JPH0896544A - Optical disk drive - Google Patents

Abstract

(57) [Summary] [Object] It is an object of the present invention to provide an optical disk device which can be thinned without causing interference between an optical head and a disk cartridge. A shutter opening / closing mechanism 64a is provided for opening the shutter according to the movement of the disk cartridge when the disk cartridge is inserted along a predetermined insertion direction from an insertion opening to a predetermined loading position in a housing. .
The shutter opening / closing mechanism includes an engaging member 72, and the engaging member includes a claw portion 80 that engages with a sliding pin of the inserted disk cartridge, and a locking protrusion 78 that restricts movement of the engaging member.
have. While the disk cartridge moves to the middle position where the shutter 22 is completely opened,
It is held in the initial position by the locking projection, and after opening the shutter,
It is moved with the disc cartridge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device for recording and reproducing information on an optical disk as a recording medium, and more particularly to an optical disk device provided with a shutter opening / closing mechanism for opening / closing a shutter of a disk cartridge accommodating an optical disk. .

[0002]

2. Description of the Related Art Generally, a disk cartridge loaded in an optical disk device has a flat rectangular case,
An optical disk is stored in this case. Openings are formed on the upper surface and the lower surface of the case to expose the internal optical disk. When the disc cartridge is loaded in the optical disc device, the optical head of the optical disc device accesses the optical disc through these openings.

Further, the disc cartridge is provided with a slidable shutter that opens and closes the opening of the case in order to prevent dust from entering the case and damage to the optical disc. In response to this, the optical disk device includes a shutter opening / closing mechanism for opening / closing the shutter of the loaded disk cartridge.

For example, in the case of a phase change type disk cartridge, a slidable pin is provided on the side surface of the case, and the shutter is connected to this pin via a belt.
Further, the shutter opening / closing mechanism of the optical disk device has a fixed engaging claw provided on the side wall of the cartridge holder. When the disc cartridge is inserted into the cartridge holder, the pin of the disc cartridge is caught by the engaging claw, and the shutter is opened in association with the inserting operation of the disc cartridge.

After the disc cartridge is inserted to a predetermined position and the shutter is completely opened, the disc cartridge is lowered together with the cartridge holder. As a result, the optical disc in the disc cartridge is placed on the turntable of the spindle motor, and information processing on the optical disc becomes possible.

On the other hand, in recent years, it has been desired that the optical disc device be made thinner in view of the market needs. Therefore, in order to realize such thinning, there is provided an optical disk device of a system in which a spindle motor is moved up and down with respect to an optical disk after the disk cartridge is inserted without moving the disk cartridge up and down.

[0007]

However, when the above-described shutter opening / closing mechanism is combined with the optical disk device of the type in which the spindle motor is moved up and down, the following problems occur. That is, in general, the optical head of the optical disk device needs to be positioned to face the mounted optical disk at an interval of several millimeters during information processing. After that, the relative position between the disk cartridge and the optical head does not change. Therefore, when the disc cartridge is inserted to a predetermined position, the disc cartridge passes very close to the optical head.

However, in the case of the shutter opening / closing mechanism using the fixed engaging claw described above, the shutter is completely opened when the disc cartridge reaches a predetermined mounting position after the disc cartridge is inserted. . Therefore, when the disk cartridge passes over the optical head, the shutter is not yet fully opened,
This shutter interferes with the optical head. In this case, the optical head and the disk cartridge may be damaged.

The present invention has been made in view of the above points, and an object thereof is to provide an optical disk device which can be made thin without causing interference between the optical head and the disk cartridge.

[0010]

In order to achieve the above object, a case which accommodates an optical disk and is provided with an opening for exposing a part of the optical disk, and the opening provided slidably in the case And a shutter that opens and closes, and is slidably provided on the side surface of the case,
In an optical disc device using a disc cartridge provided with a sliding pin that is connected to the shutter via a belt and slides in conjunction with the shutter, the optical disc device according to claim 1 of the present invention has the disc cartridge inserted therein. A housing having a possible insertion opening and the shutter is opened according to the movement of the disk cartridge when the disk cartridge is inserted from the insertion opening to a predetermined loading position in the housing along a predetermined insertion direction. A shutter opening / closing mechanism, an optical head for performing information processing on the optical disc in the disc cartridge inserted to the loading position through the opening, and an optical disc in the disc cartridge inserted to the loading position for rotational driving. Drive means for

The shutter opening / closing mechanism has a claw portion that engages with the sliding pin while the disc cartridge moves from the insertion opening to the loading position, and has an initial position adjacent to the insertion opening. The engaging member provided so as to be movable between an initial position and a terminal position separated in the insertion direction, and the engaging member while the disk cartridge is inserted up to an intermediate position where the shutter is completely opened. And a regulation unit that holds the initial position and allows the engagement member to slide to the end position while the disc cartridge is inserted from the midway position to the loading position.

According to a second aspect of the present invention, there is provided an optical disk device having a housing having an insertion opening through which the disk cartridge can be inserted, and a predetermined inside of the housing from the insertion opening along the predetermined insertion direction of the disk cartridge. When the disc cartridge is inserted to the loading position, the shutter opening / closing mechanism that opens the shutter according to the movement of the disc cartridge, and the optical disc in the disc cartridge inserted to the loading position are processed through the opening. And an optical head for driving the optical disk in the disk cartridge inserted in the loading position, a driving position for engaging the optical disk in the disk cartridge, and a driving position for separating the driving means from the optical disk. And a moving means for moving to and from the retracted position.

The shutter opening / closing mechanism has a claw portion that engages with the sliding pin while the disk cartridge moves from the insertion opening to the loading position, and has an initial position adjacent to the insertion opening. The engaging member provided so as to be movable between an initial position and a terminal position separated in the insertion direction, and the engaging member while the disk cartridge is inserted up to an intermediate position where the shutter is completely opened. And a regulation unit that holds the initial position and allows the engagement member to slide to the end position while the disc cartridge is inserted from the midway position to the loading position.

[0014]

According to the optical disk device of the first aspect of the present invention, the sliding pin of the disk cartridge is engaged with the shutter opening / closing mechanism when the disk cartridge is inserted into the housing through the insertion opening. It engages with a claw provided on the member. At this time, the engagement member is held at the initial position adjacent to the insertion port by the restriction means. Therefore, when the disc cartridge is further inserted toward the predetermined loading position, the sliding pin is prevented from moving by the claw portion of the engaging member, and only the disc cartridge moves.
As a result, the shutter is opened via the belt.

Then, when the disc cartridge is inserted up to the middle position where the shutter is completely opened, the holding of the engaging member by the restricting means is released, and thereafter the engaging member reaches the predetermined loading position of the disc cartridge. It is moved with the disk cartridge until it is done.

As described above, when the disc cartridge is inserted from the insertion opening to the loading position, the shutter of the disc cartridge is completely opened by the shutter opening / closing mechanism before reaching the loading position. That is, when the disk cartridge passes over the optical head, the shutter is already open. Therefore, at the time of insertion, it is possible to prevent interference between the optical head and the disk cartridge, particularly interference between the optical head and the shutter.

Further, according to the optical disk device of the second aspect of the present invention configured as described above, while the disk cartridge is being inserted from the insertion port to the loading position, the drive means is in the retracted position, that is, the disk cartridge. The disk cartridge is held at a position separated from the moving path, and after the disk cartridge is inserted to the loading position, it is moved by the moving means to the drive position for engaging the optical disk.

Therefore, as compared with an apparatus in which the disk cartridge is lowered to a position where it is engaged with the drive means after insertion, the overall apparatus can be made thinner, and at the same time, the optical head and the disk when the disk cartridge is inserted. Interference with the cartridge can be prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk device according to an embodiment of the present invention will be described in detail below with reference to the drawings. First,
Before describing the optical disc device, the configuration of the disc cartridge applied to the optical disc device according to the present embodiment will be described.

As shown in FIGS. 1 and 2, the disc cartridge 10 is an optical disc 1 as an information recording medium.
It is provided with a flat rectangular case 12 accommodating four.
Openings 16 for accessing the optical disk 14 are formed on the upper surface and the lower surface of the case 12, respectively. Each opening 16 extends from substantially the center of the upper surface or the lower surface of the case 12 toward the insertion direction A of the disc cartridge 10 to the vicinity of the front end surface of the case. A hub 20 having a center hole 20 is attached to the center of the optical disc 14.

The case 12 is provided with a double-sided shutter 22 slidably, and the shutter opens and closes the opening 16. The shutter 22 is constantly urged by a spring (not shown) provided in the case 12 toward the closed position of FIG.

On the front end surface of the case 12 and the side surface 12a located on the shutter opening side, from the vicinity of the opening 16 to the side surface 1
A groove 24 is formed that extends to approximately the middle of 2a. Further, inside the groove 24, a sliding pin 30 slidable along the side surface 12 a and a belt 28 connecting the sliding pin 30 and the shutter 22 are provided. Therefore, by sliding the sliding pin 30 in the direction opposite to the insertion direction A, the shutter 22 is pulled via the belt 28 and moved to the open position shown in FIG.

Further, recesses 32 and 33, which form a part of the restricting means in the present invention, are formed in the intermediate portions of the side surface 12a and the other side surface 12b of the case 12, respectively. Further, a groove 26 extending from the vicinity of the recess 33 to the front end surface of the case 12 is formed on the side surface 12b.

As shown in FIGS. 3 and 4, the optical disk device includes a rectangular housing 40, and an insertion opening 46 for the disk cartridge 10 is formed in the front surface 41 of the housing. A partition wall 42 is provided in the housing 40 so as to extend between an upper wall and a bottom wall 44 of the housing and in parallel with these, and the partition wall extends from the insertion port 46 to the rear wall of the housing. Also, the partition wall 4
An opening 43 that communicates the upper and lower spaces of the partition wall is formed in the central portion of 2.

On the partition wall 42, a cartridge holder 66 for guiding and holding the disc cartridge 10 inserted in the housing 40 through the insertion port 46 at a predetermined loading position.
Is provided. The cartridge holder 66 is attached to each wall 4
2 includes a pair of guide walls 70 standing upright, and a pair of upper plates 67 (only one of which is shown) extending inward from the upper ends of the guide walls in parallel with the partition walls 42. The guide walls 70 are separated from each other by a length substantially equal to the width of the disc cartridge 10 and extend along the disc cartridge insertion direction A. Therefore,
Disk cartridge 1 inserted through the insertion slot 46
Zero is positioned and guided in the horizontal direction by the pair of guide walls 70, and positioned and guided in the vertical direction by the partition wall 42 and the upper plate 66. In addition, inside the guide wall 70, shutter opening / closing mechanisms 64a and 64b to be described later are provided, respectively.

Below the partition wall 42, at a portion facing the opening 43, a spindle motor 58 for rotationally driving the optical disc 14 in the disc cartridge 10 inserted at a predetermined loading position, and recording information on the optical disc 14, An optical head 51 for reproducing, erasing, etc. is provided.

The spindle motor 58 functioning as a driving means comprises a turntable 61 fixed to the upper end of the spindle shaft 68a, and the optical disk 14 is mounted on the turntable with the hub 18 magnetically attracted to the turntable. To be done.

Further, the spindle motor 58 has a housing 40.
Lifting mechanism 6 as moving means provided on the bottom wall 44 of the
With 0, the turntable 61 is moved up and down between a drive position for supporting the optical disc 14 and a retracted position for retracting the turntable 61 from the movement path of the disc cartridge 10.

The optical head 51 includes a carriage 50, an objective lens 52 supported by the carriage 50 via an elastic support 54, a laser light source (not shown) provided on the carriage, a focusing / tracking actuator, and the like. ing. The carriage 50 is provided with a pair of parallel guide rods 56 mounted on the bottom wall 44.
It is movably supported along the radial direction of the loaded optical disk 14. Then, by driving the carriage 50 with a linear motor (not shown), the objective lens 52 is moved to a position facing a desired track of the optical disc 14.

Next, the structure of the shutter opening / closing mechanisms 64a and 64b provided on the guide wall 70 will be described. Since the shutter opening / closing mechanisms 64a and 64b are symmetrically arranged and have the same configuration, only the configuration of the shutter opening / closing mechanism 64a will be described in detail as a representative.

As shown in FIGS. 4 to 6, the guide wall 7
0 is composed of an elongated lower die 70b fixed on the partition wall 42 and an elongated upper die 70a fixed on the lower die. The shutter opening / closing mechanism 64a includes an engaging member 72 slidably disposed between the upper die 70a and the lower die 70b along the insertion direction of the disc cartridge 10. The engagement member 72 includes a cam-shaped main body 74 having a predetermined thickness, a pair of guide pins 75 and 76 protruding from the upper surface and the lower surface of the main body, a claw portion 80 protruding from the side surface of the main body, and a lock. And a protrusion 78.

A recess 86 is formed at the base end of the lower mold 70b of the guide wall 70, that is, at the end on the insertion port 46 side. Further, a wide sliding groove 81 extending along the inserting direction A is formed on the upper surface of the lower mold 70b, and further, a narrow guide groove 8 extending along the inserting direction A is formed on the bottom surface of the sliding groove.
4 are formed. The base end portion 84a of the guide groove 84 is
It extends outwardly along the recess 86 with an inclination.

The upper mold 70a is formed substantially symmetrically with the lower mold 70b, and has a recess 86, a sliding groove (not shown) formed on the lower surface, and a guide groove 84. Then, with the upper die 70a fixed to the lower die 70b, the sliding groove 8
1 Comrade and the guide groove 84 are opposed to each other.
In addition, the guide wall 7 is provided between the upper mold 70a and the lower mold 70b.
A slit 90 having an opening on the inner side surface of 0 is formed, and the slit extends along the insertion direction A from the recess 86 toward the tip of the guide wall.

The main body 74 of the engaging member 72 is slidably housed in the upper and lower slide grooves 81, and the guide pins 75 and 76 are inserted in the guide grooves 84. Therefore, the engagement member 72 is slidable in the guide wall 70 along the guide groove 84. In particular, the engagement member 72 is
The guide pin 76 can be moved between an initial position (FIGS. 4 and 5) in which the guide pin 76 is located in the base end portion 84a of the guide groove 84 and an end position (FIG. 9) in which the guide pin 75 is located at the tip end portion of the guide groove. Has become.

The claw portion 80 of the locking member 72 is provided on the guide wall 70.
The slit 90 has a thickness substantially equal to the width of the slit 90, and projects toward the inside of the housing 40 from the guide wall through the slit. Similarly, the locking protrusion 80 also protrudes inside the housing 40 through the slit 90. However, the projecting end of the locking projection 78 which constitutes a part of the regulating means in the present invention is formed to have a width sufficiently larger than the width of the slit 90, and the upper and lower portions of the projecting end face the inner side surface of the guide wall 70. ing. Then, in the initial position, as shown in FIG.
As shown in FIG.
Located within 6.

Further, the shutter opening / closing mechanism 64a is provided with a compression spring 88 arranged in the sliding groove 81 of the guide wall 70, one end of which is connected to the engaging member 74 and the other end is connected to the guide wall. Is connected to the tip of. Therefore, the engaging member 72 is biased toward the initial position by the compression spring 88, and is normally held at this initial position.

Next, the operation of the optical disk device configured as described above will be described. As shown in FIG. 7, the disc cartridge 10 is inserted into the insertion opening 46 along the insertion direction A.
When the disc cartridge is inserted into the housing 40, both side surfaces of the disk cartridge move along the left and right guide walls 70, and the upper surface and the other surface move along the upper plate 66 and the partition wall 42 of the cartridge holder 67, respectively.

At this time, the shutter opening / closing mechanisms 64a, 64b
Of the engaging members 72 are located at the respective initial positions, and the claw portions 80 of the engaging members project from the guide wall 70. Therefore, as the disc cartridge 10 moves, the claws 80 enter the grooves 24 and 26 of the case 12, respectively,
In particular, the claw portion 80 of the shutter opening / closing mechanism 64a engages with the sliding pin 30 of the disc cartridge.

As shown in FIG. 8, when the disk cartridge 10 is further pushed in the inserting direction A, the sliding pin 30 moves in the inserting direction together with the case 12 and tries to press the claw portion 80 of the engaging member 72. To do. However,
In the initial position, the locking projection 78 of the engaging member 72 is located in the recess 86 of the guide wall 70 and faces the side surface of the case of the inserted disk cartridge 10. And
Even when the engaging member 72 is pressed toward the end position, the locking projection 80 abuts the side surface of the case 12 and is prevented from moving. Therefore, the engaging member 72 is held at the initial position without moving.

Therefore, the sliding pin 30 is held at the position engaged with the claw portion 30, and only the case 12 moves in the insertion direction A. As a result, the shutter 22 is pulled via the belt 28 and moves toward the open position. Then, when the disc cartridge 10 is inserted to the halfway position shown in FIG. 8, the shutter 22 is completely opened. In addition,
At the midway position, the tip of the disc cartridge 10 has not reached the objective lens 52 of the optical head 51, and therefore the shutter 22 is in a fully open state before the disc cartridge passes over the optical head.

On the other hand, when the disc cartridge 10 is inserted to the midway position, the recesses 32 and 33 formed on the both side surfaces of the case 12 respectively engage with the engaging projections 78 of the engaging member 72.
To face. At the same time, the claw portion 80 of the engaging member 72 of the shutter opening / closing mechanism 64b engages with the protrusion 26a formed in the groove 26 of the case 12. When the disk cartridge 10 is further pushed in from the midway position, the sliding pin 3
0 and the protrusion 26a press the claw portions 80 of both engaging members 72, and the engaging protrusions 78 of both engaging members are pushed into the recesses 32 and 33 of the case 12, respectively. Therefore, the movement restriction by the locking projection 78 is released, and each engagement member 72 can move from the initial position toward the end position.

While the disc cartridge 10 is being inserted from the midway position to the loading position shown in FIG. 9, each engaging member 72 is inserted.
Is moved along with the disc cartridge along the guide groove 84 from the initial position to the vicinity of the end position against the biasing force of the compression spring 88. During this time, the disc cartridge 1
0 passes over the optical head 51 when the shutter 22 is completely open. And the disk cartridge 1
When 0 is inserted into the loading position, it abuts the end of the cartridge holder 66 and is locked in the loading position by a lock mechanism (not shown).

After that, the spindle motor 58 is moved from the retracted position to the drive position by the elevating mechanism 60, and the turntable 61 of the spindle motor is engaged with the hub 18 of the optical disk 14 in the disk cartridge 10 to support the optical disk. Therefore, by driving the spindle motor 58a, the optical disk 14 can be rotationally driven at a predetermined speed.

Further, the objective lens 52 of the optical head 51
Allows access to the optical disc by facing the surface of the optical disc 14 through the opening 16 of the disc cartridge 10. Therefore, by irradiating the laser light from the objective lens 52 while the optical disc 14 is rotationally driven, information processing such as recording and reproducing is performed on the optical disc.

On the other hand, when the disc cartridge 10 is ejected from the optical disc device after the desired information processing is finished, first, the elevating mechanism 60 lowers the sprinkle motor 58 from the drive position to the retracted position, and the tentable is ejected from the optical disc 14. 61 is removed. Then, the lock of the disc cartridge by the lock mechanism is released. Then, the engaging member 72 of the shutter opening / closing mechanisms 64a and 64b is moved from the terminal position to the initial position by the compression spring 88, and accordingly, the disc cartridge 10 is pushed out from the loading position to the insertion port 46. At that time, when the disc cartridge 10 moves to the intermediate position shown in FIG. 8, the engagement between the sliding pin 30 and the claw portion 80 of the engaging member 72 is released, and the shutter 22 of the disc cartridge 10 is released.
Is moved to the closed position by the spring in the case 12.

When the disk cartridge 10 is turned inside out and inserted into the optical disk device, the shutter opening / closing mechanism 64b on the left side of the drawing opens / closes the shutter 22 of the disk cartridge by the same operation as in the above-described embodiment.

As described in detail above, according to the optical disc apparatus having the above-mentioned configuration, the disc cartridge 10 is inserted into the insertion port 4
When inserting from 6 to the predetermined loading position, the engaging members 72 of the shutter opening / closing mechanisms 64a and 64b are held at the initial position until the disc cartridge reaches the midway position, and the disc cartridge moves from the midway position to the loading position. At this time, it moves together with the disc cartridge. for that reason,
The shutter 22 may be configured to be completely opened before the disc cartridge 10 is completely pushed into the loading position, so that the shutter 22 is completely opened before the disc cartridge passes over the optical head 51. You can At the same time, when the disc cartridge 10 is ejected, the shutter 22 can be closed after the disc cartridge passes over the optical head.

Therefore, it is possible to prevent the shutter 22 from interfering with the optical head 51, particularly the objective lens 52 when the disk cartridge 10 is inserted and ejected, and to prevent the optical head and the disk cartridge from being damaged. it can. In addition, the spindle motor 58
By using the lifting mechanism 60 in combination, it is possible to realize a thin optical disc device.

The present invention is not limited to the above-described embodiments, but can be variously modified within the scope of the present invention. For example, in the above embodiment, the so-called magnet clamp system in which the hub of the optical disc is electromagnetically attracted and held by the turntable of the spindle motor has been described, but the present invention is not limited to this, and an optical disc device and a optical disc provided with a mechanical clamp mechanism. May be used.

[0050]

As described above in detail, according to the optical disk device of the present invention, when the disk cartridge is inserted into the predetermined loading position from the insertion opening, the shutter is released before the disk cartridge is completely pushed into the loading position. Can be completely opened, and as a result, the shutter can be completely opened before the disc cartridge passes over the optical head 51. Therefore, when the disc cartridge is inserted, interference between the shutter and the optical head can be prevented, and damage to the optical head and the disc cartridge can be reliably prevented. Further, by using the lifting mechanism of the spindle motor in combination, it is possible to reduce the thickness of the optical disc device.

[Brief description of drawings]

FIG. 1 is a perspective view showing a disc cartridge with a shutter closed.

FIG. 2 is a perspective view showing a disc cartridge with a shutter opened.

FIG. 3 is a sectional view of an optical disk device according to an embodiment of the present invention.

FIG. 4 is a plan view showing a state where the casing of the optical disc device is removed.

FIG. 5 is a perspective view showing a shutter opening / closing mechanism and a guide wall.

FIG. 6 is an exploded perspective view showing a shutter opening / closing mechanism and a guide wall.

FIG. 7 is a plan view of the optical disc device showing a state immediately after the disc cartridge is inserted.

FIG. 8 is a plan view of the optical disc device showing a state in which the disc cartridge is inserted up to an intermediate position.

FIG. 9 is a plan view of the optical disc device showing a state in which the disc cartridge is inserted to a loading position.

[Explanation of symbols]

10 ... Disc cartridge, 12 ... Case, 14 ... Optical disc, 16 ... Opening part, 22 ... Shutter, 28 ... Belt, 30 ... Sliding pin, 32, 33 ... Recess, 40 ... Housing,
46 ... Insertion port, 51 ... Optical head, 52 ... Objective lens,
58 ... Spindle motor, 60 ... Lifting mechanism, 64a, 6
4b ... Shutter opening / closing mechanism, 70 ... Guide wall, 72 ... Engaging member, 78 ... Locking projection, 80 ... Claw portion, 88 ... Compression spring.

Claims (4)

[Claims] 1. A case containing an optical disk and having an opening for exposing a part of the optical disk, a shutter slidably provided on the case for opening and closing the opening, and a side surface of the case. In an optical disc device using a disc cartridge, which is movably provided, is connected to the shutter via a belt, and is provided with a sliding pin that moves in conjunction with the shutter, an insert capable of inserting the disc cartridge. A housing having an opening, and a shutter that opens the shutter according to the movement of the disk cartridge when the disk cartridge is inserted from the insertion opening to a predetermined loading position in the housing along a predetermined insertion direction. For the opening / closing mechanism and the optical disc in the disc cartridge inserted to the loading position, The shutter opening / closing mechanism includes an optical head that performs information processing through the opening, and a drive unit that rotationally drives the optical disc in the disc cartridge inserted in the loading position. A claw portion that engages with the sliding pin is provided while moving to the loading position, and is provided so as to be movable between an initial position adjacent to the insertion opening and an end position separated from the initial position in the insertion direction. The engaged member is held at the initial position while the disc cartridge is inserted to the halfway position where the shutter is completely opened, and the disc cartridge is held from the halfway position to the loading position. An optical disk device comprising: a restricting unit that allows the engagement member to move to the end position while being inserted. 2. A case for accommodating an optical disk and having an opening for exposing a part of the optical disk, a shutter which is manually provided in the case to open and close the opening, and moves to a side surface of the case. In an optical disk device using a disk cartridge, which is freely provided, is connected to the shutter via a belt, and has a sliding pin that slides in conjunction with the shutter, insertable for inserting the disk cartridge. A housing having an opening and a shutter opening / closing for opening the shutter according to the movement of the disk cartridge when the disk cartridge is inserted from the insertion opening to a predetermined loading position in the housing along a predetermined insertion direction. The mechanism and the optical disc in the disc cartridge inserted to the loading position, An optical head for performing information processing through the opening, drive means for rotationally driving the optical disc in the disc cartridge inserted in the loading position, drive position for engaging the drive means with the optical disc in the disc cartridge, A shutter opening / closing mechanism that engages with the sliding pin while the disc cartridge moves from the insertion opening to the loading position. An engaging member that has a claw portion and is movable between an initial position adjacent to the insertion opening and an end position separated from the initial position in the insertion direction, and the shutter is completely opened. From the middle position to the loading position, the engaging member is held at the initial position while the disc cartridge is inserted to the position. While serial disk cartridge is inserted, the optical disk apparatus characterized by comprising: a regulating means for allowing the sliding of the engaging member to the end position. 3. The restricting means restricts the movement of the engaging member by abutting the side surface of the disc cartridge while the disk cartridge is projected from the engaging member and moves from the insertion opening to the midway position. A locking projection, and a recess formed on the side surface of the disk cartridge for receiving the locking projection and allowing the engagement member to move when the disk cartridge is inserted to the midway position. The optical disk device according to claim 1, wherein the optical disk device is an optical disk device. 4. The shutter opening / closing mechanism includes an urging means for urging the engagement member toward the initial position, according to any one of claims 1 to 3. Optical disk device.