JP3370475B2 - Disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for recording or reproducing information on a disc-shaped information recording medium.

[0002]

2. Description of the Related Art In a computer, a disk drive is widely used as a large capacity and high speed information recording means. The disk drive rotates a disc-shaped information recording medium at high speed, and records or reproduces information on the recording medium using a recording / reproducing head. The types of recording media include those that can be magnetically recorded / reproduced, those that can only reproduce optical information, and those that can both record and reproduce by optical and magnetic techniques.

Such a disk-shaped recording medium (hereinafter also referred to as a disk) is generally housed in a predetermined case and protected from dust and scratches, and the whole is a disk cartridge or simply a cartridge. It is called. The cartridge is provided with a notch, that is, a window for exposing the internal recording medium and the hub at the center of the recording medium. These windows are normally closed by predetermined shutters.

When the cartridge is loaded into the disk drive for recording or reproducing information, the shutter is opened by a predetermined mechanism in the drive to allow head access and motor access to the disk. Further, the cartridge is moved to the position of the spindle motor by a predetermined loading mechanism, the hub in the center of the disk engages with the turntable of the spindle motor, and the disk rotates.

[0005]

The shutter of the cartridge is biased by a predetermined spring, and the force of this spring normally covers the access window. When the shutter is opened, a sufficient force is applied to the shutter to open the shutter, against the force of the spring and the frictional force when the shutter is slid on the cartridge case.

However, when the shutter portion is deformed due to damage or the like, the frictional force between the shutter and the case becomes large, and the shutter cannot be opened. In the conventional disk drive device, the cartridge is loaded even in such a state, the hub of the disk is attached to the rotating portion of the spindle motor, and the disk is brought closer to the recording / reproducing head. Therefore, the rotating portion of the motor and the head collide with the shutter, resulting in damage to the motor and the head on the disk drive device side, the shutter on the cartridge side, and the like.

In order to solve such a problem, it is an object of the present invention to provide a disk drive device capable of detecting the opening / closing of a shutter to improve the reliability of disk loading.

[0008]

To achieve the above object, the present invention provides a disc-shaped information recording medium, a case for accommodating the recording medium, and a part of the recording medium formed in the case exposed. A cartridge that includes an access window and a shutter that opens and closes the access window, and has a gap region formed inside the access window between a peripheral portion of the recording medium and an edge portion of the access window. In a disk drive device which is housed in a holder to record or reproduce information on a recording medium from the access window, a cartridge detecting means for generating a cartridge detection signal when the cartridge is housed at a predetermined position of the cartridge holder. And the gap in the access window of the cartridge housed in the predetermined position of the cartridge holder. First light emitting means for emitting light toward the area, and first light receiving means for receiving the reflected light and outputting a corresponding light receiving signal when the light emitted by the first light emitting means is reflected by the shutter. Means and signal generating means for generating a signal indicating that the shutter is opened when the cartridge detecting means generates the cartridge detecting signal and the first light receiving means does not output the light receiving signal. It is characterized by having.

[0009]

The present invention is also characterized in that the recording medium is a magnetic disk for magnetically recording or reproducing information. Further, the present invention is characterized in that the recording medium is an optical disc for optically recording or reproducing information. Further, the present invention is characterized in that the cartridge detecting means is a switch which is activated when pressed by a part of the cartridge. Also,
The invention is characterized in that the switch is a push button switch. Further, the present invention is characterized in that the part of the cartridge is a tip portion of the cartridge. Further, according to the present invention, the cartridge detecting means is rotatably supported at a predetermined position of the cartridge holder, and when the cartridge is inserted into the cartridge holder, an end portion thereof has a predetermined claw of the shutter. A lever for pressing and releasing the shutter while being rotated, a light-shielding piece provided on the lever, a second light receiving means, and a light emitting means for emitting light toward the second light receiving means. And the second light receiving means and the second light emitting means are arranged such that when the cartridge is accommodated in the predetermined position of the cartridge holder, The light incident on the light receiving means is blocked by the light blocking piece, and the second light receiving means is at a position where the cartridge detection signal is generated. Further, the invention is characterized in that the second light emitting means is a light emitting diode. Further, the present invention is characterized in that the second light receiving means is a phototransistor.

Further, the present invention is characterized in that the first light emitting means is a light emitting diode. Further, the present invention is characterized in that the first light receiving means is a phototransistor. Further, the present invention is characterized in that the signal generating means is a microcomputer.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the first embodiment of the disk drive device according to the present invention.
Examples will be described. Hereinafter, an optical disc drive device will be described as an example of the disc drive device according to the present invention. Before describing the drive device main body, an optical disk cartridge to be loaded in the drive device will be described first. FIG. 7 is a perspective view showing an optical disk cartridge.
A case 102 forms the outside of the cartridge 30, and an optical disk 104 as a recording medium indicated by a chain line is housed inside the case. A hub 106 is provided at the center of the optical disc 104. Cartridge 30
When loaded into the drive, the hub 106 is mounted on the turntable of the spindle motor. When the cartridge 30 is loaded into the drive device, it is inserted into the device in the direction of arrow X.

Reference numeral 108 denotes a head access window which exposes the disk 104 and allows the optical head to access the disk 104. Reference numeral 110 exposes the hub 106 and motor access which allows the spindle motor to be mounted on the turntable. It's a window. Head access window 10
8 and the motor access window 110 form a window portion 100. Such a window portion is similarly formed on the back surface of the case 102.

The shutter 112 slides on the case 102 to cover the windows 100 on both sides of the case.
The shutter 112 is biased in the Y direction by a predetermined spring (not shown), and the force of this spring normally causes the shutter to move as shown in FIG.
As shown in, the window 100 is in a closed state.

FIG. 9 is a plan view of the cartridge with the shutter opened. As can be seen from this figure, there is a predetermined clearance between the end 108a of the head access window 108 and the peripheral end 104a of the disk 104, and the opposite side can be seen through this clearance region 114. Has become.

Next, the main body of the optical disk drive will be described. FIG. 1 is a side sectional view thereof. The front panel 2 is provided with a cartridge insertion port 4, and the insertion port 4 is normally shielded by a door 6. When the cartridge 30 is mounted, the door 6 is pushed by the tip of the cartridge 30 and inserted into the apparatus. A beam 10 for mounting a light emitting element, which will be described later, is provided on a ceiling portion directly below the upper cover 8.

The driving device has a loading mechanism for arranging the cartridge 30 at a predetermined position in the device, and the cartridge holder 12 is a part of the loading mechanism and accommodates the cartridge 30 inserted through the insertion port 4. do it,
It has a function of carrying it to a predetermined position. The holder 12 is moved horizontally and vertically by a predetermined driving mechanism (not shown) including a motor, which also forms a loading mechanism.

A spindle motor 16 for rotating the disk 104 of the cartridge 30 is arranged on the base plate 14 at the bottom of the drive unit. A turntable 18 is mounted on the shaft, and when the cartridge 30 is loaded, the turntable 18 is engaged with the hub 106 of the disc 104 to rotate the disc 104 at a high speed. An optical head 21 is also arranged on the base plate 14 so as to be movable left and right in FIG. 1, and is moved by a predetermined drive mechanism (not shown) to access a necessary position on the disk 104. It is like this.

A cartridge detection switch 20, which is a switch of the present invention, is disposed on the back wall of the cartridge holder 12 at a position where the tip of the inserted cartridge abuts. The switch 20 is a push-button type switch, and when the button portion 20a is pressed, the switch 20 is turned on. This switch 2
The terminal 0 is connected to a predetermined terminal of the circuit board 24 by the flexible cable 22 and further connected to the control IC 26 on the circuit board 24.

Below the beam 10 on the ceiling in the drive,
The light emitting diode 28 which is the first light emitting means of the present invention,
It is attached with the light emitting surface facing down. To explain the position of the light emitting diode 28 on the horizontal plane, refer to FIG. FIG. 2 is a plan view showing the driving device of FIG. 1 with the upper cover 8 removed. In this figure, the cartridge 30 has been inserted into the device and held in the holder 12.
However, it is in a state immediately after the cartridge 30 is inserted into the holder 12. Therefore, the cartridge 30
Has not yet been moved to its predetermined position. The shutter 112 of the cartridge 30 is opened as shown by a predetermined opening mechanism (not shown) attached to the holder 12.

As can be seen from the drawing, the beam 10 is located slightly off the center, and the light emitting diode 28 is placed so that it overlaps the above-mentioned gap region 114 of the cartridge 30.
Is attached to. Therefore, when the tip portion of the cartridge 30 is at the end point position under the state where the detection switch in the holder is turned on, the light emitted from the light emitting diode 28 causes the gap area 114 when the shutter 112 is opened. Through to reach the opposite side of the cartridge 30. A large window 3 is provided on the upper and lower parts of the holder 12.
2 is open, and through this window 32 the access windows 108, 110 of the cartridge 30 are completely exposed.

Returning to FIG. 1, a phototransistor is provided on the base plate 14 at a position facing the light emitting diode 28.
34 is mounted with its light-receiving surface facing up. Therefore, the light emitted from the light emitting diode 28 reaches the phototransistor 34 when there is nothing to block, and the phototransistor 34 receives this light and outputs a signal indicating that the light has been received. The light emitting diode 28 is supplied with electric power from a predetermined circuit on the substrate 24. The terminals of the phototransistor 34 are electrically connected to predetermined terminals of the circuit board 24, and the control IC is connected by wiring on the board.
(Micro computer) 26.

FIG. 3 is a functional block diagram showing the control IC 26 and related elements. One end of the switch 20 is connected to the power supply V, the other end is connected to the ground through the resistor R,
It is also connected to the control IC 26. Therefore, when the switch 20 is turned on, a current flows and a voltage is generated across the resistor R. This serves as a cartridge detection signal indicating that the cartridge 30 is inserted in the holder 12.
The control IC 26 is also connected to the phototransistor 34, and when the phototransistor 34 receives a light and generates a light reception signal, receives the light reception signal. The IC 26 determines the open / closed state of the shutter 112 based on these signals, and outputs the loading command signal sl to the loading mechanism when the shutter 112 is open.

The above-mentioned loading mechanism for moving the holder 12 to the predetermined position moves the holder 12, and thus the cartridge 30, when the control IC 26 outputs the loading command signal sl, while I
When C26 does not output the loading command signal sl, the cartridge 30 is not loaded.

Next, the operation will be described with reference to FIG.
FIG. 4 is a cross-sectional view of the same kind as FIG. 1, but for the sake of clarity, only a main part is schematically shown. The same elements as those in FIG. 1 are designated by the same reference numerals. FIG. 4A shows a state immediately after the cartridge 30 is inserted from the insertion port 4 of the drive device. In this state, the cartridge 30 is not inserted all the way into the holder 12, so that the light 1 emitted from the light emitting diode 28 reaches the phototransistor 34 without interruption. Therefore, the phototransistor 34
Outputs a light reception signal. However, since the button portion 20a of the switch 20 is not pressed and the switch 20 is off, the above-mentioned cartridge detection signal is not generated. Therefore, the control IC 26 determines that the cartridge 30 is not inserted and does not output the loading command signal sl.
Therefore, the loading mechanism does not move the holder 12, and the state of FIG. 4A is maintained.

Next, the cartridge 30 is further inserted into the inside of the drive device, and as shown in FIG. 4B, the tip portion 116 pushes the button portion 20a of the switch 20, and the switch 20 is turned on. At the end point position, a cartridge detection signal (GND level) is generated. On the other hand, if the shutter 112 of the cartridge 30 is normal, the shutter 112 is gradually opened by insertion by the opening mechanism attached to the holder 12, and is completely opened at a position before the end point position described above. Become. Therefore, from the position of the light emitting diode 28, the gap area 1 of the cartridge 30 is
The phototransistor 34 can be seen through 14 (see FIG. 2), and the light 1 emitted from the light emitting diode 28 reaches the phototransistor 34. As a result, the phototransistor 34 outputs a light reception signal to the control IC 26.

At this time, the control IC 26 inserts the cartridge 30 because the cartridge detection signal is generated and the light receiving signal is input from the phototransistor 34.
Then, it is determined that the shutter 112 is properly opened, and the loading command signal sl is output.

When the loading command signal sl is output, the loading mechanism locks the position of the cartridge 30 in the holder and pulls the cartridge 30 together with the holder into the apparatus to start the loading operation. Then, the holder 12 is first moved in the X direction so that the hub 106 of the disk 104 is directly above the spindle motor 16. Next, the holder 12 is moved in the Z direction, the hub 106 is mounted on the turntable 18 as shown in FIG. 4C, and the optical head 21 shown in FIG. To do. As a result, the disk 104 rotates at a high speed, and the optical head 21
It becomes possible to read information by.

On the other hand, in the state of FIG. 4B, when the shutter 112 of the cartridge 30 is not properly opened, the light emitted from the light emitting diode 28 is reflected on the surface of the shutter 112 in the closed state. , Phototransistor 3
It does not reach 4. Therefore, the phototransistor 34 does not output the light reception signal. Therefore, the control IC 26 determines that the shutter 112 is not open because the light receiving signal is not input although the cartridge 30 is mounted, and does not output the loading command signal sl. Therefore, the loading mechanism does not move the holder 12 at all. Therefore, the shutter 112 does not collide with the turntable 18 of the motor 16 or the optical head 21 as in the conventional case, and damage to them is prevented.

Next, the second embodiment will be described. Figure 5
FIG. 6 is a side sectional view showing an optical disk drive device according to a second embodiment. This optical disk drive differs from the optical disk drive of FIG. 1 in that the position of the phototransistor is
At two points of the control IC. Since the other parts are the same, description of the same parts will be omitted here.

Unlike the phototransistor 34, the phototransistor 35 is not on the base plate 14 but on the beam 1.
On the lower side of 0, it is attached adjacent to the light emitting diode 28. The terminal is connected to a predetermined terminal on the circuit board 24, and is connected to the control IC 27 by wiring on the board. In this case as well, the switch 20 is connected to a predetermined terminal on the circuit board 24 by the flexible cable 22. Then, as in the case described above, one end of the switch 20 is connected to the power supply, the other end is connected to the ground through the resistor, and further connected to the IC 27. Therefore, when the switch 20 is turned on, a voltage is generated across the resistor as a cartridge detection signal and is input to the control IC 27.

In this embodiment, the control IC 27 operates as follows to generate the shutter open signal sl. FIG. 6 is a view corresponding to FIG. 4B and schematically shows a state in which the cartridge 30 is housed in the holder 12. The case where the shutter 112 is normal will be described with reference to this drawing as well. At this time, when the cartridge 30 is inserted up to the insertion end point position at the back of the holder 12, the button portion 20a of the switch 20 is pressed and the switch 20 is turned on. as a result,
A cartridge detection signal is generated. On the other hand, the shutter 11
Since 2 is open, the light emitted by the light emitting diode 28 is directed as light 1 through the gap area 114 of the cartridge toward the bottom of the device, so that the phototransistor 35
No light is incident on the phototransistor 35 and the phototransistor 35 does not generate a light reception signal. That is, in this embodiment, the shutter opening is detected when the light receiving signal is not generated.

Therefore, the control IC 27 controls the cartridge 3
When 0 is inserted and the shutter 112 is correctly opened, a loading command signal is output. As a result, the loading mechanism moves the holder 12 in the X and Z directions and positions the cartridge 30 at a predetermined position, as in the above-described embodiment. As a result, the hub 106 of the disk 104 will not rotate with the turntable 18 of the motor 16.
Mounted on the disk 104, the disk 104 rotates, and the optical head 2
No. 1 can also access the disk 104.

On the other hand, when the shutter 112 has an abnormality and is not properly opened, the light emitted from the light emitting diode 28 is reflected by the shutter 112 in the closed state and is incident on the phototransistor 35 as reflected light l '. To do. Therefore, the phototransistor 35 outputs a light reception signal to the control IC 27. Then, the control IC 27 determines that the shutter 112 of the cartridge 30 is not properly opened because the light receiving signal is input from the phototransistor 35 although the switch 20 is turned on and the cartridge detection signal is generated. Does not generate loading command signal. Therefore, the loading mechanism does not move the holder 12 at all. Therefore, the shutter 112 is not required to drive the motor 16 as in the conventional case.
It does not collide with the turntable 18 or the optical head 21 and their damage can be prevented.

Next, a third embodiment will be described. Figure 1
0 and FIG. 11 are perspective views showing the main parts thereof. This embodiment differs from the above-mentioned first embodiment in the cartridge detecting method, and a photo interrupter is used instead of using the switch 20. Since the other points are the same, the description of the same parts will be omitted here. FIG. 10 shows a state immediately after the cartridge 30 is inserted into the cartridge holder 12. Reference numeral 124 denotes a shaft attached at a predetermined position in the back of the holder 12,
The lever 120 is rotatably supported by the shaft 124 at its end. At the other end of the lever 120, a tip portion 120a is bent downward at a substantially right angle, and that portion engages with a claw 112a of a shutter 112 of the cartridge 30 inserted in the holder 12.
The lever 120 includes a light blocking piece 122 that projects in the rotation direction of the lever 120.

One end of the tension spring 126 is fixed to a support column 128 arranged at a predetermined position of the holder 12,
The other end is attached to the lever 120 and pulls the lever 120 toward the support column 128. The lever 12
0 is provided with a stopper (not shown), and the cartridge 3
When 0 is not loaded in the holder 12, the stopper contacts the side wall of the holder 12 and determines the limit position of the lever 120. When the cartridge 30 is inserted into the holder 12 in that state, the claw 112a of the shutter 112 is
Properly engages the tip portion 120a of the lever 120.

Therefore, when the cartridge 30 is inserted into the holder 12, the claw 112a of the shutter thereof first engages with the tip portion 120a of the lever 120. Then, when the cartridge 30 moves in the X direction, that is, toward the back of the holder 12, the lever 120 rotates counterclockwise about the shaft 124 accordingly. As a result, the claw 112a of the shutter 112 is moved by the tip portion 120a of the lever 120,
When the cartridge 30 is pushed in a direction opposite to the direction and gradually opened, and the cartridge 30 is inserted to a predetermined position in the holder 12, that is, the insertion end point position, the shutter 112 is completely opened as shown in FIG. Becomes

As shown in FIG. 11, a photo interrupter 130 is attached at a predetermined position inside the holder 12. Reference numeral 130a denotes a light emitting portion thereof, and reference numeral 130b denotes a light receiving portion thereof, each of which includes a light emitting diode and a phototransistor. The light emitting unit 130a and the light receiving unit 130b are arranged at a narrow interval, and the light receiving unit 130b receives the light from the light emitting unit 130a and outputs a corresponding signal. The position of the photo interrupter 130 is such that when the lever 120 is at the position when the shutter is opened, the light shielding piece 122 has the light emitting portion 1a.
It is a position to be inserted between 30a and the light receiving portion 130b.

Therefore, when the cartridge 30 is not inserted in the holder 12, the light shielding piece 122 is in the state shown in FIG. 10, and the light emitting portion 1 of the photo interrupter 130 is in the state.
Since the light from 30a reaches the light receiving portion 130b, the light receiving portion 130b receives this light and outputs a signal indicating that the cartridge 30 is not inserted. On the other hand, when the cartridge 30 is inserted into the holder 12 and placed at the insertion end point position, the lever 120 is rotated to rotate the light blocking piece 1.
22 enters between the light emitting portion 130a and the light receiving portion 130b of the photo interrupter 130, and as a result, the light emitting portion 130a
Since the light from is blocked and the light receiving unit 130b does not receive the light, a cartridge detection signal indicating that the cartridge 30 has been inserted up to the insertion end point position is output. The control IC 26 described above receives the cartridge detection signal, and at this time, since the light reception signal is input from the phototransistor 34, it is determined that the cartridge 30 is inserted and the shutter 112 is properly opened.
The loading command signal sl is output.

Although the light emitting diode 28 is mounted on the beam 10 of the driving device main body in the above-mentioned three embodiments,
The cartridge holder 12 may be attached at a corresponding position, and in that case, the opening / closing of the shutter 112 can be correctly detected.

In the case of the second embodiment, the shutter 112
The material of the item to reflect light as easily as possible,
Alternatively, it is desirable to process the surface so as to easily reflect the light, and thereby it is possible to more reliably detect that the shutter 112 is closed. Further, the control ICs 26 and 27 can be more specifically realized by, for example, a microcomputer.

In the above-mentioned embodiment, the optical disk drive device is taken as an example, but the present invention can be applied to a magnetic disk drive device and a magneto-optical disk drive device in addition to this, and the same effect can be obtained.

[0043]

As described above, in the present invention, when the shutter is not properly opened for some reason,
The light of the first light emitting means is reflected by the shutter, and the first light receiving means receives the reflected light and outputs a light receiving signal. Therefore, the signal generating means does not output the signal indicating the opening of the shutter. Further, in the state where the cartridge is not housed, since the light of the first light emitting means has no reflection,
Although not incident on the first light receiving means, the cartridge detecting means does not generate a cartridge detection signal, so that the signal generating means does not generate a signal indicating the opening of the shutter.

As described above, the disk drive device according to the present invention can reliably detect whether the shutter of the loaded cartridge is open. Therefore, it is possible to prevent loading of the cartridge with the shutter of the cartridge closed, and avoid damage to the drive mechanism of the recording medium, the head, or the cartridge.

[0045]

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of an optical disk drive device.

2 is a plan view showing the optical disk drive device of FIG. 1. FIG.

FIG. 3 is a functional block diagram showing a main part of the optical disk drive device of FIG.

4A, 4B, and 4C are schematic side cross-sectional views for explaining the operation of the optical disk drive device.

FIG. 5 is a side sectional view showing an example of an optical disk drive device.

FIG. 6 is a schematic side sectional view for explaining the operation of the optical disk drive device of FIG.

FIG. 7 is a perspective view showing a disc cartridge to be mounted on the optical disc drive device of FIGS. 1 and 5;

FIG. 8 is another perspective view showing a disc cartridge to be mounted on the optical disc drive device of FIGS. 1 and 5;

9 is a perspective view showing a disc cartridge to be mounted in the optical disc drive device of FIGS. 1 and 5. FIG.

FIG. 10 shows a disc inserted in the optical disc drive.
It is a perspective view showing a shutter opening mechanism of the cartridge.

FIG. 11 shows a disc inserted in the optical disc drive.
FIG. 6 is a perspective view showing a shutter opening mechanism of the cartridge and a cartridge detection mechanism using a photo interrupter.

[Explanation of symbols]

4 Cartridge insertion slot 12 Cartridge holder 20 Cartridge detection switch 28 light emitting diodes 30 cartridges 32 windows 34,35 Phototransistor 102 cases 104 optical disc 108 head access window 110 motor access window 112 shutter 114 Gap area 120 lever 122 light shield 124 axes 126 spring 130 Photo interrupter 130a light emitting unit 130b Light receiving part

─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP 62-95764 (JP, A) JP 62-165762 (JP, A) JP 61-260460 (JP, A) JP 5- 314639 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G11B 17/04

Claims (12)

(57) [Claims] 1. A disc-shaped information recording medium, a case for accommodating the recording medium, an access window formed in the case for exposing a part of the recording medium, and a shutter for opening and closing the access window. , A cartridge in which a gap region is formed inside the access window between the peripheral portion of the recording medium and the edge of the access window.
In a disk drive device housed in a holder for recording or reproducing information on a recording medium from the access window, a cartridge detecting means for generating a cartridge detection signal when the cartridge is housed in a predetermined position of the cartridge holder. And a first light emitting means for emitting light toward the clearance area of the access window of the cartridge housed in the predetermined position of the cartridge holder, and the light emitted by the first light emitting means is the shutter. When the light is reflected by, the first light receiving means for receiving the reflected light and outputting a corresponding light receiving signal; and the cartridge detecting means for generating the cartridge detecting signal, and the first light receiving means for outputting the light receiving signal. Signal generating means for generating a signal indicating that the shutter is open when not outputting; Disk drive apparatus characterized by comprising. Wherein said recording medium is magnetically disk drive apparatus of claim 1, wherein a magnetic disk for recording or reproducing information. Wherein the recording medium is optically disk drive apparatus of claim 1, wherein an optical disk for recording or reproducing information. Wherein said cartridge detecting means, the disk drive apparatus of claim 1, wherein a switch for operating when pressed by a portion of the cartridge. 5. The disk drive apparatus according to claim 4 , wherein the switch is a push button switch. 6. The disk drive device according to claim 4 , wherein the part of the cartridge is a tip portion of the cartridge. 7. The cartridge detecting means is rotatably pivotally supported at a predetermined position of the cartridge holder, and when the cartridge is inserted into the cartridge holder, an end portion thereof is a predetermined claw of the shutter. A lever that engages and rotates to press and release the shutter, a light shielding piece provided on the lever, a second light receiving unit, and a second light emitting unit that emits light toward the second light receiving unit. Light emitting means, and the second light receiving means and the second light emitting means are arranged such that when the cartridge is accommodated in the predetermined position of the cartridge holder, the second of the light incident on the light receiving means, according to claim 1 Symbol of the second light receiving means is blocked by the light shielding piece characterized in that it is a position to generate the cartridge detection signal Of the disk drive. 8. The disk drive device according to claim 7 , wherein the second light emitting means is a light emitting diode. 9. The disk drive device according to claim 7 , wherein the second light receiving means is a phototransistor. Wherein said first light emitting means disk drive apparatus of claim 1, wherein a light emitting diode. Wherein said first light receiving means disk drive apparatus of claim 1, wherein a phototransistor. 12. The method of claim 11, wherein the signal generating means disk drive apparatus of claim 1 wherein the micro-computer.