JP2514009Y2 - Optical disk drive device having a dustproof mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to an optical disc drive device provided with means for preventing dust from entering a disc cartridge inserted into the device.

[Prior Art] In recent years, the industry of information such as computers has been remarkably expanded, and the amount of information to be handled tends to increase dramatically.

Therefore, instead of the conventional magnetic head, it is possible to optically record information at high density on a disk-shaped recording medium (hereinafter referred to as a disk) by using a laser beam or to reproduce the information at a high speed. The information recording / reproducing apparatus is in the spotlight.

With such a disc, if dust is present on the surface,
The above-mentioned disc is housed in a cartridge because there is a possibility that recording may fail or erroneous recording or reproduction may fail due to insufficient amount of light applied to the recording surface.

The cartridge is loaded and mounted at a predetermined position set on the base of the recording / reproducing apparatus while being held by the cartridge holder, and the clamp portion of the disc is rotated by being clamped by the clamp means. . Further, the optical pickup can access an arbitrary spiral or concentric circular track provided on the disk to write and read information.

In addition, there is an insertion port on the entire surface of the device for inserting / removing the cartridge containing the disc, and the opening / closing lid that normally closes this insertion port is pushed to push the tip of the cartridge. The mouth is open and the cartridge can be inserted. The inserted cartridge is transported by the loading mechanism, and the disc is mounted on the turntable.

During the course of this transportation, the shutter opening / closing lid of the cartridge is moved to expose a part of the disc, and when mounted on the turntable, the optical pickup facing this exposed portion enables recording / reproduction. Become.

Further, in the magneto-optical device, the bias magnetic field applying means closely faces the disk surface opened on the side opposite to the disk surface facing the optical pickup.

Further, in order to prevent recording, reproduction, and error from being caused by dust that has entered from the outside of the device when the cartridge is inserted or ejected, the gap between the base and the cartridge and the gap between the holder and the cartridge are reduced. A dustproof means such as a sheet and a dustproof cover for preventing the entry of dust from the opening of the bias magnetic field applying means mounting portion are provided.

On the other hand, when recording / reproducing is completed and the eject button or the like is operated, the mounting is released, the cartridge is conveyed in the direction opposite to that at the time of loading, the opening / closing lid is opened, and the cartridge is ejected from the insertion port.

[Problems to be Solved by the Invention] However, in the above-described recording / reproducing apparatus, in order to prevent dust from adhering to the disc, ventilation in the vicinity of the disc was blocked, so that bias magnetic field applying means and Since the heat generated by the optical pickup moving means cannot be dissipated, there are drawbacks such that the temperature easily rises in the device, the temperature of the medium becomes high, the life of the medium is shortened, the disk is deformed, or the mechanism accuracy is degraded. Came to do.

Therefore, the present invention was developed in view of the above-mentioned drawbacks of the conventional device, and prevents the temperature rise of the magneto-optical recording medium while preventing or reducing the adhesion of dust to the magneto-optical recording medium. It is an object of the present invention to provide an optical disk drive device having a dustproof mechanism capable of performing the above.

[Means and Actions for Solving the Problem] The present invention has an opening for accommodating a magneto-optical recording medium and exposing a part of the magneto-optical recording medium, and a shutter for opening and closing the opening. A cartridge holder that holds a cartridge, a loading mechanism that loads the magneto-optical recording medium to a predetermined mounting position via the cartridge holder, and a part of the magneto-optical recording medium that is exposed at the predetermined mounting position. In order to achieve the above, in an optical disk drive device provided with a dust-proof mechanism having a shutter moving mechanism for opening the shutter of the cartridge, and a bias magnetic field applying means for applying a bias magnetic field to the magneto-optical head medium exposed at the mounting position, The cartridge holder is formed with an opening at a portion facing the opening of the cartridge, An optical disk live device having a dustproof mechanism, characterized in that an opening of a cartridge holder is closed by a filter, and the filter is arranged so that an air flow generated by rotation of the optical magnetic field recording medium passes through the filter. .

That is, the present invention removes dust by closing the opening facing the bias magnetic field applying means provided in the cartridge holder with a filter and arranging the filter so that the airflow generated by the rotation of the magneto-optical recording medium passes through the filter. It becomes possible to supply the clean cooling air to the bias magnetic field applying means, etc., and even if the cartridge is in the opened state, it prevents or reduces the intrusion of dust into the opening while suppressing the temperature rise of the magneto-optical recording medium. Exert.

Embodiments Embodiments of the present invention will be specifically described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a side sectional view of the periphery of a turntable, FIG. 2 is an external view of an optical disk drive device, and FIG. 3A is a perspective view showing the base and the cartridge holder with the dust member removed, and FIG. 3B is a perspective view showing the base and the cartridge holder upper plate with the dustproof member attached. FIG. 4C is a cross-sectional view showing the mounting state of the filter, and FIG. 4 is a perspective view showing the back surface side of the cartridge holder upper plate.

As shown in FIG. 2, the optical disk drive device is provided with an insertion port 4 for inserting / ejecting the cartridge 3 on the panel plate on the entire surface of the frame 2, and a ventilation port is provided below the insertion port 4 on this entire surface. 5 is provided. This vent 5
Is for allowing ventilation inside the device 1, and is constituted by a large number of lattice-shaped through holes, and a dustproof filter (not shown) is provided inside thereof.

The insertion opening 4 is normally closed by an insertion opening opening / closing lid 6, and by pushing the tip of the cartridge 3, the opening / closing lid 6 is opened to insert the cartridge 3 into the insertion opening 4.
Can be inserted.

The upper surface of the device 1 is covered with a substrate 7, and the bottom surface is closed with a sheet plate 8 made of a thin metal plate to prevent dust from entering from the lower side and to serve as a shield material for a drive substrate housed in the device 1. Has become.

In the cartridge 3, a disk 9 having an open center is housed.

The apparatus 1 excluding the frame 2 and the substrate 7 has a loading mechanism (for example, Japanese Patent Laid-Open No. 2-56764) including a moving means and a driving means for moving the cartridge 3 on both sides of the base 11 shown in FIG. 3 (a). Omitted because they are the same)
Is attached. By this loading mechanism, the cartridge 3 inserted from the insertion port 4 is conveyed, and the disk 9 in the cartridge 3 is mounted on the turntable 12 so that recording or reproduction is possible. The state of this apparatus is as shown in FIG.

When the eject button or the like is operated in this mounted state, the eject button or the like is conveyed in the direction opposite to the loading direction, and the insertion port 4
The cartridge 3 is discharged from.

As shown in FIG. 3 (a), an opening 11a is provided in the vicinity of the center of the base 11, and a turntable 12 is provided at a portion of the opening 11a near the insertion port 4 so as to project upward. The base end side of is attached to a spindle motor (not shown) and is rotationally driven. The actuator portion of the optical pickup 13 is adjacent to the turntable 12 and faces the opening 11a. As shown in FIG. 1, recording of information on the disc 9 mounted on the turntable 12 or reproduction of the recorded information is performed. You can do it.

A cartridge holder 14 for holding and carrying the cartridge 3 is attached to the upper part of the base 11 via the side plates 10 and 10 so as to be movable in the carrying direction.

Since the device 1 of the first embodiment is a magneto-optical device, a rectangular opening 16 (see FIG. 1) is provided near the center of the upper plate 15 of the cartridge holder 14 to apply a bias magnetic field. Means 17 are attached.

The bias magnetic field applying means 17 is normally retracted above the opening 16, but when the disk 9 is mounted on the turntable 12 as shown in FIG. A magnetic field can be applied close to the surface.

The bias magnetic field applying means 17 is a cartridge holder.
It is attached to the upper plate 15 of 14 through a mounting plate 21, and the mounting plate 21
Is separated from the upper plate 15 by the urging force of a coil spring (not shown), and comes into contact with the stop member 22 to regulate the position.

A coil is wound around an iron core (not shown) on the lower surface of the mounting plate 21, and a current is supplied to the coil so that a bias magnetic field can be applied to the disk 9 facing the coil.

On both sides of the mounting plate 21, a pin 23 is projected outward, and the pin 23 is an elongated hole formed in a lever member 24 on the rear end side.
24a (see FIG. 1). A coil spring (not shown) is interposed between the lever member and the mounting plate 21, and the base end side of the mounting plate 21 is rotationally biased in the direction of the upper plate 15 by the coil spring. The lever member 24 is rotatably pivoted on the upper plate 15 via a pin 24b, and a pin 23 is formed by a coil spring (the above-mentioned other) between the rear end portion 24c of the lever member 24 and the upper plate 15. When is the center of rotation, the force is set to generate a moment acting in the opposite direction, which is larger than the moment generated by the weight of the coil mounted on the mounting plate 21, and the rear end 24c of the lever member 24 is It is urged to rotate in the direction of the base 11 by a spring.

The rear end portion 24c of the lever member 24 is inserted into the groove 15a formed in the upper plate 15.

The rear end portion 24c is the stopper 2 provided on the base 11.
When the lever member 24 comes into contact with the upper plate 1,
The coil (not shown) is driven in the direction close to 5, and the coil (not shown) is set close to the disk 9.

When the cartridge 3 is inserted into the cartridge holder 14 in such a state while being slidably contacted with the bent portion provided on the lower surface of the cartridge body 3a, the opening / closing lever 26 (in the recess 3c provided in the shutter 3b of the cartridge 3 (See FIG. 4) The engaging pin 26a attached to the pivoting tip of the pivoting lever 26 engages, and the opening / closing lever 26 is pivoted against the biasing force of the coil spring as the cartridge 3 is inserted. Shutter
3b sliding starts. The open / close lever 26 has a long hole 2 in which the stop pin 26b provided on the open / close lever is provided on the upper plate 15.
The rotation is stopped by contacting the hole wall on the tip side of 7.

At the same time, the insertion of the cartridge 3 is stopped, and in this state, the sliding of the shutter 3b is finished, the rectangular opening 3b (see FIG. 1) of the cartridge body 3a is completely opened, and the disc 9 stored in the cartridge 3 is removed. Expose.

As described above, the cartridge 3 is conveyed from the insertion opening 4, and the dust-containing air also passes from the insertion opening 4 through the upper plate 15 of the cartridge holder 14, and a part of the air is included in the opening 1 of the upper plate 15.
6, the long holes 27, 27 provided in the upper body 15 and the groove 15a provided in the upper plate 15 of the rear end portion of the cartridge holder 14 enter.

Therefore, in this device 1, while preventing dust from adhering to the disk 9, the cooling air for the bias magnetic field applying means 17 is secured,
In order to prevent the temperature rise of the medium, a dustproof means as described below is provided.

As shown in FIGS. 3B and 3C, the upper surface of the cartridge holder 14 (upper plate 15) of FIG.
Is affixed. An electret filter having a low pressure loss and a good dust collection efficiency is suitable for the filter 54, but the filter material is not limited to this. The upper surface cover 41 also surrounds the long hole 27 provided in the upper plate 15 to prevent dust from entering from this portion.

The space between the cartridge 3 and the base 11 and the upper plate 15 is made sufficiently narrow to increase the resistance to the air flow and prevent the inflow of air containing dust. Specifically, if the distance between the cartridge 3, the base 11 and the upper plate 15 is about 2% or less with respect to the flow path length D of the air, a sufficient dustproof effect can be expected.

Besides this, as shown in FIG. 4, the lever sponge seals 44, 44 are also attached to the cartridge shutter opening / closing levers 26, 26, and when the insertion of the cartridge is completed, the sponge seal 44 is attached so that the position of the rear portion of the upper surface of the holder is overlapped. Since the opening / closing levers 26, 26 are located on the rear side, the two sponge seals 44, 44 close the rear portion of the cartridge holder, and the opening 3b of the cartridge 3 is passed through the opening on the rear side of the holder.
Dust is prevented as much as possible from entering. In the figure, 42,43
Is a holder circle top sheet, and 45 is a rear seal.

Thus, in one embodiment, when the cartridge 3 is inserted into the device 1 and the disc 9 is in the rotating state 9,
The air cleaned by the filter 54 using the air flow generated in the tangential direction of the disk 9 is bias magnetic field applying means.
Since 17 cools, it is possible to prevent dust from adhering as much as possible while preventing the temperature of the medium from rising. Therefore, at the time of writing or reading information, it is possible to prevent a writing error or a reading error from occurring due to a decrease in the amount of light due to dust adhering to the disk 9 or the like. It is possible to prevent deterioration of the mechanical system.

(Second Embodiment) FIG. 5 is a sectional view of an essential part showing a second embodiment of the present invention.

In this embodiment, the bias applying means 17 is provided with a vent hole 53,
The filter 54 is attached thereto, and the packing 55 is refurbished so that dust is not sucked in between the upper plate 15 and the bias magnetic field applying means 17, but the other configurations are the same as those of the first embodiment. The description is omitted because it is the same as the example.

The second embodiment is different from the first embodiment in that air is not circulated inside the cover 41, so that the temperature rise of the medium can be prevented more effectively.

[Advantages of the Invention] As described above, according to the present invention, the opening facing the bias magnetic field applying device provided in the cartridge holder is closed by the filter, and the air flow generated by the rotation of the magneto-optical recording medium passes through the filter. By arranging the filter in this way, it is possible to supply clean cooling air from which dust has been removed to the bias magnetic field application means, etc., and even if the cartridge is in the open state, it is possible to prevent or reduce the ingress of dust into the opening. At the same time, the temperature rise of the magneto-optical recording medium can be suppressed. Therefore, it is possible to reduce or prevent the occurrence of a writing error, a reading error, or the like due to the insufficient light amount during recording or reproduction, and it is also possible to prevent the deterioration of the writing data and the deterioration of the mechanism accuracy of the disk.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a side sectional view of the periphery of a turntable, FIG. 2 is an external view of an optical disk drive device, and FIG. FIG. 3B is a perspective view showing the base and the cartridge holder with the members removed, FIG. 3B is a perspective view showing the base and the cartridge holder upper plate with the dustproof member attached, and FIG. And FIG. 4 is a perspective view showing the back side of the cartridge holder upper plate, and FIG.
The drawing is a cross-sectional view of an essential part showing a second embodiment of the present invention. 1 …… Optical disk drive device 3 …… Cartridge 4 …… Insertion port 9 …… Disk 14 …… Cartridge holder 17 …… Bias magnetic field applying means 41 …… Holder top cover 53 …… Ventilation port 54 …… Filter 55 …… Packing

Claims (1)

(57) [Scope of utility model registration request] 1. A cartridge holder that holds a cartridge that houses a magneto-optical recording medium and allows a part of the magneto-optical recording medium to be exposed and a shutter that can open and close the opening, and the cartridge. A loading mechanism that loads the magneto-optical recording medium to a predetermined mounting position via a holder, and a shutter of the cartridge is opened so that a part of the magneto-optical recording medium is completely exposed at the predetermined mounting position. An optical disk drive device comprising a dust-proof mechanism having a shutter moving mechanism for causing a bias magnetic field applying means for applying a bias magnetic field to the magneto-optical recording medium exposed at the mounting position, wherein the cartridge holder has an opening portion of the cartridge. An opening is formed in a portion facing the cartridge holder, and the opening of the cartridge holder is filled. In closing, the filter is an optical disc drive device provided with a dustproof mechanism, wherein an air flow generated by rotation of the magneto-optical recording medium is arranged to pass through the filter.