in the figure is fixed to the lower surface of the leading end of the carriage 10, and a reading element 1-6 is fixed on this support plate 15. This reading element 16
consists of a phototransistor 16a which is an optical detection element and a light emitting diode 16b which is a light emitting element.

The phototransistor 16a and the light emitting diode 161) are connected to a reading circuit shown in FIG.

In the same circuit, the anode side of the light emitting diode 16b is connected to the power supply +■, and the cathode side is grounded through a resistor R1, which is a current limiting material. In addition, the collector of the phototransistor 16a is connected to the power supply +■,
The emitter is grounded via a resistor R2 and connected to the amplifier circuit 17.

Also, at the downstream stage of the amplifier circuit 17 is an output terminal 1 of the reading circuit.
A comparison circuit 18 connected to 9 is connected.

Here, in FIG. 3, reference numeral S1 indicates a read signal of the phototransistor 16d, reference symbol S2 indicates an amplified signal that is the output of the amplifier circuit, and reference symbol S3 indicates the read output signal that is the output of the comparator circuit.

Next, the operation of this embodiment having the above configuration will be explained.

At the time of installation (d), the cassette 1 is inserted into the disk drive 5 as shown by the arrow 1 in FIG. The magnetic disk 2 is clamped via the center hole 1c+1c of the magnetic disk 1 and the center hole 2.a of the magnetic disk 2.

When reading the recorded information on the barcode labels 3a, 31) of the cassette 1 mounted in the above manner, a predetermined voltage is first applied from the power supply +V to the phototransistor 1681 and the light emitting diode 16b of the reading element 16.
The light emitting diode 16b emits light and the stepping motor 13 is rotationally driven.

Here, in the initial position of the carriage 10, the magnetic reading element 16 is inserted into the barcode label 3 (not shown in FIG. 2).
It is located opposite the outer edge of a.

When the 1-drive pulley 14 of the stepping motor 13 rotates in the direction of arrow 1) in FIG. 2, the outer steel belt 12a wound around the pulley 14 is unwound, pushing the carriage 11 in the direction of the arrow. Move to. As a result, the light emitting diode 161J moves along the thorny surface of the barcode label 3a from its outer end to its inner end.

At this time, the reflected light of the light emitting diode 16b received by the first transistor tea changes depending on the striped pattern of the barcode label 3a, and due to this change, the current flowing to the emitter of the phototransistor 16i1 changes fL, as shown in FIG. (
A read signal s1 indicated by al is guided to the amplifier circuit 17.

The read signal S1 is output by the amplifier circuit 17 (Fig. 4 (1))
It is amplified into the amplified signal s2 shown in FIG. A converted read output signal S3 is formed and output to the output terminal 19.

By this read output signal S3, the bar code label 3
The recorded information of a is read.

When reading is completed, the power to the reading element 16 is cut off and the stepping motor 13 is rotated in the opposite direction as described above, so that the carriage 10 moves in the direction of arrow C in FIG. 2 and returns to the initial position. .

After that, record 3 of the barcode label 3a read earlier.
Recording and reproducing operations are performed based on the retention information.

During recording and reproduction, the carriage 10 is moved from the initial position in the direction of arrow B by the rotational drive of the stepping motor 13, so that the one-track head 11 comes into sliding contact with the magnetic disk 2 through the head window 1e, and the magnetic disk 2 is rotated. Recording and playback are performed.

In the above embodiment, the barcode labels 3a and 3b were used as recording means for the information on the cassette 1, and the information was read by the optical reading element 16, but this is the recording means and the reading means. It is not limited to
For example, a magnetic Teak label and a magnetic reading element may be used.

Furthermore, the recording means described above may be capable of recording new information, and information recording means may be provided in addition to the reading means on the carriage side. With this configuration, saving information and the like can be recorded on the cassette by input from the host system side of the magnetic disk device, and the magnetic disks can be managed more efficiently.

Effects As is clear from the explanation in Section 2, according to the present invention, in a magnetic disk device using a magnetic disk housed in a case, a means for reading recorded information on the case is provided in a carriage for transporting the magnetic head. Therefore, with a simple and inexpensive configuration without the need to provide a new mechanism,
Information on the case can be read even after the case is attached to the device. Furthermore, if a means for recording information on the case is provided in addition to the above-mentioned reading means, the magnetic disk can be managed more efficiently.

[Brief explanation of drawings]

Each figure is for explaining one embodiment of the present invention. FIG. 1 is a perspective view of a magnetic disk cassette, FIG. 2 is a perspective view showing the configuration of main parts of a magnetic disk cassette and a magnetic disk device, and FIG. 4 is a block circuit diagram showing the configuration of the reading circuit, and FIGS. 4(a) to 4(C) are signal waveform diagrams showing the signals of each part of the reading circuit of FIG. 3 during the reading operation.1... Magnetic disk cassette 2...Magnetic disks 3a, 3b, barcode label 5...Disk drive 10, carriage 11...Magnetic head 16...Reading element +68...Phototransistor 16b...
- Light emitting diode 17...Amplification circuit 18...Comparison circuit. Patent applicant Canon Electronics Co., Ltd.

Claims (1)

[Scope of Claims] l) A magnetic disk device that records and reproduces information by bringing a magnetic head into sliding contact with a magnetic disk housed in a case, in which information is recorded on the case. 2) The magnetic disk device according to claim 1, wherein the carriage is provided with means for recording information on the case.