JPH07169166A - Information processor - Google Patents

Abstract

PURPOSE:To obtain a reliable information processor by which an optical information recording medium is surely prevented from colliding with an objective lens while a cartridge is horizontally moved. CONSTITUTION:This processor is provided with a fixed guide 52 constituted of projected line parts 51A and 51A for guiding an optical disk 6 by possessing a guide part near a position where the objective lens 24 can exist and distant from the surface of the lens 24. Even when the optical disk 6 is moved in a cavity in the cartridge 2, it is allowed to abut on the fixed guide 52, so that it is surely prevented from colliding with the lens 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention receives a cartridge containing an optical information recording medium, irradiates a light beam to the information recording medium through an objective lens, and based on the reflected light from the information recording medium. The present invention relates to an information processing device that reproduces and processes at least information stored in an information storage medium.

[0002]

2. Description of the Related Art Conventionally, in this type of information processing apparatus, that is, an optical disk apparatus, a cartridge inserted horizontally from an insertion / removal opening is held by a cartridge holder. At this time, the shutter for opening and closing the opening of the cartridge is opened to expose a part of the optical disk which is the information storage medium housed inside by the shutter opening and closing mechanism mounted on the cartridge holder.

Then, by lowering the cartridge holder, the optical disk housed in the cartridge is mounted on the spindle motor as the medium driving means, and the information recording surface of the optical disk is brought close to the optical head. It had been.

However, the loading method in which the cartridge is moved up and down has a problem that the movement space of the cartridge in the apparatus is large and it hinders the reduction in the thickness of the apparatus.

In view of this, in recent years, as the demand for thinner devices has increased, a loading method has been started in which the spindle motor is moved up and down without moving the cartridge up and down. Moving the spindle motor up and down requires a smaller volume than moving the cartridge up and down, and is advantageous in reducing the thickness.

However, in the loading method in which the spindle motor is moved up and down, the actuator portion including the objective lens of the optical head has a positional relationship that is considerably close to the horizontally inserted cartridge in terms of height. Including the play of the optical disc in the above, there is a possibility that the optical disc may collide with the objective lens during the horizontal movement of the cartridge and damage the objective lens. In addition, the possibility of damaging the optical disc was matched.

[0007]

In the conventional apparatus, the means for preventing the optical information recording medium from colliding with the objective lens during the horizontal movement of the cartridge is not provided, and when the cartridge is horizontally inserted or At the time of horizontal ejection, when the information recording medium moves in the space inside the cartridge due to vibration or the like, it may collide with the objective lens, possibly damaging the objective lens. In addition, the possibility of damaging the optical disc was matched.

The present invention has been made based on the above circumstances, and provides a highly reliable information processing apparatus capable of reliably avoiding collision of an optical information recording medium with an objective lens during horizontal movement of a cartridge. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, the present invention receives a cartridge containing an optical information recording medium and irradiates the information storage medium with a light beam through an objective lens. In an information processing device that reproduces and processes at least the information stored in the information storage medium based on the reflected light from the information storage medium, a guide unit is provided near the position where the objective lens can exist and at a position distant from the surface of the objective lens. And a fixed guide for guiding the information storage medium.

[0010]

In the apparatus of the present invention, the fixed guide for guiding the information storage medium is provided in the vicinity of the position where the objective lens can exist and at the position distant from the surface of the objective lens. Even if the storage medium moves in the space in the cartridge, it can be reliably prevented from colliding with the guide portion of the fixed guide and colliding with the objective lens. As a result, it is possible to provide a highly reliable information processing apparatus capable of preventing scratches on the objective lens and scratches on the optical disc.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. 1 and 2 show a schematic configuration of an optical disc device 1 which is an information processing device. Also, FIG.
Shows a cartridge 2 used in the optical disk device 1, and FIG. 4 shows a state in which the shutter 3 of the cartridge 2 is opened.

First, the structure of the cartridge 2 will be described with reference to FIGS. In the figure, 4 is a cartridge body in the shape of a thin rectangular box.
Access windows 5A and 5B for recording, reproducing, and erasing are formed on both sides of the optical disk, and the optical information storage medium housed inside through these windows 5A and 5B is used. A part of both surfaces of a certain optical disk 6 is exposed.

A shutter 3 integrally formed on both sides is slidably provided in the cartridge body 4, and the window portion 5 is provided.
A and 5B are opened and closed. Further, the shutter 3 is always biased by a spring member (not shown) in the direction of closing the windows 5A and 5B. Further, the shutter 3 is connected to the shutter opening / closing claw portion 7, and the shutter opening / closing mechanism (not shown) pushes the shutter 3 in the direction of arrow A so that the shutter 3 can be opened against the biasing force of the spring member. It has become.

An arrow B shown in the drawing indicates a direction in which the cartridge 2 is inserted into the optical disk device 1. Next, an optical disc device 1 using the cartridge 2 will be described with reference to FIGS. 1 and 2.

In the figure, reference numeral 10 denotes a main body of the apparatus, and a front cover portion 10a of the main body 10 of the apparatus has an insertion / removal opening 11 for inserting / removing the cartridge 2, and the front cover portion 10a has a control panel. It also serves as a dual purpose, and is in a state in which the operation / display means 12 is provided.

A cartridge holder 15 on which the shutter opening / closing mechanism is mounted is provided in the apparatus main body 10 so as to receive and hold the horizontally inserted cartridge 2 from the insertion / removal opening 11.

Further, a spindle motor 16 is provided as a medium driving means for rotationally driving the optical disk 6 in the cartridge 2 held by the cartridge holder 15. The spindle motor 16 is moved up and down by a loading mechanism 17 (see FIGS. 5 to 7), which will be described later, so that the optical disk 6 in the cartridge 2 is mounted on or separated from the spindle motor 16.

Further, inside the apparatus main body 10, there is provided an information processing means 20 for reproducing and recording information on the optical disk 6 which is mounted on the spindle motor 16 and is rotationally driven.

The information processing means 20 has an optical head 22 arranged at a position corresponding to the access window 5A of the cartridge 2 held by the cartridge holder 15.

The optical head 22 includes an objective lens supporting device 25 having a parallel plate spring holding a objective lens 24 which is a constituent member of a moving optical system on a carriage 23 which is a moving means, and a constituent member of the moving optical system. A rising mirror (not shown) is mounted.

The optical head 22 has a double-acting linear motor 31 in a recess formed in a base frame 30 made of a non-magnetic member such as aluminum fixed to the bottom of the apparatus body 10.
Is included with. And the optical head 22
Can be moved along the lower surface side of the optical disc 6 in the direction of arrow C, that is, in the radial direction (track control direction) of the optical disc 6.

The carriage 23 has a plurality of rollers 32, each pair of which are supported by leaf springs on both sides thereof.
These rollers 32 ... Are movably supported in the radial direction (track control direction) of the optical disk 6 by rolling contact with two guide shafts (not shown) arranged in parallel. Has been done.

Further, radial coils (not shown) are attached to both sides of the carriage 23, and these radial coils are externally fitted to an inner yoke (not shown) which is a magnetic circuit forming member. ing.

The magnetic circuit is for providing a magnetic field for generating thrust in accordance with the electric power supplied to the radial coil, and the inner yoke and the outside and both ends of the inner yoke are connected to each other. The outer yoke 35,
It has a magnet (not shown) attached inside the outer yoke 35. Then, by supplying electric power to these radial coils, a propulsive force corresponding to the magnetic field supplied from the magnetic circuit is generated, and the carriage 2
A linear motor 31 for moving 3 is configured.

The objective lens 2 is attached to the carriage 23.
The objective lens supporting device 25 supporting 4 is incorporated. Also, a rising mirror is incorporated.

Further, the radial coil, the focus coil, and a flexible cable (not shown) for supplying electric power are connected. On the other hand, a fixed optical unit 40 is provided in the direction of the extension of the movement path of the optical head 22 in the outer peripheral direction of the optical disk 6, and serves as a light beam toward the moving optical system mounted on the optical head 22. The laser beam LB is irradiated.

The laser beam LB emitted toward this moving optical system is raised at a right angle by a raising mirror which is an optical element, and is focused on an information storage surface of the optical disc 6 through an objective lens 24. Further, the laser beam LB reflected by the information storage surface passes through the objective lens 24 and is then bent horizontally by the rising mirror to be fixed optical unit 40.
The information is sent to and processed.

The fixed optical unit 40 is not shown,
A semiconductor laser that generates a laser beam LB, a collimator lens that collimates a laser beam LB from the laser, and a laser beam LB that directs the laser beam LB from the laser to the optical disc 6 and a reflected laser beam reflected by the optical disc 6. No. 1 beam splitter, a second beam splitter for splitting the reflected laser beam LB reflected by the optical disk 6 into a first beam used for focus control and information reproduction and a second beam used for track control, It includes first and second focusing lenses for focusing the first and second beams, respectively, and first and second photodetectors for converting the respective beams into electric signals.

The upper surface of the base frame 30 in which the optical head 22 and the linear motor 31 are incorporated is a dustproof cover 51 made of a metal plate having an opening 50 for access.
Is screwed on.

As will be described later, the dust-proof cover 51 is provided with a ridge portion 51A, 51A which serves as a fixed guide 52 for preventing the optical disk 6 from colliding with the objective lens 24 during horizontal movement of the cartridge 2. ing.

Next, the loading mechanism 17 of the spindle motor 16 will be described with reference to FIGS. Fixed guide plates 60, 60 (only one of which is shown) serving as a pair of fixed guide members are arranged in parallel on both sides of the apparatus main body 10. Further, inside the fixed guide plates 60, 60, cam plates 61, 61 (only one is shown) as movable guide members are provided.

A plurality of guide rollers 62A and 62B are arranged on the cam plates 61 and 61, and these guide rollers 62A and 62B are fixed on the fixed guide plate 6.
A plurality of horizontal guide holes 63A, 63 formed in
It is in a state of being engaged with B. Then, the cam plate 61,
61 can be reciprocated only in the horizontal direction.

As shown in FIG. 6 and FIG. 7, the cam plates 61, 61 are provided with a plurality of cam holes 65A, 65B which are composed of two stepped horizontal portions and an inclined portion connecting them.

Then, the motor base 75 on which the spindle motor 16 is mounted is provided in a plurality of cam holes 65A, 65B formed by two stepped horizontal portions formed on the cam plates 61, 61 and an inclined portion connecting them. The guide rollers 81A and 81B projectingly provided on the spindle motor housing 80 integrated with are engaged with each other.

Further, the cam plates 61, 61 (only one is shown)
Of the pinion gears 91, 91 of the movable guide plate moving mechanism 90 serving as a movable guide member moving means.
Racks 92, 92 (only one of which is shown) that mesh with (only one of which is shown) are formed.

Then, the cam plates 61, 61 move in the direction of arrow E as the pinion gears 91, 91 rotate in the direction of arrow D, whereby the spindle motor housing 80 having the spindle motor 16 mounted therein moves in the direction of arrow F. It is supposed to rise to.

The ascending distance in this case is the distance required for the turntable 70 of the spindle motor 16 to come into contact with the optical disk 6 through the window 5A of the cartridge 2.

As a result, the spindle motor 16 is moved from the position shown in FIG. 6 to the recordable / reproducible position in which the optical disk 6 is mounted on the spindle motor 16 shown in FIG.

Further, the reverse rotation of the pinion gears 91, 91 causes the spindle motor 16 to move from a position capable of recording / reproducing to a position avoiding interference with the cartridge 2.

The movable guide plate moving mechanism 90
Has a configuration in which the driving force of a motor 95 that can be driven in both the forward and reverse directions is transmitted via a gear mechanism 96 to a shaft 97 to which the pinion gears 91, 91 are attached at both ends.

The spindle motor 16 is shown in FIG.
The configuration is as shown in FIG. The spindle motor 16 is roughly classified into a turntable 70 whose upper surface serves as a positioning surface in the surface direction of the optical disc 6, and a spindle 71 which is provided at the center of the turntable 70 and serves as a rotation shaft for holding the rotation center of the optical disc 6. And a motor section 72 for rotating and driving the spindle 71 and the turntable 70, and a motor base 75.

The turntable 70 has a ring shape and is fixed to the rotor 73 of the motor section 72.
Rotate with. Further, the upper surface 70A which is the medium supporting surface serves as a positioning surface in the surface direction of the optical disk 6.

A hollow disk-shaped chucking magnet (not shown) is provided at the inner bottom of the recess 70B formed in the inner diameter portion of the turntable 70, and the chucking magnet is fixed to the rotor 73. ing.

The chucking magnet is the optical disk 6
Magnetically attracting the metal hub portion 6B (see FIGS. 4 and 7) having the rotation center hole 6A provided in the rotation center portion of
The lower surface of the optical disk 6 is brought into close contact with the upper surface 70A serving as a positioning surface of the turntable 70, and the optical disk 6 is held integrally with the turntable 70 so as to rotate.

In FIG. 8, the spindle motor 16 is the above-mentioned rotor.
4 shows a state in which the optical disk 6 in the cartridge 2 is lifted by the binding mechanism 17 and mounted on the turntable 70. FIG. 9 shows a state in which the spindle motor 16 is in the retracted position and the turntable 70 is separated from the optical disk 6.

Cartridge body 4 of the cartridge 2
As shown in FIG. 10, ribs 4A and 4B as information recording medium guide portions for restricting unnecessary movement in the surface direction of the optical disk 6 are projected in both sides of the disk housing portion 100 and in the vicinity of the center thereof. It is set up.

Then, as shown in FIG. 8, the spindle motor 16 is raised and the optical disk 6 is moved to the turntable 70.
In the state where the optical disc 6 is mounted on the optical disc 6, the optical disc 6 is pushed up and separated from the rib 4A in the cartridge 2. Further, as shown in FIG. 9, when the spindle motor 16 is descended and the optical disc 6 is not mounted on the turntable 70, the optical disc 6 descends by its own weight and rotates to the rib 4A in the cartridge 2 as a center of rotation. The non-information storage unit on the side is supported.

In the case of the loading method in which the spindle motor 16 is moved up and down and the cartridge 2 is not moved up and down, since the cartridge 2 does not move up and down, the height position of the objective lens 24 and the height of the optical disk 6 of the cartridge 2 during horizontal movement. The position is quite close from the beginning.

On the other hand, the gap between the mutually facing surface portions of the ribs 4A and 4B that regulates the movement of the optical disk 6 in the surface direction can rotate the optical disk 6 mounted on the spindle motor 16 in a non-contact state with the cartridge body 4. The optical disc 6 is movable within the cartridge 2 by the amount of the looseness.

Therefore, when the optical disk 6 moves in the space inside the cartridge 2 due to vibration or the like, there is a fear of collision with the objective lens 24. However, in this embodiment, in order to avoid the above-mentioned concern, the objective lens 24 is provided in the vicinity of the possible position and the objective lens 24
Guide portions 52A, 5 are provided at a position (high position) away from the surface.
A fixed guide 52 having 2A is provided.

That is, in contrast to the dust-proof cover 51 having the access opening 50 for closing the upper surface of the base frame 30 in which the optical head 22 including the objective lens 24 and the linear motor 31 are incorporated, FIGS. As shown in FIG. 5, the flat upper end ridges 51A and 51A to be the guides 52A and 52A are drawn.

These ridges 51A and 51A are shown in FIG.
As shown in FIG. 12 and FIG. 12, it is formed in the vicinity of the possible position of the objective lens 24, that is, on both sides of the opening edge of the access opening 50 along the movement direction (arrow C direction) of the objective lens 24 in the tracking direction. Has been done. Ridge 5
Upper end surfaces of 1A and 51A, that is, guide portions 52A and 5
2A is formed to be higher than the surface of the objective lens 24 by a dimension H ₁ .

The dimension H ₁ is about 1.2 mm, which is set larger than the allowable downward movement amount of the optical disc 6 in the cartridge 2. Also, the ridge portion 5
As shown in FIG. 13, the height positions of 1A and 51A are higher than the height of the rib 4A as the information recording medium guide portion in the cartridge 2 which supports the non-information storage portion on the rotation center side of the optical disc 6 which is lowered by its own weight. It is set to be lower by the dimension H ₂ .

By forming this dimension H ₂ , the ridges 51A and 51A are prevented from pushing up the optical disk 6 itself. Therefore, the convex strip portion 51 serving as the fixed guide 52 is provided at a position near the position where the objective lens 24 can exist and at a position away from the surface of the objective lens 24.
Since A and 51A are provided, even if the optical disc 6 moves in the space inside the cartridge 2, as shown in FIGS. 14 and 15, the optical disc 6 collides with the ridges 51A and 51A and collides with the objective lens 24. You can definitely avoid doing this. As a result, the scratch on the objective lens 24 and the optical disc 6
It is possible to provide a highly reliable information processing device capable of preventing the damage of the.

In the above-described embodiment, the fixed guide 52 is formed by drawing the two ridges 51A and 51A on the dustproof cover 51 made of sheet metal, but with one or more ridges. It may be. Further, it is not limited to the ridge 51A having a flat upper end, but may be an ridge 51B having an arc shape as shown in FIG.

Further, the fixed guide 52 is used for the optical disk 6
Considering the collision with the dust cover 51, as shown in FIG.
The object can be achieved even if a guide member 53 made of, for example, a polyacetal resin, which is a member different from the above and has a small friction and a good slip due to the material of the optical disk 6, is attached. In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0057]

As described above, according to the present invention, the fixed portion for guiding the information storage medium has the guide portion in the vicinity of the position where the objective lens can exist and at the position separated from the surface of the objective lens. Since the guide is provided, even if the information storage medium moves in the space inside the cartridge, it is possible to reliably avoid the collision with the guide portion of the fixed guide and the collision with the objective lens. As a result, it is possible to provide a highly reliable information processing apparatus capable of preventing scratches on the objective lens and scratches on the optical disc 6.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view schematically showing an embodiment of an optical disc device which is an information processing device of the present invention.

FIG. 2 is a partial sectional plan view of the same.

FIG. 3 is a perspective view of a cartridge used in the optical disc of the embodiment.

FIG. 4 is a perspective view of the cartridge with the shutter open.

FIG. 5 is a perspective view showing a configuration of a main part of a loading mechanism of the spindle motor of the embodiment.

FIG. 6 is an explanatory view showing the state of the loading mechanism before loading.

FIG. 7 is an explanatory view showing a state of the loading mechanism after loading, similarly.

FIG. 8 is a cross-sectional side view of an optical disc device schematically showing a state in which the optical disc of the embodiment is mounted on a spindle motor.

FIG. 9 is a cross-sectional side view of the optical disk device schematically showing a state where the spindle motor is in the lowered retracted position and the optical disk is not mounted on the spindle motor.

FIG. 10 is a development view of a cartridge main body portion of a cartridge accommodating the optical disc of the embodiment.

FIG. 11 is a plan view of the dustproof cover according to the embodiment.

12 is a cross-sectional view taken along line XX of FIG.

FIG. 13 is an explanatory diagram showing a positional relationship in the main part of the embodiment.

FIG. 14 is an explanatory diagram showing a state in which a collision between the optical disc and the objective lens is avoided when the cartridge of the embodiment is inserted.

FIG. 15 is a partially enlarged view of FIG.

FIG. 16 is an explanatory view showing a first other embodiment of the guide member, which is a main part of the embodiment.

FIG. 17 is an explanatory view showing a second other embodiment of the guide member, which is a main part of the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disc device (information processing device), 2 ... Cartridge, 3 ... Shutter, 4 ... Cartridge body, 4A, 4B
... ribs (information recording medium guide section), 5A, 5B ... access window section, 6 ... optical disk (optical information storage medium),
6A ... Rotation center hole, 6B ... Hub part, 10 ... Device body, 1
DESCRIPTION OF SYMBOLS 1 ... Inserting / removing port, 15 ... Cartridge holder, 16 ... Spindle motor (medium driving means), 17 ... Loading mechanism, 20 ... Information processing means, 22 ... Optical head, 24 ... Objective lens, 25 ... Objective lens supporting device, 30 ... Base frame, 31 ... Linear motor, 50 ... Access opening, 51 ... Dust cover, 51A, 51A ...
B: ridge portion, 52 ... fixed guide, 52A ... guide portion, 5
3 ... Guide member, 70 ... Turntable, 71 ... Spindle.

Claims (5)

[Claims] 1. A cartridge accommodating an optical information recording medium is received, and a light beam is emitted to the information storage medium through an objective lens, so that at least the information storage medium is irradiated on the basis of reflected light from the information storage medium. In the information processing device for reproducing the stored information, a fixed guide for guiding the information storage medium is provided which has a guide portion in the vicinity of the possible position of the objective lens and at a position away from the surface of the objective lens. An information processing device characterized by being provided. 2. A cartridge which accommodates an optical information recording medium is received, and the information storage medium is mounted on a medium driving means movable in a direction orthogonal to the inserting / removing direction of the information storage medium to be rotationally driven. Irradiating a light beam to the rotationally driven information storage medium through an objective lens,
In an information processing device for reproducing at least information stored in an information storage medium based on reflected light from the information storage medium, a guide unit is provided near a position where the objective lens can exist and at a position distant from a surface of the objective lens. An information processing apparatus comprising: a fixed guide for guiding the information storage medium. 3. A cartridge accommodating an optical information recording medium is received, and a light beam is applied to said information storage medium through an objective lens, and at least the information storage medium is irradiated with the reflected light from said information storage medium. In an information processing device for reproducing stored information, a guide unit is provided near a position where the objective lens can exist and at a position lower than an information recording medium guide unit formed in the cartridge and higher than a surface of the objective lens. An information processing apparatus, wherein a fixed guide for guiding the information storage medium is provided. 4. A cartridge which receives an optical information recording medium is received, and the information storage medium is mounted on a medium driving means that is movable in a direction orthogonal to the inserting / removing direction of the information storage medium to be rotationally driven. Irradiating a light beam to the rotationally driven information storage medium through an objective lens,
In an information processing device for reproducing at least information stored in an information storage medium based on reflected light from the information storage medium, an information recording medium formed near the position where the objective lens can exist and in the cartridge. An information processing apparatus, comprising: a guide portion at a position lower than the guide portion and higher than the surface of the objective lens, and provided with a fixed guide for guiding the information storage medium. 5. A cartridge accommodating an optical information recording medium is received, and a light beam is emitted to the information storage medium through an objective lens, and at least the information storage medium is irradiated with the reflected light from the information storage medium. In an information processing device for reproducing stored information, in order to guide the information storage medium by having a guide part made of another member in the vicinity of the possible position of the objective lens and at a position distant from the surface of the objective lens. An information processing device, characterized in that a fixed guide is provided.