JP3029941B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for recording and reproducing a disk with a cartridge, such as a mini disk player, and more particularly to an optical pickup used for the device.

[0002]

2. Description of the Related Art An example of this type of disk drive will be described with reference to FIGS. 3 and 4. Reference numeral 1 denotes a disk with a cartridge comprising a disk 2 and a cartridge 3 for accommodating the disk 2 in a rotatable state. Has a chucking opening 4 and a pickup opening 5 at the center. Reference numeral 6 denotes a disk motor installed on the chassis 8, and 9 denotes a turntable which is mounted on the rotating shaft 7 of the disk motor 6, enters the cartridge 3 through the chucking opening 4, and mounts the disk 2. .

[0003] Reference numeral 10 denotes an optical pickup comprising an optical system block section 11 containing a light source and an optical system component for guiding a light beam emitted therefrom in a predetermined direction, and an objective lens drive block section 12 provided on the upper surface thereof. Are supported on a chassis 8 by guide means (not shown) so as to be movable in the radial direction along the surface of the disk 2.

The objective lens driving block 1
2 is an objective lens 13 and a lens holder 1 for supporting the objective lens 13
4 and a movable portion including a drive coil for focusing and tracking provided on the holder 14 and a magnetic circuit as a fixed portion including the magnet 15 and the magnetic yoke 16 and the like. The objective lens 13 of the optical pickup 10 is inserted into the cartridge 3 through the pickup opening 5 of the cartridge 3 and faces the disk 2 with a small gap.

[0005]

In the above-mentioned conventional disk drive, since only the objective lens 13 enters the cartridge 3 when the disk with the cartridge is mounted, the chassis provided with the optical pickup is provided.
The distance between the cartridge 8 and the cartridge 3 is wide, which has been a major obstacle to reducing the thickness of the product itself.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a disk apparatus according to claim 1 for recording or reproducing data on a disk with a cartridge using an optical pickup. In, the light source and the light beam emitted from the light source in a predetermined direction
An optical system block section having optical system components for guiding
When the disc with cartridge is mounted, the objective lens and lens
Part of the cartridge and magnetic circuit
Through the cartridge opening and the disk surface
Objective lens protruding so as to enter the gap of
Lens drive including a lens, lens holder and magnetic circuit
With a block, and the radius of the disk with the cartridge
Direction movably supported in a direction perpendicular to the moving direction
The optical system block section and the objective lens drive block
And an optical pickup in which the parts are arranged.
Disk device.

[0007]

[0008]

According to the first aspect of the present invention, there is provided a disk drive having
A light source and a light beam emitted from the light source in a predetermined direction.
Optical system block with optical system components
Objective lens and lens holder when loading a disc with
And part of the magnetic circuit is open for cartridge pickup.
The gap between the inner surface of the cartridge and the disk surface through the mouth
Objective lens and lens
Lens drive block equipped with a holder and a magnetic circuit.
And a radially moving disk with a cartridge.
Movably supported, and in a direction orthogonal to the moving direction.
The optical system block and the objective lens drive block
Equipped with an optical pickup arranged, complicating the structure
Without inviting, keep the thickness of the optical pickup small.
Can be. In addition, optical pickup when loading disc
Part of the objective lens, lens holder, and magnetic circuit
Cartridge through the cartridge pickup opening
Optical pickup.
For example, reduce the distance between the chassis and the cartridge.
And thus the product itself can be made thinner.
Can be. Furthermore, the optical system block and the objective lens drive
The moving block and the optical pickup are orthogonal to the moving direction of the optical pickup.
The optical pickup thickness
Can be on the width of the moving direction of the optical pickup
Optical pickup during recording and playback.
The effect that the degree of freedom of the top movement can be increased
To play.

[0009]

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIGS. 1 and 2 will be described below in detail. FIG. 1 is a sectional view showing a main part of a disk drive according to an embodiment of the present invention, and FIG. 2 is a plan view showing the main part. In FIGS. 1 and 2, FIGS.
Common parts are denoted by common reference numerals.

The optical pickup 17 in the present embodiment is
An optical system block 18 incorporating a light source such as a semiconductor laser and an optical system component for guiding a light beam emitted from the light source in a predetermined direction, and an objective lens drive block 19 are arranged side by side along the surface of the disk 2 so as to be conventionally known. Is supported movably in the radial direction of the disk with guide means on the chassis.

The objective lens drive block section 19 includes an objective lens 20, a lens holder 21 for holding the objective lens 20, and mounting focusing and tracking drive coils 22, 23, and an elasticity based on the lens holder 21. Objective lens 20 and lens holder 21
Part of the magnetic circuit together with part of the optical pickup 17
For example, a cover 24 which forms a part of its outer shell
And the remaining part is accommodated in the cover 24.

The magnetic circuit comprises a U-shaped magnetic yoke 25 fixed on a base, and magnets 26 mounted on both side walls of the yoke 25 facing each other. 22,
23 are arranged. The magnetic circuit having the above configuration covers both side walls of the magnetic yoke 25 and each upper end of the magnet 26 with the cover 24.
Projecting above the upper surface.

In the optical pickup 17, when the disc 1 with the cartridge is mounted, the objective lens 20, a part of the lens holder 21, and each part of the magnetic circuit (the magnetic yoke 25 and the magnet 26) are mounted in the cartridge. The cartridge 3 is configured to enter the cartridge 3 through the pickup opening 5.

Accordingly, the optical pickup 17 has a part of the lens holder 21 and a part of the magnetic circuit protruding outward from the cover 24, thereby reducing the thickness of the optical pickup 17 by at least the size of the protrusion. Since the protrusions of the lens holder 21 and the magnetic circuit can enter the cartridge 3 through the pickup opening 5, the distance between the cartridge 3 and the upper surface of the optical pickup 17 can be increased by the protrusions. It is not necessary, and the distance between the cartridge 3 supporting the optical pickup 17 and the cartridge 3 can be reduced, and the product itself can be made thinner.

Furthermore, in the above embodiment, the optical system block 18 and the objective lens drive block 19 are arranged side by side along the surface of the disk 2, so that both the blocks 1
The thickness of the optical pickup 17 itself can be further reduced as compared with the conventional one in which the optical pickups 8 and 19 are arranged in a direction perpendicular to the surface of the disk 2, and the product itself can be more effectively made thinner.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the present invention may be applied to the arrangement direction of the optical system block section and the objective lens drive block section without departing from the scope of the invention. Needless to say, the present invention may be appropriately modified and implemented.

[0018]

As described above , according to the structure of the present invention,
The thickness of the optical pickup can be reduced without complicating the structure.
It can be kept small. Also, when loading a disc
Optical pickup objective lens, lens holder, magnetic
Part of the path through the cartridge pick-up opening
Optical cartridge.
Backup, eg chassis and cartridge
And the distance between the
The thickness can be reduced. In addition, the optical system block
Of the optical pickup between the optical pickup and the objective lens drive block
Since it is arranged in the direction perpendicular to the direction,
In addition to being able to further reduce the thickness, an optical pickup
The width in the moving direction of the
The freedom of movement of the optical pickup when
This has the effect of providing

[0019]

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a disk device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the essential parts.

FIG. 3 is a sectional view showing a portion of a conventional disk device corresponding to a main part of the present invention.

FIG. 4 is a plan view showing a portion corresponding to the main part of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc with cartridge 2 Disc 3 Cartridge 4 Chucking opening 5 Pickup opening 6 Disk motor 8 Turntable 17 Optical pickup 18 Optical system block 19 Objective lens drive block 20 Objective lens 21 Lens holder 25 Magnetic yoke 26 Magnet

Claims (1)

(57) [Claims] 1. A disk device for recording or reproducing the disc with cartridge using an optical pickup, guide the light flux emitted from the light source and the light source in a predetermined direction
Block with optical system components , objective lens and lens when mounting disc with cartridge
Pickups part of the holder and the magnetic circuits of the cartridge
Cartridge plane through-up opening and the disk surface
Objective lens protruding into the gap between
Driving an objective lens and a's and the lens holder and the magnetic circuit
And a movable block portion, which is supported movably in the radial direction of the disk with the cartridge.
The optical system block in a direction orthogonal to the moving direction.
Optical pickup in which the unit and the objective lens drive block unit are arranged.
A disk device comprising a backup .