JP2894405B2 - Flexible disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible disk drive, and more particularly to a condition for performing a disk discharge operation of a flexible disk drive having a disk discharge mechanism.

[0002]

2. Description of the Related Art FIG. 7 and FIG.
FIG. 7 is a diagram showing a disk mounting / dismounting mechanism and a switch for detecting its state in the disk drive. FIG. 7 includes a medium detection switch for detecting mounting of a disk cartridge, and FIG. Are provided with a disk attachment / detachment mechanism position detection switch for detecting that the disk is in the mounted state. A flexible disk drive of the type shown in FIG. 7 is disclosed, for example, in Japanese Patent Application Laid-Open No. 3-17861.

In the figure, 1 is a storage medium, 2 is a disk cartridge for storing the storage medium 1, and 3 is a storage medium 1.
A chucking plate for fixing the storage medium 1; a chucking plate for engaging with the chucking hub 3; and a spindle 5 for generating a force for rotating the storage medium 1 through the chucking hub 3. ·motor,
Reference numeral 6 denotes a disk mounting / dismounting mechanism for mounting or ejecting the disk cartridge 2, 7 a base, 8 a medium detection switch (hereinafter abbreviated as a disk-in switch) for detecting the mounting of the disk cartridge 2, and 9 a disk-in switch. A detection rod 10 of the switch 8 is a disk attachment / detachment mechanism position detection switch (hereinafter abbreviated as a cassette holder-in switch) for detecting that the position of the disk attachment / detachment mechanism 6 is at the position where the disk cartridge 2 is mounted. , 11 is a detection rod of the cassette holder-in switch 10, and 12 and 13 are output signal lines of the disk-in switch 8 and the cassette-holder-in switch 10, respectively. DKI) and a cassette holder-in signal (hereinafter abbreviated as CHI).

Next, the operation will be described. In FIG. 7, when the disk cartridge 2 is not mounted, the chucking hub 3 and the chucking plate 4 are not combined with each other because the disk attaching / detaching mechanism 6 is separated from the base 7. 9 is disk cartridge 2
Not pushed by. Accordingly, the disk-in switch 8 detects that the disk cartridge 2 is not mounted, and the DKI 12 becomes logic "0".

Here, when the disk mounting / dismounting mechanism 6 approaches the base 7 and the disk cartridge 2 is mounted, the chucking hub 3 and the chucking plate 4 are mounted.
And the rotational force of the spindle motor 5 is transmitted to the storage medium 1, and the detection rod 9 is pushed by the disk cartridge 2. As a result, the disk-in switch 8 detects that the disk cartridge 2 is in the mounted state, and the DKI 12 sets the logical “1”.
Becomes

In FIG. 8, the cassette holder in switch 10 detects the mounting state of the disk cartridge 2 by pressing the disk mounting / dismounting mechanism 6 and outputs it to the CHI 13 except for the difference. This is the same as the operation in FIG.

[0007]

As described above, the conventional flexible disk drive uses a disk-in-disk switch as a switch for detecting the mounted state of the disk cartridge 2.
Only one of the switch 8 and the cassette holder-in switch 10 was provided.

Now, consider a flexible disk device provided with a disk ejection mechanism (hereinafter abbreviated as an auto-ejector) for driving the disk attaching / detaching mechanism 6 when the disk cartridge 2 is ejected. In such a device,
Since the ejecting operation of the disk cartridge 2 cannot be performed manually, the disk attaching / detaching mechanism 6 moves to the position where the disk cartridge 2 is mounted due to an external impact or the like without the disk cartridge 2 being in the disk attaching / detaching mechanism 6. If an abnormal operation such as an accident occurs, the disc cartridge 2 cannot be mounted.

In order to prevent this, it is necessary to detect this abnormal state and perform an ejecting operation, and return the disk attaching / detaching mechanism 6 to the ejected position. However, in the case of the flexible disk drive having only the disk-in switch 8 shown in FIG. 7, when the discharge state of the disk cartridge 2 is detected, it is determined that there is a possibility of this abnormal state, and the discharge operation is performed. Must be executed, and even when the disk attaching / detaching mechanism 6 is in the position of the correct ejection state and the ejection operation is not necessary again, an unnecessary ejection operation is performed. Further, in the case of the flexible disk device having only the cassette holder-in switch 10 shown in FIG. 8, when the mounting state position of the disk attaching / detaching mechanism 6 is detected, it can be determined that there is a possibility of this abnormal state. At the time, a normal operation and an abnormal operation cannot be distinguished from each other, and the discharging operation must not be performed at the normal time. Therefore, the discharging operation cannot be performed.

As described above, in the conventional flexible disk device with an auto ejector, the disk mounting / dismounting mechanism 6 moves to the position where the disk cartridge 2 is mounted without the disk cartridge 2 being in the disk mounting / dismounting mechanism 6. Since an abnormal state such as movement cannot be correctly detected, the disk cartridge 2 cannot be mounted, or an unnecessary ejection operation has to be performed to prevent this. There is a problem that it is disadvantageous in terms of power consumption, device life, and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an apparatus capable of correctly detecting the above-mentioned abnormal state and executing an appropriate discharge operation.

[0012]

According to a first aspect of the present invention, there is provided a flexible disk drive having both a disk-in switch and a cassette holder-in switch , wherein a disk-in switch and a cassette are provided . ·holder
-Combining the state of the in-switch and auto-
Ekuta are those you so that to drive the.

According to a second aspect of the present invention, there is provided a flexible disk device for detecting a disk-in switch .
Is provided with a delay circuit .

According to a third aspect of the present invention, there is provided a flexible disk drive provided with a delay circuit for detecting a cassette holder-in switch.

According to the fourth aspect of the present invention, there is provided a flexible disk apparatus which is capable of performing disk-in-disk operation when power is turned on.
Check the status of the switch and cassette holder in switch.
A delay circuit is provided on the
This is to drive the cubicle .

[0016]

[0017]

In the present invention, the disk-in switch 8 is used.
Detects that the disc cartridge 2 has been ejected, and detects that the cassette holder-in switch 10 has detected the mounted state of the disc attaching / detaching mechanism 6 as an abnormal state, and executes an appropriate ejecting operation. Act on.

[0018]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an embodiment of a flexible disk drive provided with both a disk-in switch 8 and a cassette holder-in switch 10, and the numbers in the figures are the same as those in FIGS. 7 and 8. Represents FIG.
FIG. 2 shows a case where the disk cartridge 2 is in the disk attaching / detaching mechanism 6, and FIG. 2 shows a case where the disk cartridge 2 is not in the disk attaching / detaching mechanism 6, respectively.

FIG. 3 is a schematic diagram of the disk drive shown in FIGS.
FIG. 4 is a block diagram of an electric circuit for determining the abnormal state from signals detected by the in-switch 8 and the cassette holder-in switch 10 and executing an appropriate discharge operation. , And outputs a logic '1', 15 is an inverter, 16 is an AND gate, and 17 and 18 are the times t ₁ and t from the rising point of the input signal to the rising point of the output signal, respectively. Rising delay timer that delays by ₂ ; 19, 20, 21 are D-type flip-flops;
2 is an OR gate, 23 is an auto ejector, 24 to 2
7, a signal line; 24, a power-on detection circuit 14;
An output signal line (hereinafter abbreviated as PWRON) 25 is a discharge operation start signal line (hereinafter referred to as a PWRON) to the auto-ejector 23.
EJE), 26 and 27 are output signal lines of rising delay timers 17 and 18 (hereinafter DLYCH).
I, DLYDKI). 8,10,
Reference numerals 12 and 13 denote the same components as those in FIG.

Next, the operation will be described. In FIG. 1, when the disk cartridge 2 is not mounted, the detection rod 9 is not pushed by the disk cartridge 2 and the detection rod 11 is not pushed by the disk attaching / detaching mechanism 6, and both the DKI 12 and the CHI 13 are logically pushed. '0' is output. When the disk cartridge 2 is in the mounted state, the detection rod 9 is pushed by the disk cartridge 2 and the detection rod 11 is pushed by the disk attaching / detaching mechanism 6, respectively, and a logical "1" is output to both the DKI 12 and the CHI 13. .

Here, a case where the disk cartridge 2 is not in the disk loading / unloading mechanism 6 and the above-mentioned abnormal state in which the disk loading / unloading mechanism 6 is at the position where the disk cartridge 2 is mounted will be described with reference to FIG. In this case, the detection rod 9 is not pushed because there is no disk cartridge 2, but the detection rod 11 is pushed by the disk attaching / detaching mechanism 6. As a result, "0" is output to the DKI 12 and "1" is output to the CHI 13, so that an abnormal state can be determined by this combination.

Next, a method of judging the abnormal state and executing an appropriate discharging operation will be described with reference to FIG.
4 to 6 show time charts of the signals of the respective parts in FIG.

FIG. 4 shows a state of determining an abnormal state at power-on (the disk cartridge 2 is not mounted on the disk mounting mechanism 6 and the disk mounting mechanism 6 is in the mounted state of the disk cartridge 2). , DKI1
2 and the CHI 13 are logic '0' and logic '1', respectively, and if the PWRON 24 becomes logic '1', the D-type flip-flop 19 is set. 'And auto
Activate the ejector 23.

FIG. 5 shows a state in which the disk mounting / dismounting mechanism 6 determines an abnormal state in which the disk mounting / dismounting mechanism 6 has moved to the position where the disk cartridge 2 is mounted due to impact or the like without the disk cartridge 2 in the disk mounting / removing mechanism 6. At this time, the DKI 12 remains at logic "0" and the CHI 13 remains at logic "1". If disk cartridge 2
Is to be inserted into the disk attaching / detaching mechanism 6, DKI1
2 should be a logic "1" within a disk cartridge insertion after a certain variation in time t _1. Accordingly disk detaching mechanism 6, DLYCHI the position of the mounting state of the disk cartridge 2 in a certain time t after ₁ after reaching
If DKI remains at logic "0" when 26 becomes logic "1", the D-type flip-flop 20 is set, and this output signal is passed through OR gate 22 to EJE2.
5 is set to logic "1" to drive the auto ejector 23.

FIG. 6 shows that the disk cartridge 2 is released from the mounted state by an impact or the like.
Shows a state in which an abnormal state is determined in which the position of the disc cartridge remains in the mounted state. At this time, CHI1
3 remains at logic "1" and DKI 12 remains at logic "0". If the discharge operation is normal, the CHI 13
It should be a logic "0" within the scope of the discharge operation starts after a certain variation time t _2. Therefore, DKI1 due to impact etc.
2 DLYD from when the logic "0" after a certain period of time t ₂
If the CHI 13 remains at the logic "1" when the KI 27 becomes the logic "1", the D-type flip-flop 21 is set.
The JE 25 is set to logic “1” and the auto-ejector 23
Drive.

[0026]

As described above, according to the present invention, both the disk-in switch 8 and the cassette-holder-in switch 10 are provided, and the disk cartridge 2 and the disk Since an appropriate discharging operation is enabled by detecting an abnormal state of the attachment / detachment mechanism 6, there is an effect that the reliability, operation speed, power consumption, and life of the device can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flexible disk device according to a first embodiment of the present invention. (With disc cartridge 2)

FIG. 2 is a diagram showing a flexible disk device according to the first embodiment of the present invention. ( Without disk cartridge 2)

FIG. 3 is a block diagram of an electric circuit for judging a mounted state of the disk cartridge 2 and starting an ejection operation of the flexible disk device according to the first embodiment of the present invention.

FIG. 4 is a view showing signal waveforms at various parts in FIG. 3; (At power-on)

FIG. 5 is a diagram showing signal waveforms at various parts in FIG. 3; (CHI13
At the time of rising)

FIG. 6 is a view showing signal waveforms at various parts in FIG. 3; (DKI12
When falling)

FIG. 7 is a diagram showing a conventional flexible disk device.
(Equipped with disk-in switch)

FIG. 8 is a diagram showing a conventional flexible disk device.
(Equipped with cassette holder-in switch)

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage medium 2 Disk cartridge 3 Chucking hub 4 Chucking plate 5 Spindle motor 6 Disk attaching / detaching mechanism 7 Base 8 Disk-in switch 9,11 Detection rod 10 Cassette holder-in switch 14 Power-on Detection circuit 15 Inverter 16 AND gate 17, 18 Rise delay timer 19-21 D-type flip-flop 22 OR gate 23 Auto ejector 12, 13, 24-27 Various signal lines

Claims (4)

(57) [Claims] 1. A disk attachment / detachment mechanism for mounting or ejecting a disk cartridge containing a magnetic disk serving as a storage medium, and the disk attachment / detachment mechanism are mounted on the disk cartridge.
Disc ejection mechanism driven during cartridge ejection operation
When, the disk cartridge, the medium detection switch for detecting that it is mounted in the disk detaching mechanism, the position of the disc removal mechanism, detects that it is in the position of the mounted state of the disc cartridge A disk attachment / detachment mechanism position detection switch is provided.
The status of the switch and the disk mounting / dismounting mechanism position detection switch
When the fixed combination is reached,
Flexible operation characterized by performing the discharge operation
Disk device. 2. A disk mounting / dismounting mechanism for mounting or ejecting a disk cartridge for accommodating a magnetic disk as a storage medium, and a medium detecting unit for detecting that the disk cartridge is mounted in the disk mounting / dismounting mechanism. switches and the position of the disc detaching mechanism is provided with a disk removal mechanism position detecting switch for detecting that at the position of the mounted state of the disc cartridge, the disc disassembling machine
The position detection switch is
A certain period of time from the point of detecting the position of the mounted state
A flexible disk device, wherein the state of the medium detection switch is detected later . 3. A disk mounting / dismounting mechanism for mounting or ejecting a disk cartridge containing a magnetic disk as a storage medium, and a medium detection detecting that the disk cartridge is mounted in the disk mounting / dismounting mechanism. comprising a switch, the position of the disc detaching mechanism, the disc removal mechanism position detecting switch for detecting that at the position of the mounted state of the disc cartridge, the medium detection switch
Switch does not detect the mounting state of the disk cartridge.
After a certain period of time from the point when the disk
A flexible disk device for detecting a state of a position detection switch . 4. A mounting disk cartridge for accommodating a magnetic disk which is a storage medium or the disk of the disk detaching mechanism and the disk detaching mechanism for discharging
Disc ejection mechanism that is driven during cartridge ejection operation
When, the disk cartridge, the medium detection switch for detecting that it is mounted in the disk detaching mechanism, the position of the disc removal mechanism, detects that it is in the position of the mounted state of the disc cartridge It includes a disc removal mechanism position detecting switch, the power-on Lise
In the initial state after loading, the media detection switch is
Detects that the disc cartridge is not loaded
The disk mounting / dismounting mechanism position detection switch
Switch is in the position where the above-mentioned disk cartridge is mounted.
Is detected via the disc ejection mechanism
Flexible operation characterized by performing the discharge operation
Disk device.