JPH0793949A - Apparatus for driving recording disc - Google Patents

Abstract

PURPOSE:To make an apparatus thin and control a projecting beam from a carriage not to incline. CONSTITUTION:A carriage 9 provided with an optical system comprising an objective lens 8 for projecting condensed light beams to an optical disc 2, etc., is supported by a rail 10 to be movable in a diametrical direction of the optical disc 2. A rail seat 14 for receiving the rail 10 and a spindle motor 3 for rotating the optical disc 2 are set at a movable plate 12 one end of which is rotatably supported by a shaft 13. The disc cartridge 1 is made detachable while the spindle motor 3 is retreated without breaking a positional relation between the spindle motor 3 and rail seat 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording disk drive device for rotating a recording disk such as an optical disk and a magneto-optical disk for recording and reproducing information.

[0002]

2. Description of the Related Art Conventionally, in an optical disk drive, as shown in Japanese Patent Laid-Open No. 4-92252, an optical disk and a disk drive are moved by moving a disk drive means such as a motor in order to make the apparatus thinner. Method to engage with means (hereinafter referred to as spindle load method)
It has been known. This spindle loading method is a device that does not have a movement stroke of the cartridge as compared with a method of moving the cartridge containing the optical disk and engaging the optical disk with the disk drive means (hereinafter, cartridge loading method). Can be made thinner.

A conventional spindle loading method will be described with reference to a partial sectional view of FIG. In the figure, 1 is a disk cartridge containing an optical disk 2 therein, 3 is a spindle motor having a rotating pin 5 that fits with a hub 4 of the optical disk 2, 6 is a movable plate on which the spindle motor 3 is fixed, and 7 is movable. It is a chassis that is in contact with the plate 6 at one end and extends laterally of the spindle motor 3.

The chassis 7 has means such as an optical system including an objective lens 8 for emitting a light beam to the optical disk 2 to record and reproduce information as is well known. A carriage 9 that moves in the radial direction of the optical disk 2 and a rail 10 that movably supports the carriage 9 are provided.

In FIG. 5, when the disc cartridge 1 is loaded, the movable plate 6 is moved away from the chassis 7 to form an insertion space for the disc cartridge 1, and after the disc cartridge 1 is inserted, the movable plate 6 is placed on the disc cartridge 1. Move it in a direction closer to 1. By this movement, the rotary pin 5 of the spindle motor 3 and the hub 4 of the optical disc 2 are fitted to each other, and the recording / reproducing state becomes possible.

When the disc cartridge 1 is ejected,
The movable plate 6 is moved in a direction away from the chassis 7 to separate the spindle motor 3 and the optical disc 2 from each other, thereby forming a discharge space for the disc cartridge 1.

As described above, in the spindle loading method, since the disk cartridge 1 does not move in the direction in which the disk cartridge 1 comes into contact with or separates from the spindle motor 3, accordingly,
The device can be made thinner.

[0008]

In the recording disk drive device, when recording and reproducing information on the optical disk 2,
The optical means of the carriage 9 emits a light beam to form a light spot on the optical disc 2. At this time, the optical axis of the light beam emitted from the carriage 9 needs to be perpendicular to the optical disc 2. If the optical axis is tilted, coma will occur in the light spot and the SN ratio of the signal will be reduced.

The factors causing the optical axis to tilt in the spindle loading method are the warp of the optical disk 2, the tilt that occurs when the optical disk 2 is mounted on the spindle motor 3, the tilt of the spindle motor 3 with respect to the movable plate 6, and the movable plate 6. The tilt that occurs when the carriage 7 contacts the chassis 7, the tilt of the rail 10 with respect to the chassis 7, the tilt of the carriage 9 with respect to the rail 10, and the tilt of the optical axis of the emitted light beam with respect to the carriage 9 are considered.

On the other hand, in the cartridge loading method, the spindle motor does not move and is fixed directly to the chassis. Therefore, the tilt that occurs when the movable plate described in the above item comes into contact with the chassis does not occur.

As described above, in the spindle load method, the inclination of the optical axis is relatively likely to occur, and it can be said that there is a problem in reliability of recording and reproducing information.

An object of the present invention is to provide a recording disk drive device which can be made thin and which can suppress the occurrence of inclination of the light beam emitted from the carriage.

[0013]

In order to achieve the above object, the present invention provides a motor for rotating a recording disk housed in a disk cartridge detachably set at a predetermined position, and an optical disk for the recording disk. In a recording disk drive device comprising a carriage having means for emitting a beam to record and reproduce information, a rail for movably supporting the carriage in the radial direction of the recording disk and a rail for receiving the rail. The receiving plate and the motor are provided on a movable plate, and the movable plate is provided with a moving means for moving the movable plate in a direction away from the disk cartridge when the disk cartridge is attached and detached.

Further, when the movable plate moves to a predetermined position close to the disk cartridge, the rail is held between the movable plate and a frame body installed on the disk cartridge side facing the movable plate. It is characterized by having done.

Further, the present invention is characterized by further comprising holding means for holding the frame when the movable plate moves in a direction away from the frame body.

Further, the holding means is formed of a buffer member, and is configured to abut the carriage when the carriage moves excessively.

[0017]

In the recording disk drive apparatus having the above structure, the motor for rotating the recording disk is fixed to the movable plate provided with the rail seat for receiving the rail for movably supporting the carriage in the radial direction of the recording disk. Since the movable plate moves in the direction away from the recording disc when the disc cartridge is attached or detached, the motor can be retracted when the disc cartridge is attached or detached without damaging the positional relationship between the motor and the rail seat. Therefore, a stable light beam with a small optical axis inclination can be emitted, and it is not necessary to move the disk cartridge away from the motor when the cartridge is attached or detached, so that the device can be made thin.

Further, when the movable plate moves to a position approaching the frame body, the rail is held between the frame body and the movable plate, so that an intermediate intervening member for determining the positional relationship between the motor and the rail is not necessary. Therefore, the positional accuracy of the motor and the rail can be easily obtained. If you make the rail a round bar,
The machining accuracy of the diameter dimension can be easily made high, and the positional relationship between the frame body and the movable plate is determined by the diameter dimension processing accuracy of the rail, resulting in high accuracy.

Further, since the holding means for holding the rail when the movable plate is moved in the direction away from the frame body is provided, the rail can be moved with the movable plate without coming off.

Further, since the holding means also serves as a buffer means for stopping the carriage runaway movement, the number of parts can be reduced.

[0021]

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

FIG. 1 is a partial front sectional view showing an essential part of an embodiment of the present invention. Members corresponding to those described with reference to FIG. 5 are designated by the same reference numerals and detailed description thereof will be omitted. .

Reference numeral 11 denotes a frame body for receiving the disk cartridge 1 on the upper side, and 12 denotes a movable plate which extends below the frame body 11 and whose right end is rotatably supported by a shaft 13. A rail seat 14 is fixedly provided on the spindle motor 3. The rail seat 14 receives both ends of a rail 10 that movably supports the carriage 9, and a gear portion 17 that meshes with a drive gear 16 of a drive motor 15 at the right end. Is provided.

Further, the frame body 11 is provided with a rail seat 18 opposed to the rail seat 14 of the movable plate 12 with the rail 10 interposed therebetween, as will be described later, and this rail seat 18.
It has a holding member 20 provided so as to hang near 18 and formed of a cushioning member such as rubber and having a receiving hole 19 into which the rail 10 is inserted.

FIG. 1 shows a set state (loading state) of the disc cartridge 1 at a predetermined position, in which the movable plate 12 is held in the horizontal position by the meshing of the gear portion 17 and the drive gear 16, and the spindle motor 3 The rotation pin 5 of the optical disc 2 and the hub 4 of the optical disc 2 are fitted to determine the center of rotation of the optical disc 2, and the carriage 9 enters the access window 1a of the disc cartridge 1 and is movable in the disc radial direction. / It is ready for playback.

FIG. 3 is a side sectional view of the rail seats 14 and 18 of FIG. 1, in which the pair of rails 10 are formed by cutting out the movable plate 12 at a right angle in the loading state. It is held by a rail seat 14 made up of and a rail seat 18 made up of an inclined surface 18a that presses the rail 10 by contacting the rail 10 in the direction of the rail seat 14 of the movable plate 12 on the frame body 11. .

FIG. 2 shows the ejected state of the disc cartridge 1.
(Unloaded state), the movable plate 12
Receives the rotational driving force of the drive gear 16 of the drive motor 15 and rotates the gear portion 17 to rotate counterclockwise about the shaft 13 and move away from the frame body 11. Therefore, from the rotation pin 5 of the spindle motor 3 to the optical disk 2
Hub 4 separates and the disc cartridge 1 is ejected
Allows movement (in the direction of arrow A).

In the state of FIG. 2, the rail seat 14 of the movable plate 12 separates from the rail 10 as shown in FIG. 4, but the rail 10 engages with the lower wall of the receiving hole 19 of the holding member 20 of the frame body 11. Hold together.

Since the holding member 20 is formed of a cushioning member, it restricts the moving range of the carriage 9 and when the carriage 9 collides with the holding member 20 due to excessive movement or runaway,
The collision will be buffered.

[0030]

As described above, according to the structure of the first aspect of the present invention, the recording disk drive device includes the movable plate, the motor for rotating the recording disk, and the carriage for emitting the light beam. Since a rail seat for guiding the movement of the recording disk in the radial direction is provided, the motor can be retracted when the disk cartridge is attached or detached without damaging the positional relationship between the motor and the rail seat, and the tilt of the optical axis can be prevented. Since the small and stable emission of the light beam is possible, the accuracy of recording and reproducing of information is improved, and the disc cartridge need not be retracted from the motor when the disc cartridge is attached or detached. Can be achieved.

According to the second aspect of the present invention, since the rail is held between the frame body and the movable plate in a state where the movable plate is close to the disk cartridge,
Accurate and reliable rail holding and positioning.

According to the third aspect of the invention, even if the movable plate is separated from the frame body, the rail can be held by the holding means, so that the rail can be prevented from slipping off and displaced, and the movable plate can be stably moved. become.

According to the structure of claim 4, since the holding means also serves as the buffer means for restricting the movement of the carriage, the number of parts can be reduced and the structure can be simplified.

[Brief description of drawings]

FIG. 1 is a partial front sectional view showing a main part of an embodiment of a recording disk drive device of the present invention.

FIG. 2 is a front partial cross-sectional view showing the ejected state of the disc cartridge of the present embodiment.

FIG. 3 is a side sectional view of a rail seat portion of FIG.

FIG. 4 is a side sectional view of the rail seat portion of FIG. 3 in a loading state.

FIG. 5 is a partial cross-sectional view of a conventional optical disk drive device.

[Explanation of symbols]

1 ... Disc cartridge, 2 ... Optical disc, 3 ...
Spindle motor, 4 ... Hub, 5 ... Rotating pin, 8
… Objective lens, 9… Carriage, 10… Rail, 11
… Frame body, 12… Movable plate, 13… Shaft, 14,
18 ... Rail seat, 15 ... Drive motor, 16 ... Drive gear,
17 ... Movable plate gear, 19 ... Receiving hole, 20 ... Holding member.

Claims (4)

[Claims] 1. A motor for rotationally driving a recording disk housed in a disk cartridge detachably set at a predetermined position, and means for emitting a light beam to the recording disk to record and reproduce information. In a recording disk drive device including a carriage having a carriage, a rail for movably supporting the carriage in a radial direction of the recording disk, a rail seat for receiving the rail, and the motor are provided on a movable plate, and the movable plate is provided. A recording disk drive device, wherein the movable plate is provided with a moving means for moving the plate away from the disk cartridge when the disk cartridge is attached or detached. 2. When the movable plate moves to a predetermined position close to the disc cartridge, the rail is held between a frame body and a movable plate which are installed on the disc cartridge side so as to face the movable plate. The recording disk drive device according to claim 1, wherein the recording disk drive device is configured. 3. The recording disk drive device according to claim 2, further comprising holding means for holding the frame when the movable plate moves in a direction away from the frame body. 4. The recording disk drive device according to claim 3, wherein the holding means is formed of a cushioning member, and is configured to come into contact with the carriage when the carriage moves excessively.