JPH10134467A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drastically reduce probability of occurrence of a disk clamping mistake by regulating shaking of a chassis during the time of moving a 1st chassis mounted with a reproducing mechanism of an optical pickup, a disk motor and a turntable, etc., into an executing position of reproducing a disk until completion of disk clamping by a regulating means. SOLUTION: In order to regulate the shaking of a mechanical chassis 3 on a reproducing mechanical unit at the time of unclamping the disk, the mechanical chassis 3 is provided with a guide shaft 61, and also a main body part of the reproducing mechanical unit is provided freely slidably with a lock slider 65 having a guide hole 63 to be engaged with a guide shaft of this main body part. At the time of unclamping the disk, by restricting the guide shaft with a hole part 71 in a shape corresponding to an external form of the guide shaft in the guide hole, the shaking of the mechanical chassis 3 is stopped accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-ROM,
The present invention relates to a disk reproducing apparatus for reproducing or recording / reproducing an optical disk such as a VD.

[0002]

2. Description of the Related Art Compact discs, laser discs,
In a disk drive for reproducing an optical disk such as a digital video disk (DVD), as a measure against external vibration,
For example, a structure is adopted in which a mechanical chassis on which a disk drive / playback mechanism such as an optical pickup and a disk motor is mounted is supported by a support member via a buffer member such as a damper cushion.

[0003] In particular, a digital video disk (hereinafter referred to as a DVD) known as a high-density optical disk.
Since the track pitch is as narrow as about half that of a compact disk or a laser disk, and the effect of extraneous vibration on the disk reading is large,
In the disk drive for reproduction of D, it is required to have a vibration-proof structure having more excellent vibration absorption.

In order to increase the vibration absorbing force, a method of increasing the floating amount of the mechanical chassis supported via the damper cushion is considered. However, if the floating amount is increased, the mechanical chassis will roll more when an external impact is applied, and even if there is no problem during disk playback, the mechanical chassis will move until it reaches the disk clamp state. In the process,
There is a possibility that the amount of misalignment between the center hole of the disc mounted on the tray and the centering member at the center of the turntable will increase beyond the range in which the misalignment between them can be corrected. In such a case, the disc is not placed on the turntable in a correct posture, and the disc clamp fails.

[0005]

As described above, in the conventional disk reproducing apparatus, when the floating amount of the mechanical chassis supported via the damper cushion is increased in order to increase the shock absorbing force, a disk clamp state is reached. When a shock is applied during the movement process of the mechanical chassis, the amount of misalignment between the center hole of the disc mounted on the tray and the centering member at the center of the turntable increases, and the centering member fits correctly in the center hole of the disc. There was a problem that the disc clamp would end up failing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is directed to a case where a chassis on which a reproducing mechanism such as an optical pickup, a disk motor, and a turntable is mounted is moved to a reproduction execution position to achieve a disk clamp. It is an object of the present invention to provide a disc reproducing apparatus capable of preventing the occurrence of disc clamping errors by restricting the swing of the disc.

[0007]

In order to achieve the above object, a disk reproducing apparatus according to the present invention has a reproducing mechanism for driving and reproducing a disk. A first chassis, a second chassis supporting the first chassis via an elastic member, and a moving means for moving the second chassis between a position at which the reproduction of the disc is executed and a non-executed position And regulating means for regulating the swing of the first chassis on the second chassis when the second chassis is at the position where the disk reproduction is not performed.

According to a second aspect of the present invention, there is provided a disk reproducing apparatus, comprising: a first chassis having a reproducing mechanism for driving and reproducing a disk;
A second chassis supporting the chassis through an elastic member, moving means for moving the second chassis between a position where the reproduction of the disc is executed and a non-execution position,
When the chassis is in the disk playback execution position, the first
A disc holding member for holding a disc in a rotatable state between the disc and a reproducing mechanism on the first chassis, and a first disc on the second chassis when the second chassis is at a position where the disc is not reproduced. And a regulating means for regulating the shaking of the chassis. Further, according to a third aspect of the present invention, there is provided a disk reproducing apparatus comprising:
A first chassis having a reproducing mechanism for driving and reproducing a disk, a second chassis supporting the first chassis via an elastic member, and reproducing the disk from the second chassis are executed. Moving means for moving between a position to be executed and a non-executing position, and a first means for moving the first chassis on the second chassis while at least the second chassis is moved from the non-executing position to the executing position for playing a disk by the moving means. And a regulating means for regulating the shaking of the chassis.

Further, according to a fourth aspect of the present invention, there is provided a disk reproducing apparatus comprising: a first chassis on which a reproducing mechanism for driving and reproducing a disk is mounted; A second chassis supported via a member, moving means for moving the second chassis between a position where the disk reproduction is executed and a position where the disk reproduction is not executed, and the second chassis being moved to a position where the disk reproduction is executed A disk holding member for rotatably holding the disk between the disk and a reproducing mechanism on the first chassis; and a moving means for moving at least the second chassis from the disk non-executing position to the execution position. Regulating means for regulating the swinging of the first chassis on the second chassis during the movement of the first chassis.

According to the present invention, the first chassis mounted with a reproducing mechanism, such as an optical pickup, a disk motor, and a turntable, is moved to a position where the disk is reproduced and the chassis is moved until the disk is clamped. The shaking can be regulated by the regulating means, and the probability of occurrence of disc clamping errors can be greatly reduced.

[0011]

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

As shown in FIGS. 1 and 2, the disc reproducing apparatus according to the present embodiment is configured such that a tray 1 on which a disc is mounted can be taken in and out of a main chassis 2 as a drive main body. Guide protrusions 1a are provided on both side surfaces of the tray 1. These guide projections 1a are fitted into guide portions 2a provided on the main chassis 2, whereby the tray 1 is guided in a linear direction parallel to the disk surface, and the tray discharge position shown in FIG. Conveyed to and from the position.

As shown in FIGS. 1 to 3, the main chassis 2 has a reproducing mechanism configured by supporting a mechanical chassis 3 having a disk reproducing mechanism via a plurality of buffer members 4 such as a damper cushion. Unit 5 is arranged. On the mechanical chassis 3, a disk motor 13, an optical pickup 14, an optical pickup feed mechanism, and the like are mounted. The disk motor 13 is fixed on the mechanical chassis 3 via a motor mount 15. A turntable 16 is attached to a motor shaft of the disk motor 13.

As shown in FIGS. 3 and 4, rotating shafts 6 are protruded from both sides on the back side in the tray insertion direction of the reproducing mechanism unit 5, and these rotating shafts 6 It is rotatably held by a shaft holder 7 (see FIGS. 1 and 2) of the chassis 2. A rotation guide shaft 8 protrudes from the surface of the reproduction mechanism unit 5 on the labor side in the tray insertion direction. The rotation guide shaft 8 is provided on a guide 9 provided on a slider 9 that slides in the depth direction in FIG. The slider 9 is inserted and held in the groove 10, and is guided in the vertical direction (the thickness direction of the disk) along the guide groove 10 as the slider 9 moves. As a result, the reproducing mechanism unit 5 is configured to tilt about the rotation shaft 6 as a fulcrum and perform disc clamping.

As shown in FIGS. 1 and 2, the main chassis 2 is provided with a clamper 1 via a clamper holder 11.
2 are held. Further, a mechanism system for tray loading and disk clamping is provided in the main chassis 2.

Next, the details of the tray loading and disc clamping mechanism and its operation will be described.

FIG. 5 shows the state when the tray is discharged, FIG. 6 shows the state when the tray loading is completed, and FIG. 7 shows the state when the disc clamp is completed.

In FIG. 5, reference numeral 21 denotes a loading motor.
The power is transmitted to the tray load gear 26 through the belt 23, the second pulley 24, and the reduction gear 25. A rack 27 provided on the tray 1 is meshed with the tray load gear 26, whereby the tray 1 is loaded in the direction of arrow X1.

A slider transport gear 28 meshes with the tray load gear 26. However, during the loading period of the tray 1, the slider transport gear 28 is not engaged with the rack 29 of the slider 9.

As shown in FIG. 6, when the tray 1 is loaded to a predetermined position in the main chassis 2, the guide pins 31 of the slider 9 enter the guide grooves 30 provided on the back surface of the tray 1, and Guide pin 3 by 30
With the guidance of No. 1, the slider 9 slides in the arrow Y1 direction. This movement of the slider 9 causes the rack 29 of the slider 9 to mesh with the slider transport gear 28, and the slider 9 further slides in the Y1 direction by the power of the loading motor 21. At this point, the engagement between the tray load gear 26 and the rack 27 of the tray 1 is released, and the loading of the tray 1 is completed.

The movement of the slider 9 causes the rotation guide shaft 8 of the reproducing mechanism unit 5 to move as shown in FIG.
Is guided upward along the guide groove 10 of the slider 9, so that the reproducing mechanism unit 5 rotates in the direction of arrow R with the rotation shaft 6 as a fulcrum.

During the rotation of the reproducing mechanism unit 5, the disc D mounted on the tray 1 is lifted from the tray 1 by the turntable 16. Thereafter, due to the approach between the disc chuck portion 32 of the turntable 16 and the clamper 12, the disc chuck portion 32 is completely fitted into the center hole of the disc D due to the magnetic attraction force therebetween. Is completed. As shown in FIG. 7, at the time of completion of the disk clamp, the switch operation unit 33 provided at the left end of the slider 9 pushes the switch 35 to the back via the lever 34. Thus, the switch 35 detects the completion of the disk clamp and outputs a detection signal to the controller. When the controller receives the disc clamp completion detection signal, the loading motor 21
Stop driving.

The release of the disk clamp and the unloading of the tray are performed in the reverse order of the above operation by rotating the loading motor 21 in the reverse direction.

The disc reproducing apparatus is provided with a mechanism for preventing the mechanical chassis 3 supported by the reproducing mechanism unit 5 via a damper cushion from swinging when the disc is unclamped. Such a mechanism will be described with reference to FIGS. 3, 8, and 9. FIG.

The mechanical chassis 3 is provided with two guide shafts 61 and 62 for such a mechanical chassis swing preventing mechanism by outsert molding or the like. The main body of the reproduction mechanism unit 5 is provided with two lock sliders 65 and 66 having guide holes 63 and 64 for engaging and guiding the guide shafts 61 and 62, respectively. One lock slider 65 is slidable in the Y-axis direction, and the other lock slider 66 is slidable in the X-axis direction.
The lock sliders 65 and 66 are connected via a connecting portion 67 and are configured to interlock with each other. Further, one lock slider 65 is urged rightward in the figure by an elastic member 68 such as a spring, and the other lock slider 66 is urged rearward in the figure. Further, one lock slider 65 is provided with a projection 70 which comes into contact with a lock slider operation section 69 provided on the slider 9 of the tray loading mechanism.

Next, the operation of the mechanical chassis swing prevention mechanism will be described.

FIG. 8 shows a state when the disk is unclamped. At this time, each of the lock sliders 65 and 66 has moved to the end in the biasing direction by the spring 68, and each of the guide shafts 61 and 62 of the mechanical chassis 3
5 and 66 are located at one end of the guide holes 63 and 64.

As shown in FIG. 10A, the guide hole 6
Each of the ends 3 and 64 has a hole 71 having a shape corresponding to the outer shape of the guide shafts 61 and 62 at one end thereof. The guide shaft 61 (62) fits into the hole 71 when the disk is unclamped. Thus, the movement of the guide shafts 61 and 62 in the X / Y-axis directions is restricted. Further, as shown in FIG. 10B, the receiving base 7 provided on one lock slider 65 at this time.
The height position of the mechanical chassis 3 on the reproducing mechanical unit 5 is kept constant by mounting the rib 73 of the one guide shaft 61 on 2. Therefore, when the disk is unclamped, the mechanical chassis 3 is fixedly held at the fixed position of the reproducing mechanical unit 5, and the mechanical chassis 3 is prevented from swinging against an externally applied impact.

After the pull-in of the tray 1 is completed, as shown in FIG. 9, when the slider 9 is further slid in the Y1 direction, the lock slider operating portion 69 of the slider 9 hits the projection 70 of one of the lock sliders 65. By pressing, one lock slider 65 slides in the Y1 direction while opposing the urging force of the spring 68, and at the same time, the other lock slider 66 slides in the X2 direction. When the disk clamp is completed, the guide shafts 63 and 64 recede from the positions of the holes 71 for restricting the movement of the guide holes 63 and 64 of the lock sliders 65 and 66, and FIG.
When the rib 73 of the guide shaft 61 retreats from the receiving base 72 of the lock slider 65 as shown in (c), the swing suppression state of the mechanical chassis 3 is released.

Therefore, according to the mechanical chassis swing preventing mechanism, when the disk is unclamped, the mechanical chassis 3 is fixedly held at the fixed position of the reproducing mechanical unit 5,
Since the mechanical chassis 3 is prevented from swinging against an externally applied impact, even if an impact is applied during the movement process of the reproducing mechanism unit 5 until the disk clamp state is reached, the disk mounted on the tray 1 Of the center hole of the turntable and the centering member at the center of the turntable do not increase more than the allowable value. Therefore, even if the floating amount of the mechanical chassis 3 is increased in order to enhance the vibration absorption, a reliable disk clamp is assured.

[0031]

As described above, according to the present invention, it is necessary to move the chassis on which the reproducing mechanism such as the optical pickup, the disk motor, and the turntable is mounted to the position for executing the disk reproduction to achieve the disk clamping. Of the chassis can be restricted, and as a result, the probability of occurrence of disc clamping errors can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a tray of a disc reproducing apparatus according to an embodiment is ejected.

FIG. 2 is a perspective view showing a state of the disk reproducing apparatus of FIG. 1 during reproduction.

FIG. 3 is an exploded perspective view showing a configuration of a reproducing mechanism unit in the disc reproducing apparatus of FIG. 1;

FIG. 4 is an internal side view of the disc reproducing apparatus of FIG. 1;

FIG. 5 is a plan view showing a state when the tray of the disc reproducing apparatus of FIG. 1 is ejected;

FIG. 6 is a plan view showing a state at the time of completion of tray loading of the disc reproducing apparatus of FIG. 1;

FIG. 7 is a plan view showing a state at the time of completion of disk clamping of the disk reproducing apparatus of FIG. 1;

FIG. 8 is a plan view showing the state of the reproducing mechanism unit when the disk is unclamped.

FIG. 9 is a plan view showing the state of the reproducing mechanism unit during disk clamping.

FIG. 10 is a diagram showing a detailed structure of a mechanical chassis swing prevention mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tray 3 ... Mechanical chassis 4 ... Buffer member 5 ... Reproducing mechanical unit 9 ... Slider 12 ... Clamper 16 ... Turn table 32 ... Disc chuck part 32 61,62 ... Guide shaft 63,64 ... Guide holes 65, 66 ... Lock slider 69 ... Lock slider operation section

Claims (5)

[Claims] 1. A first chassis having a reproducing mechanism for driving and reproducing a disk, a second chassis supporting the first chassis via an elastic member, and a second chassis Moving means for moving between a position where the reproduction of the disc is executed and a non-execution position; and when the second chassis is at the position where the reproduction of the disc is not executed, the second chassis is located on the second chassis. 1. A disc reproducing apparatus comprising: a regulating means for regulating a swing of the chassis. 2. A first chassis having a reproducing mechanism for driving and reproducing a disk, a second chassis supporting the first chassis via an elastic member, and a second chassis Moving means for moving the disc between a position where the reproduction is executed and a non-execution position; and the reproducing mechanism on the first chassis when the second chassis is at the position where the disk reproduction is executed. A disk holding member for holding the disk in a rotatable state between the first chassis and the second chassis on the second chassis when the second chassis is at a position where the disk reproduction is not performed; A disc reproducing apparatus, comprising: a regulating means for regulating shaking. 3. A first chassis having a reproducing mechanism for driving and reproducing a disk, a second chassis supporting the first chassis via an elastic member, and a second chassis. Moving means for moving between a position where the reproduction of the disc is executed and a non-executing position, at least while the second chassis is moved from the non-executing position of the disc reproducing to the executing position by the moving means; A disk playback device, comprising: a restriction unit configured to restrict a swing of the first chassis on the second chassis. 4. A first chassis having a reproducing mechanism for driving and reproducing a disk, a second chassis supporting the first chassis via an elastic member, and a second chassis Moving means for moving the disc between a position where the reproduction is executed and a non-execution position; and the reproducing mechanism on the first chassis when the second chassis is at the position where the disk reproduction is executed. A disk holding member for holding the disk in a rotatable state between the second chassis and the second chassis while at least the second chassis is moved from a disk non-execution position to a disk reproduction position by the moving means. A disk playback device comprising: a restriction unit configured to restrict a swing of the first chassis on the chassis. 5. The disk reproducing apparatus according to claim 1, further comprising a tray conveying means for conveying a tray on which the disk is mounted to a position where the disk is reproduced. A reproducing mechanism on a chassis, wherein the tray conveyed to the disk reproduction execution position by the tray conveyance means while the second chassis is moved from the disk reproduction non-execution position to the execution position by the moving means; A disc reproducing apparatus for extracting the disc from a disc.