JPH10283756A - Disk-reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-quality disk-reproducing device for suppressing the occurrence of a collision noise when releasing a disk clamp between a slider cam groove and a guide groove that is retained and guided by the groove. SOLUTION: A slit 51 for giving an elasticity to a cam groove 10 is provided along with the cam groove 10 for guiding a rotation guide shaft 8 to a slider 9 while retaining the rotation guide shaft 8. As a result, when the disk clamp is released, the rotation guide shaft 8 is elastically retained from upper and lower directions in the cam groove 10 when a disk clamp is released, thus preventing the rotation guide shaft 8 from severely hitting against the wall of the cam groove 10 and hence preventing a collision noise when the disk clamp is released from occurring.

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 an optical disk such as a VD.

[0002]

2. Description of the Related Art A CD-ROM drive and a DVD drive with a built-in computer are provided by moving a tray on which an optical disk is mounted from a cabinet having a disk drive / reproducing mechanism such as an optical pickup, a disk motor, and a turntable along a disk surface direction. At present, the type of loading / unloading (loading / unloading) is the mainstream.
FIG. 15 and FIG. 16 show such a conventional disk drive.

In these figures, 81 is a disk drive cabinet, and 82 is a mechanical unit housed in the cabinet 81. The mechanical unit 82 includes a sub-chassis 84 that tilts around a fulcrum 83 within a certain angle range.
Is provided. This sub-chassis 84 is provided with a rotation guide shaft 85 protruding from the support
The state is switched between the inclined posture shown in FIG. 16A and the horizontal posture (disk clamp state) shown in FIG.

On the sub-chassis 84, a disk motor 88 directly connected to a turntable 87 and an optical pickup 8
9 and a pickup chassis 90 equipped with a pickup drive mechanism are supported via a buffer member 91 such as a damper rubber.

Further, a clamper 92 is attached to the mechanical unit 82 via a clamper holding plate 93 for holding the disk D while being attracted to the turntable 87 by magnetic force. The clamper holding plate 93 is provided with a hole for mounting a clamper, and the clamper 92 is fitted into the hole so as to be vertically movable within a certain distance.

Reference numeral 94 denotes a tray on which the disk D is mounted. The tray 94 is moved from the position where the tray 94 is discharged from the cabinet 81 by guide grooves 92 a provided on both sides of the mechanical unit 92.
It is supported and guided between the positions loaded inside.

As shown in FIG. 16A, when the tray 94 is being ejected, the sub-chassis 84 is in an inclined state, and the turntable 87 is at a position where the entrance path of the tray 94 is opened. When the tray 94 is inserted into the cabinet 81, the sub-chassis 84 moves around the fulcrum 83 as indicated by an arrow C.
Rotate in the direction. As a result, as shown in FIG. 16B, the disk D stored in the tray 94 is lifted from below by the turntable 87, and
And the disk is driven by the magnetic attraction force between the disk drive and the disk drive.

[0008]

FIG. 17 is a front view of a slider in the above-mentioned conventional disk drive, and FIG. 18 is a sectional view of the slider cam mechanism. In these figures, a slider 86 is slidably provided on a main chassis 82 in a direction perpendicular to a loading direction of a tray (not shown), and is pressed from above by a claw 82a formed on the main chassis 82 to prevent the slider 86 from falling off. Preventing. The slider 86 is provided with a cam groove 86a for guiding the guide 86 in the vertical direction while holding the rotation guide shaft 85 of the mechanical unit 82 in accordance with the sliding operation, and for holding the cam at a fixed vertical position. I have. In such a structure, the width of the cam groove 86a is slightly smaller than the diameter of the rotation guide shaft 85 in order to realize smooth conveyance of the rotation guide shaft 85 in the cam groove 86a of the slider 86. Is set to a large value. Therefore, just before the clamp is released, the rotation guide shaft 85 is moved by the cam groove 86a due to the attraction between the magnet of the clamper and the metal ring of the turntable.
At the moment when the disc clamp is released by the attraction between the magnet of the clamper and the metal ring of the turntable, the upper wall of the cam groove 86a until then. The rotation guide shaft 85 that has been drawn toward the cam groove 8 is caused by the gravitational acceleration.
6a collides with the lower wall. As a result, a loud collision sound is generated, and there is a problem that the user is uncomfortable. In recent years, there has been a tendency to increase the attraction force of a disk clamp in order to cope with high-speed reproduction of a disk, multi-layering (increase in weight), and the like, and the impact noise generated when the suction is released tends to increase.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and has a more inexpensive structure which suppresses the generation of a collision sound between a slider cam groove and a guide shaft which is held and guided by the slider cam groove when a disk clamp is released. The purpose is to provide a high quality disc playback device.

[0010]

According to a first aspect of the present invention, there is provided a disk reproducing apparatus comprising: a chassis having at least a disk drive mechanism; and a chassis provided with the disk drive mechanism. The guide shaft is elastically moved so as to move the chassis substantially in the thickness direction of the disk between a first position at which the disk drive is performed and a second position at which the disk is attached to and detached from the disk drive mechanism. And a movable member provided with a cam groove for guiding while holding.

According to a second aspect of the present invention, there is provided a disk reproducing apparatus according to a second aspect, wherein at least a chassis having a disk drive mechanism mounted thereon, a guide shaft provided on the chassis, and a disk driven by the chassis. The second position in which the disk is attached to and detached from the position 1 and the disk drive mechanism
And a cam groove for guiding while holding the guide shaft so as to be moved substantially in the disk thickness direction between the positions,
And a movable member having means for imparting elasticity to the guide shaft holding structure by the cam groove.

In these inventions, since the guide shaft provided on the chassis is guided while being elastically held in the cam groove of the movable member, the guide shaft is provided at the moment when the disk clamp is released. Can be prevented from violently colliding against the wall of the cam groove, and it is possible to prevent the generation of a collision sound when the disk clamp is released.

As a means for imparting elasticity to the cam groove, a structure in which a notch such as a slit is provided in the movable member along the cam groove can be considered. In this case, by selecting the distance between the cam groove and the notch and the thickness of the elastic portion between the cam groove and the notch, it is possible to cope with the difference in the magnitude of the impact received at the time of releasing the disk clamp from device to device. be able to.

The notch such as a slit is desirably provided at least on the side of the cam groove in the direction of movement from the first position to the second position of the chassis. By giving elasticity to at least the lower side of the cam groove in this way, the impact of the drop of the guide shaft when the disk clamp is released can be absorbed by the elastic portion between the cam groove and the slit, and the collision noise can be reduced. Can be almost completely eliminated.

Furthermore, in the disk reproducing apparatus of the present invention, at least a chassis on which a disk drive mechanism is mounted, a guide shaft provided on the chassis, and a disk drive of the chassis are performed. A cam groove for guiding while holding a guide shaft so as to move the disk substantially in the disk thickness direction between a position 1 and a second position at which the disk is attached to and detached from the disk drive mechanism; A movable member having a pressure contact portion elastically pressed against the chassis substantially in the direction of the disk surface within a predetermined movement range.

According to the present invention, in the predetermined moving range of the chassis including the moving range in which the disk clamp is released, the press-contact portion of the movable member is elastically pressed against the chassis substantially in the direction of the disk surface, thereby allowing the movable member and the chassis to be in contact with each other. By increasing the degree of interference, it is possible to reduce the impact at the time of releasing the disk clamp, and it is possible to suppress the collision sound to a level that causes no problem.

[0017]

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

As shown in FIGS. 1 and 2, the disk reproducing apparatus according to the present embodiment is configured such that a tray 1 on which a disk is mounted can be freely inserted into and removed from 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 constructed by supporting a mechanical chassis 3 having a disk reproducing mechanism via a plurality of cushioning members 4 such as damper rubber. 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. Disk motor 13
A turntable 16 is attached to the motor shaft.

As shown in FIGS. 3 and 4, rotating shafts 6 protrude from both sides on the rear side in the tray insertion direction of the reproducing mechanism unit 5, and these rotating shafts 6 are main. It is rotatably held by a shaft holder 7 (see FIGS. 1 and 2) of the chassis 2. Further, a rotation guide shaft 8 protrudes from a surface of the reproduction mechanism unit 5 on the labor side in the tray insertion direction, and the rotation guide shaft 8 is provided on a slider 9 that slides in the depth direction in FIG. Insert into groove 10
It is held and guided in the vertical direction (the thickness direction of the disk) along the cam 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 and unclamping.

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

FIG. 5 is a perspective view showing a tray loading / disc clamping mechanism, FIG. 6 is a plan view showing a state when the tray is ejected, FIG. 7 is a plan view showing a state when the tray loading is completed, and FIG. It is a top view showing the state at the time of completion.

In these figures, reference numeral 21 denotes a loading motor, and the power of this motor 21 is transmitted to a tray load gear 26 through a first pulley 22, a belt 23, a second pulley 24, and a 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 arrow X direction.

A slider transport gear 28 is meshed with the tray load gear 26. However, as shown in FIGS. 6 and 7, 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. 7, when the tray 1 is loaded to a predetermined position in the main chassis 2, the rotation guide shaft 31 of the slider 9 enters the guide groove 30 provided on the back surface of the tray 1, and The slider 9 slides in the direction of arrow Y by the guide of the rotation guide shaft 31 by the guide groove 30. 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 Y 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.

Further, by the movement of the slider 9, as shown in FIG. 4, the rotation guide shaft 8 of the reproducing mechanism unit 5 is guided upward according to the cam groove 10 of the slider 9, so that the reproducing mechanism unit 5 is moved upward. Rotates about the rotation shaft 6 in the direction of arrow R.

During the rotation of the reproducing mechanism unit 5, the disk 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. 8, at the time of completion of the disk clamp, the switch operation unit 33 provided at the left end of the slider 9 tilts 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 disc 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.

Further, the disc reproducing apparatus of the present embodiment is provided with a structure for reducing the left and right swing of the tray 1 during the transport of the tray. That is, as shown in FIGS. 5 to 10, synchronization racks 39a and 39b are provided at the left and right ends of the back surface of the tray 1, respectively. On the other hand, in the main chassis 2, synchronization pinion gears 38 a and 38 b meshing with the individual synchronization racks 39 a and 39 b are press-fitted at both ends of the connection shaft 40. Connecting shaft 4
10, one end is rotatably supported by a rotary support portion 45 integrally formed with the main chassis 2 and the other end is screwed to the main chassis 2 as shown in FIG. Is supported by the rotation support member 47 attached.

With this structure, the tray 1 is conveyed while the left and right synchronization racks 39a and 39b provided on the tray 1 and the synchronization pinion gears 38a and 38b are engaged with each other, so that the tray 1 swings right and left. It is possible to carry smoothly without any trouble.

Further, the synchronization pinion gears 38a, 38
The above-described slider 9 is slidably supported on the connection shaft 40 having the ends 8b fixed to both ends. That is, as shown in FIG.
8 is formed, and the connecting shaft 40 is fitted in the bearing portion 48 with a minimum necessary clearance.

As described above, in the present embodiment, one connecting shaft 40 is connected to each of the synchronization pinion gears 38a, 38b.
The shaft serves as a shaft for rotatably supporting the slider 9 and a shaft for movably supporting the slider 9. As a result, the structure for preventing noise during disk clamp / unclamp and the structure for preventing side-to-side sway during tray transport can be configured with fewer parts, increasing mechanical size and weight while maintaining high quality. It is possible to realize a disc reproducing apparatus that is minimized.

Next, the cam groove 10 provided in the slider 9
The relationship between the rotation guide shaft 8 of the reproducing mechanism unit 5 inserted and held in the cam groove 10 will be described in detail.

As shown in FIGS. 9 and 10, the slider 9 is provided with a cam groove 10 for holding and guiding the inserted rotary guide shaft 8 and a tilting process of the reproducing mechanism unit 5 (FIG. 9 ( b), the rotation guide shaft 8 in FIG.
A slit 51 for providing elasticity to the cam groove 10 is provided along the cam groove 10 at a portion 10b where the cam groove 10 is interfered with, that is, at a portion 10b where the cam groove 10 is obliquely cut. The groove width W1 of the portion 10b of the cam groove 10 is set to a value slightly smaller than or equal to the diameter W2 of the rotation guide shaft 8, and the groove width of the other portions 10a and 10c is The value is set slightly larger than the diameter W2. Therefore, the rotation guide shaft 8 is
The elastic portion 53 between the cam groove 10 and the slit 51 is bent when the rotary guide shaft 8
The groove width of the cam groove 10 is increased to the diameter dimension W2 of the rotation guide shaft 8, and the rotation guide shaft 8 is held in the cam groove 10 while receiving the repulsive force.

FIGS. 9B and 10B show the state in which the magnet of the clamper 12 and the metal ring of the turntable 16 are released from the position shown in FIG. 9C and the disk clamp is released. 3 shows an example of a positional relationship between the cam groove 10 and the rotation guide shaft 8 when the cam groove 10 is slightly displaced due to the magnitude of the suction force. The disc clamp is released during a period in which the rotation guide shaft 8 exists in the cut portion 10b.

Conventionally, the width of the cam groove of the slider has been set to a value slightly larger than the diameter of the rotation guide shaft over the entire area. At the moment when the disk clamp is released, the slider is drawn to the upper wall of the cam groove until then. The rotating guide shaft hit the lower wall of the cam groove with gravitational acceleration and generated a loud collision sound. On the other hand, in the present embodiment, when the disc clamp is released, the rotation guide shaft 8 is elastically held in the cam groove 10 from above and below.
The rotation guide shaft 8 does not move up and down vigorously within 0.
Of course, it is possible to avoid a problem that a collision sound is generated.

Also, in the present embodiment, the slit 51 is provided below the cam groove 10 to provide elasticity, so that the impact of the rapid drop of the rotation guide shaft 8 when the disk clamp is released can be applied to the cam groove 10. It can be absorbed by the elastic portion 53 between the slit 51 and the slit 51, so that the generation of the collision sound can be almost completely eliminated.

Further, in this embodiment, as shown in FIG. 11, by selecting the width of the elastic portion 53, particularly the width Wa of the elastic portions 53 at both ends of the slit 51, the magnitude of the impact received when the disk clamp is released is increased. Can be made to correspond to the difference of each device. Furthermore, by adjusting the thickness of the vicinity 51a or the periphery 51b of both ends of the slit 51, it is possible to cope with the difference in the magnitude of the impact received when the disk clamp is released, and to make the slit 5
(1) The strength of the peripheral portion can be increased.

Further, since the slider 9 is firmly supported by the connecting shaft 40, it is possible to prevent the slider 9 itself from moving up and down when the disk clamp is released and generating a collision sound.

In the present embodiment, the slit 51 is provided only on the lower side of the cam groove 10, but as shown in FIG.
Slits 51 and 52 may be provided above and below the cam groove 10 so as to be able to absorb an impact from either direction.

Further, in the above embodiment, the structure in which the cam groove 10 of the slider 9 elastically receives the rotation guide shaft 8 of the reproducing mechanism unit 5 from above and below has been described. A structure in which the unit 5 is elastically received from the disk surface direction is also conceivable.

For example, as shown in FIGS. 13 and 14, the elastic portion 5 between the cam groove 10 of the slider 9 and the slit 51 is provided.
3 is raised toward the reproduction mechanical unit 5, and the front end of the raised portion 55 presses the front wall 5 a of the reproduction mechanical unit 5 to rotate the rotation shaft 6 of the reproduction mechanical unit 5 (see FIG. 4).
A structure for alleviating the shock at the time of releasing the disk clamp by elastically sandwiching the reproducing mechanism unit 5 between the reproducing mechanical unit 5 and the reproducing mechanical unit 5 can be used. Also, it is needless to say that the effect of alleviating the shock at the time of releasing the disk clamp can be obtained by providing only the raised portion 55 without the slit in the slider 9.

[0044]

As described above, according to the present invention, since the guide shaft provided on the chassis is guided while being elastically held by the cam groove of the movable member, the disk clamp is released. At a moment or the like, the guide shaft does not violently collide with the wall of the cam groove, and it is possible to prevent the generation of a collision sound when the disk clamp is released.

Further, according to the present invention, in the predetermined moving range of the chassis including the moving range in which the disk clamp is released, the pressing portion of the movable member is elastically pressed against the chassis substantially from the disk surface direction to move the movable member. By increasing the degree of interference between the disk and the chassis, it is possible to reduce the impact at the time of releasing the disk clamp, and it is possible to suppress the collision sound to a level where there is no problem.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state when a tray of a disc reproducing apparatus according to an embodiment of the present invention is ejected.

FIG. 2 is a perspective view showing a state in which the tray of the disc reproducing apparatus of FIG. 1 is stored in the tray.

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

FIG. 4 is a side view and a sectional view of the disk reproducing apparatus of FIG. 1;

FIG. 5 is a perspective view showing a tray loading mechanism including a tray left-right wobble prevention structure of the disc reproducing apparatus of FIG. 1;

FIG. 6 is a plan view showing the state of the mechanism shown in FIG. 5 when the tray is ejected.

FIG. 7 is a plan view showing a state at the time of completion of tray loading of the mechanism of FIG. 5;

FIG. 8 is a plan view showing a state at the time of completion of disk clamping of the mechanism of FIG. 5;

FIG. 9 is a side sectional view showing a relationship between a cam groove of the slider and a rotation guide shaft of the reproducing mechanism unit.

FIG. 10 is a front sectional view showing a relationship between a cam groove of a slider and a rotation guide shaft of a reproducing mechanism unit, a tray lateral sway prevention structure, and a noise prevention structure at the time of disk clamp / unclamp.

FIG. 11 is a view showing details of a cam groove and a slit of the slider.

FIG. 12 is a diagram showing a modification of the cam groove of the slider.

FIG. 13 is a plan view and a sectional view showing another embodiment of the noise prevention structure at the time of disc clamping / unclamping according to the present invention.

14 is a side sectional view showing the operation of the noise prevention structure of FIG.

FIG. 15 is a perspective view showing a conventional disk drive.

16 is a side sectional view of the disk drive of FIG.

17 is a plan view showing a slider in the disk drive in FIG.

18 is a sectional view of the slider of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tray 2 ... Main chassis 3 ... Mechanical chassis 5 ... Reproduction mechanical unit 8 ... Rotation guide shaft 9 ... Slider 10 ... Cam groove 12 ... Clamper 13 ... Disk motor 14 ... Optical pickup 16 Turntable 21 Loading motor 38a, 38b Synchronization pinion gear 39a, 39b Synchronization rack 40 Connection shaft 45 Rotation support part 47 Rotation support member 48 Slider Bearings 51, 52 Slit 53 ... Elastic part of slider 55 ... Raised part of slider

Claims (8)

[Claims] 1. A chassis on which at least a disk drive mechanism is mounted; a guide shaft provided on the chassis; a first position where the chassis is driven by a disk; A movable member provided with a cam groove for guiding the guide shaft while elastically holding the guide shaft so as to move the guide shaft substantially in the thickness direction of the disk between the second position and the second position. Playback device. 2. A chassis on which at least a disk drive mechanism is mounted; a guide shaft provided on the chassis; a first position where the chassis is driven by a disk; A cam groove for holding and guiding the guide shaft so as to be moved substantially in the disk thickness direction between the second position and the second position, and for providing elasticity to a structure for holding the guide shaft by the cam groove. And a movable member having the above-mentioned means. 3. A chassis on which a disk drive mechanism is mounted; a clamp member for holding the disk between the disk drive mechanism and the mechanism while adsorbing the disk drive mechanism; a guide shaft provided on the chassis; Between a first position at which the disk is driven while the disk is held between the clamp member and the disk drive mechanism, and a second position at which the disk is attached to and detached from the disk drive mechanism. A movable member having a cam groove for guiding the guide shaft while elastically holding the guide shaft so as to move the guide shaft substantially in the thickness direction of the disk. 4. A chassis on which a disk drive mechanism is mounted; a clamp member for holding a disk between the disk drive mechanism and the mechanism while adsorbing the disk drive mechanism; a guide shaft provided on the chassis; Between a first position at which the disk is driven while the disk is held between the clamp member and the disk drive mechanism, and a second position at which the disk is attached to and detached from the disk drive mechanism. A cam groove for guiding while holding the guide shaft so as to be moved substantially in the disk thickness direction, and a movable member having means for imparting elasticity to the guide shaft holding structure by the cam groove. A disk reproducing apparatus, comprising: 5. The disc reproducing apparatus according to claim 1, wherein the means for imparting elasticity to the holding structure of the guide shaft by the cam groove is provided on the movable member along the cam groove. A disc reproducing apparatus characterized by being provided with a notch. 6. The disc reproducing apparatus according to claim 5, wherein the notch is provided at least on a side of the cam groove in a moving direction of the chassis from the first position to the second position. A disk reproducing apparatus characterized by the above-mentioned. 7. A chassis on which at least a disk drive mechanism is mounted, a guide shaft provided on the chassis, a first position where the chassis is driven by a disk, and mounting and dismounting of a disk with respect to the disk drive mechanism. And a cam groove for guiding the guide shaft while holding the guide shaft so as to be moved substantially in the disk thickness direction between the second position and the second position. And a movable member having a press-contact portion elastically pressed against the disc. 8. A chassis on which at least a disk drive mechanism is mounted; a clamp member for holding the disk between the disk drive mechanism and the mechanism while adsorbing the disk drive mechanism; a guide shaft provided on the chassis; A first position where the disk is driven while the disk is held between the clamp member and the disk drive mechanism, and a second position where the disk is attached to and detached from the disk drive mechanism. A cam groove for holding and guiding the guide shaft so as to move the chassis substantially in the thickness direction of the disk, and is elastically pressed against the chassis substantially in the disk surface direction within a predetermined movement range of the chassis. A disk reproducing device comprising: a movable member having a pressing portion.