JPH04353691A - Optical disk apparatus - Google Patents

Abstract

PURPOSE:To enhance dust-proof effect of an optical disk apparatus. CONSTITUTION:Principal elements of a driving device are housed within a closed schassis member consisting of a lower schassis member 15 and an upper schassis member 16. An aperture 24 thereof is formed almost in the same size as a disk cartridge and is provided with a door member 34 in order to prevent invasion of dust from this part.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc device that positions a disc cartridge containing an optical disc at a predetermined position in a drive device using a loading mechanism.

0002

BACKGROUND OF THE INVENTION Optical disk devices that use optical disks such as optical disks and magneto-optical disks as storage media are handled with the optical disks housed in disk cartridges, and the optical disks used as recording media can be replaced as needed. .

[0003] In such a medium exchange type optical disk device, since the device is equipped with a loading mechanism and an ejecting mechanism for exchanging the disk cartridge, there are many places where the inside of the device communicates with the outside air, and therefore, outside air is freely allowed inside the device. flows into.

[0004] As a result, dust contained in the outside air adheres to the optical components of the optical pickup device, which disturbs the wavefront of the signal light, deteriorating the signal and causing problems such as data errors.

[0005] In order to prevent such dust from entering the inside of the optical disc device, it is conceivable to completely cover the periphery of the optical disc device.

[0006]

[Problems to be Solved by the Invention] However, inside the optical disc device, there is a laser diode used as a light source for an optical pickup device for recording/reproducing data on the optical disc, and a seeker for moving the optical pickup device in the radial direction of the optical disc. There are many sources of heat, such as the motor, the motor of the moving mechanism that moves the objective lens of the optical pickup device, the spindle motor that rotates the optical disk, and their drive circuits, so as mentioned above, the entire drive device is If the optical disk device is sealed tightly, the internal temperature of the optical disk device will rise sharply, causing problems such as exceeding the permissible temperature of the optical disk or causing significant deterioration of the device components, shortening its lifespan.

[0007] In order to suppress such a temperature rise inside the device, it is possible to forcefully cool the device by letting outside air flow into the inside of the device. Since the dust is drawn into the inside of the device, the above-mentioned problem of dust becomes conspicuous.

In order to solve this problem, the present inventor proposed ``Optical Disk Drive'' in Japanese Patent Application No. 1-246535. In this device, only the optical pickup, optical disk, and access mechanism that are susceptible to dust are sealed from the outside, and the area around them is air-cooled to prevent dust from entering the device and to protect the entire device. This is to prevent temperature rise.

However, in this conventional device, the dust-proof mechanism around the disk cartridge insertion slot is not sufficient, resulting in the inconvenience that dust enters the inside of the device from that area.

The present invention has been made in view of the above circumstances, and provides an optical disc device that can improve the dust-proofing effect around the disc cartridge insertion slot and more efficiently prevent dust from entering the inside of the device. It is intended to.

[0011]

[Means for Solving the Problems] The present invention provides a method for enclosing the outer peripheral surface of the disk cartridge at substantially the same cross-sectional position in the thickness direction of the disk cartridge, so that when the disk cartridge is completely housed in a predetermined position, the inside of the drive device is covered. It is equipped with a blocking member that substantially blocks the outside from the outside.

[0012] Also, there is provided a sealed chassis member that houses the drive device in a sealed state, and a sealed chassis member that is provided inside the sealed chassis member so that the outer circumferential surface of the disc cartridge is covered with the disc cartridge when the disc cartridge is completely housed in a predetermined position. It is provided with a blocking member that surrounds the drive device at substantially the same cross-sectional position in the thickness direction and substantially blocks the inside of the drive device from the outside.

[0013] Also, there is provided a sealed chassis member that houses the drive device in a sealed state, a door member provided inside the disk cartridge accommodating opening of the sealed chassis member, and a door member provided inside the sealed chassis member that accommodates the disk cartridge. The disc cartridge is provided with a blocking member that surrounds the outer circumferential surface of the disc cartridge at substantially the same cross-sectional position in the thickness direction of the disc cartridge when the disc cartridge is completely housed in a predetermined position, thereby substantially blocking the inside of the drive device from the outside.

[0014] Furthermore, the blocking member is composed of an elastic sealing member. The elastic sealing member is made by densely flocking a large number of threads to a base cloth.

[0015]

[Operation] Therefore, since it is possible to prevent dust from entering from around the disk cartridge, the dustproof effect can be improved.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1 and 2 show an optical disc device according to an embodiment of the present invention. Note that this optical disk device uses a magneto-optical disk as a recording medium.

In the figure, frame 1 of the optical disk device
A window 3 for inserting a disk cartridge (described later) is formed on the front surface 2 of the , and a front panel 4 is formed on the front surface 2 of the
is provided. Further, the front panel 4 is provided with a window 5 for inserting a disc cartridge, and is also provided with an eject button 6 for performing an operation to eject the stored disc cartridge.

[0019] Also, on the mounting seats 7, 8, 9, 10 (the mounting seats 8, 10 are not visible) provided at the four corners inside the frame 1, anti-vibration rubbers 11, 12, 13, 14 (vibration isolating rubbers 11, 12, 13, 14) rubber 1
2 and 14 are not visible), the lower chassis member 15 is attached thereto.

An upper chassis member 16 is fixed to the lower chassis member 15 by screws 17, 18, 19, and 20, and these lower chassis member 15 and upper chassis member 16 connect internal elements of the optical disk drive to the outside. An airtight chassis member is configured to seal the airtight airtight.

This sealed chassis member includes moving optical systems 21 and 22 disposed on both recording surfaces of a magneto-optical disk (described later), as well as moving optical systems 21 and 22 for recording/reproducing information on the magneto-optical disk (described later). A fixed optical system 23 and a moving optical system 21, 2 that constitute an optical pickup device for erasing)
A seek mechanism (not shown) for moving 2 is accommodated.

In this case, the moving optical systems 21 and 22 are provided with a uniaxial actuator that moves the objective lens in the focusing direction, and a magnetic head that applies an auxiliary magnetic field to the magneto-optical disk. , the fixed optical system 23 is provided with a galvanometer mirror mechanism for moving the laser beam in the tracking direction. Moreover, the optical axis of one of the moving optical systems 21 and 22 is connected to the optical axis of the fixed optical system 23 by this galvanometer mirror mechanism.

Further, the dimensions of the opening 24 provided in the sealed chassis for inserting the disk cartridge are set to a value approximately equal to the external dimensions of the disk cartridge.

Also, a spindle motor 25 for rotating the magneto-optical disk, and a turntable 2 for fixing the magneto-optical disk to the rotating shaft 26 of the spindle motor 25.
7, and height reference pins 28 and 29 (height reference pin 29 is not visible) for defining the height of the disk cartridge are attached to a base member 30 independent of the lower chassis member 15, The lower chassis member 15 includes
A hole 31 into which the spindle motor 25 and turntable 27 are inserted, and holes 32 and 33 (hole 33 is not visible) into which height reference pins 28 and 29 are inserted are bored.

Furthermore, various circuit boards are provided on the outside of the sealed chassis member.

As shown in FIG. 3, a door member 34 for opening and closing the opening 24 is attached to the inside of the sealed chassis member while being biased in the closing direction by a spring member 35. It is set in.

FIG. 4 shows a disk cartridge according to one embodiment of the present invention.

In the figure, a disk cartridge 36
A notch 37 is provided at the insertion end of the optical disc device to avoid the moving optical systems 21 and 22 and the turntable 27 when inserted into the optical disc device. Additionally, a magneto-optical disk 38 accommodated in the disk cartridge 36
A hub member 39 for fixing to the turntable 27 is provided at the center. Further, the shutter 40 is for opening and closing a window 41 provided in the disk cartridge 36.

With the above configuration, the disk cartridge 36
When the door member 34 is not inserted into the opening 24
Since the inside of the sealed chassis member is sealed from the outside, therefore, in this state,
Outside air does not flow through the sealed chassis member, and dust is prevented from entering into the sealed chassis member.

The disk cartridge 36 is attached to the front panel 4.
When inserted through the window 5 of the frame member 2 and the window 3 of the frame member 2 and into the opening 24 of the sealed chassis member, the tip of the disk cartridge 36 collides with the door member 34 and resists the biasing force of the spring member 35. When the disk cartridge 36 is further inserted, the door member 34 rotates and the disk cartridge 36 is inserted into the opening 24, as shown in FIG.
is inserted.

At this time, since the dimensions of the opening 24 almost match the external dimensions of the disk cartridge 36,
When the disk cartridge 36 is inserted into the opening 24 , there is no gap between the disk cartridge 36 and the opening 24 , so when the door member 34 opens the opening 24 , the disk cartridge 36 is inserted into the opening 24 .
Since this closes the opening 24, the inside of the sealed chassis member is completely cut off from the outside even in this state, and there is almost no intrusion of outside air.

When the disk cartridge 36 is inserted a certain amount from the opening 24, a loading mechanism (not shown) receives the disk cartridge 36 and guides its insertion direction, and moves the shutter 40 in the opening direction to close the window. 41 is opened, and the magneto-optical disk 38
and hub member 39 are exposed.

When the disk cartridge 36 is inserted to the specified position, the loading mechanism prohibits further insertion, and as shown in FIGS. 6 and 7, the disk cartridge 36 is positioned at the specified position. be done. Furthermore, when the positioning is completed, preparations for the loading mechanism to generate power for ejecting the disk cartridge 36, for example, the extension of the spring whose spring force is released in conjunction with the eject button 6, are completed. .

At this time, the base member 30 is in a state of being displaced downward by a vertical mechanism (not shown).
Therefore, the tip of the rotating shaft 26 of the spindle motor 25, the turntable 27, and the height reference pins 28, 2
9 is in a state of being retracted from the magneto-optical disk 38 and the hub member 39 housed in the disk cartridge 36.

Furthermore, since the notch 37 is provided at the tip of the disk cartridge 36, the tip of the disk cartridge 36 will not collide with the moving optical systems 21, 22.

Therefore, the disk cartridge 36 is guided by the loading mechanism while being inserted in the horizontal direction, and is moved and positioned to a prescribed position without colliding with the elements housed in the sealed chassis member. . Further, in this state, the door member 24 is located in the gap between the top surface of the disk cartridge 36 and the top surface of the upper chassis member 16.

Next, when the base member 30 is raised to the specified position by the vertical mechanism, the height reference pins 28 and 29
The height of the disk cartridge 36 is defined by this, and the hub member 39 is inserted into the turntable 27 and fixed to the turntable 27, whereby the magneto-optical disk 38 is rotationally driven by the spindle motor 25. becomes possible. From this point on, the moving optical systems 21 and 22 are used appropriately to move the magneto-optical disk 3.
It becomes possible to record/reproduce (/erase) data on the 8.

When accessing the magneto-optical disk 38 is completed and the eject button 6 is pushed in to take out the disk cartridge 36, the base member 30 is first moved by the vertical mechanism with the spindle motor 25 stopped.
is lowered, thereby releasing the connection between the hub member 39 and the turntable 27.

Next, the ejecting power of the loading mechanism is released, and the loading mechanism moves the disk cartridge 36 in the ejection direction, so that the end of the disk cartridge 36 opposite to the insertion side is located on the front panel 4. It stops with a certain amount protruding from the window 5.

[0040] In this state, when the user pulls out the disc cartridge 36, the disc cartridge 36 can be taken out. At that time, when the insertion side end of the disk cartridge 36 comes out of the opening 24, the disk cartridge 36 is
6 contacts the opening 24, and when the disc cartridge 36 passes through the opening 24, the door member 34 closes the opening 24, so that the airtightness of this part is maintained when the disc cartridge 36 is taken out. .

In this way, in this embodiment, it is possible to maintain the hermeticity of the portion into which the disk cartridge 36 is inserted, and it is possible to ensure the hermeticity of the hermetic chassis member.

By the way, when an external force such as vibration or impact force is applied to the optical disc device, the influence of the external force is removed by deformation of the vibration isolating rubbers 11 to 14. The amount of deformation at this time is approximately 0.5 mm, so the dimensions of the window 3 provided on the front surface 2 of the frame 1 and the window 5 provided on the front panel 4 are each set to approximately 1 mm larger values. There is.

By setting the dimensions in this way, it is possible to avoid a situation in which the sealed chassis member collides with the frame 1 when an external force is applied.

By the way, in the above-mentioned embodiment, the dimensions of the opening of the sealed chassis member are set to values that almost match the external dimensions of the disk cartridge, thereby ensuring the sealing performance of this part. Another embodiment of the means for ensuring the hermeticity of this part is shown in FIG. In addition, in the figure, the same parts and corresponding parts as in FIGS. 1 and 3 are as follows:
The same symbols are attached.

In the figure, a step 50 having the same dimensions as the opening 24 is provided inside the sealed chassis member at a position outside the rotation range of the door member 34 from the opening 24. Seal members 51 and 52 made of an elastic material are provided at the lower chassis member 15 and upper chassis member 16 portions of 50 so as to project slightly beyond the step portion 50, respectively.

Therefore, when the disk cartridge 36 is inserted, the seal members 51 and 52 come into contact with the outer surface of the disk cartridge 36, so that the hermeticity of this portion is maintained.

The seal members 51 and 52 are shown in FIG.
As shown in , a chloroprene rubber foam material or a porous elastic material whose surface is coated with hydrogen fluoride can be used.

Further, as another example of the seal members 51 and 52, as shown in FIG.
It is possible to use hairs made of synthetic resin such as polypropylene, which are very thin and have a diameter of approximately 1.5 m in diameter, and are densely planted.

Incidentally, in the above embodiment, the present invention was applied to a magneto-optical disk device, but the present invention can be similarly applied to an optical disk device.

Furthermore, in the above-described embodiment, the moving optical system was provided on both sides of the magneto-optical disk, but the present invention can be similarly applied even when the moving optical system is provided on one side of the magneto-optical disk. Can be done.

Furthermore, in the above-described embodiment, the disk cartridge is loaded/ejected by horizontally reciprocating the disk cartridge. The present invention can be similarly applied to devices equipped with a loading mechanism that moves the disk cartridge in the vertical direction.

Further, in the above-described embodiment, the spring force of the spring stretched during loading is used as the power for ejecting the disk cartridge, but there is also a loading method in which a motor or the like is used to eject the disk cartridge. Regarding those equipped with a mechanism,
The invention can be applied in a similar manner.

[0053]

[Effects of the Invention] As explained above, according to the present invention,
Since it is possible to prevent dust from entering from around the disk cartridge, it is possible to improve the dustproof effect.

[Brief explanation of drawings]

FIG. 1 is a schematic partial cross-sectional view showing the configuration of an optical disc device according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view illustrating the configuration of a sealed chassis according to an embodiment of the present invention.

FIG. 3 is a schematic partial cross-sectional view illustrating a door member according to an embodiment of the present invention.

FIG. 4 is a schematic perspective view illustrating a disk cartridge according to an embodiment of the present invention.

FIG. 5 is a schematic partial sectional view showing a state in which the disk cartridge pushes open the door member.

FIG. 6 is a schematic partial cross-sectional view illustrating a state in which the disk cartridge is completely accommodated.

FIG. 7 is a schematic partial cross-sectional view illustrating a state in which the disk cartridge is completely accommodated.

FIG. 8 is a schematic partial cross-sectional view showing another example of a mechanism for sealing the gap between the sealed chassis member and the disk cartridge.

FIG. 9 is a schematic perspective view showing an example of a sealing member.

FIG. 10 is a schematic perspective view showing another example of a sealing member.

[Explanation of symbols]

1 Frame 4 Front panel 15 Lower chassis member 16 Upper chassis member 24 Opening 34 Door parts 36 Disc cartridge 51, 52 Seal member

Claims (5)

[Claims] Claim 1: In an optical disc device that positions a disc cartridge containing an optical disc at a predetermined position of a drive device using a loading mechanism, when the disc cartridge is completely housed in the predetermined position, the outer circumferential surface of the disc cartridge is An optical disc device characterized by comprising a blocking member that surrounds the cartridge at substantially the same cross-sectional position in the thickness direction and substantially blocks the inside of the drive device from the outside. 2. An optical disc device in which a disc cartridge containing an optical disc is positioned at a predetermined position in a drive device using a loading mechanism, comprising: a sealed chassis member that houses the drive device in a sealed state; and an inner side of the sealed chassis member. A blocking member is provided in the disk cartridge and surrounds the outer peripheral surface of the disk cartridge at substantially the same cross-sectional position in the thickness direction of the disk cartridge in a state where the disk cartridge is completely housed in a predetermined position, thereby substantially blocking the inside of the drive device from the outside. An optical disc device characterized by: 3. An optical disk device that positions a disk cartridge containing an optical disk at a predetermined position of a drive device using a loading mechanism, comprising: a sealed chassis member that houses the drive device in a sealed state; and a disk of the sealed chassis member. A door member provided inside the cartridge accommodating opening and a door member provided inside the hermetically sealed chassis member align the outer circumferential surface of the disk cartridge with approximately the same width in the thickness direction of the disk cartridge when the disk cartridge is fully accommodated in a predetermined position. An optical disk device characterized by comprising a blocking member that surrounds the drive device at a cross-sectional position and substantially blocks the inside of the drive device from the outside. 4. The optical disc device according to claim 1, wherein the blocking member is an elastic sealing member. 5. The optical disc device according to claim 4, wherein the elastic sealing member is formed by densely flocking a large number of extremely thin threads to a base cloth.