JP2002288914A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mitigate shocks to a movable base driving mechanism that is elevated or lowered in conjunction with tray movement. SOLUTION: A second slider 28 of a movable base driving mechanism 26 is regulated for movement in a direction D by abutting of an abutting part 87c disposed at the tip of a leaf spring 87 on the first and second projections 76 and 77 of a first slider 27, and moved integrally with the first slider 27 driven by a driving gear 29. Since the second slider 28 is not moved freely in the direction D even when the pin 23 of a movable base 16 presses inclined grooves 89 and 90, the front end of the movable base 16 is lowered at a speed set in accordance with the driving position of the first slider 27. When the front end of the movable base 16 is lowered, the front end of the movable base 16 is not suddenly lowered, so that the hole 86 of the second slider 28 does not collide with an engaging pin 73, and the pin 23 of the movable base 16 prevents the generation of shocks or shock sounds when the movable base 16 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly, to a disk drive provided with a tray-type disk loading mechanism having a tray on which a disk-shaped recording medium (hereinafter referred to as "disk") is mounted and movable. It relates to a disk device.

[0002]

2. Description of the Related Art As a conventional disk device, for example,
As disclosed in JP-A-11-39842, CD-
2. Description of the Related Art There is a disk device in which a movable base having a turntable moves upward when a tray on which a disk such as a ROM is mounted is moved into the device, clamps the disk, and rotates the disk.

In the disk device described in this publication,
A tray movably provided between the disk exchange position and the disk storage position, a movable base for supporting the turntable and the pickup, a clamper for clamping the disk between the turntable, and the tray in the disk storage position. And a movable base drive mechanism driven by a motor to move the movable base so as to clamp the disk between the turntable and the clamper when moved. The movable base drive mechanism is configured to engage the first movable base drive member on the drive side with the first movable base drive member and to drive the movable base up and down to the disk accommodation position or the disk exchange position. And a movable base drive member.

In this disk drive, the rotational driving force of a motor for driving the tray is transmitted to a rack provided on the tray via a drive gear to move the tray to a disk replacement position or a disk storage position. Further, in the disk device, a drive gear for driving the tray is also meshed with the rack of the first movable base drive member, so that the tray and the movable base can be driven by one motor. ing.

A movable base for supporting the turntable and the pickup and a second movable base driving member for operating the movable base for preventing vibration from being transmitted to the turntable and the pickup are supported in a floating state by insulator rubber. The first movable base drive member provided on the chassis and driven by the drive gear is provided on a fixed portion supporting the chassis.
The movable base has a protruding pin that engages with the inclined groove provided in the second movable base driving member, and the protruding pin moves in the horizontal direction when the second movable base driving member slides. It moves up and down along the inclined groove.

However, in the conventional disk drive having the above-described structure, the movable base is moved up and down via a movable base drive mechanism which interlocks with the movement of the tray to the disk exchange position or the disk storage position. Because of this configuration, for example, it is necessary to lower the movable base immediately before the tray is moved from the disk storage position to the disk replacement position by an eject operation to operate the tray so as not to collide with the turntable or the pickup.

At this time, in the conventional disk drive, since the movable base descends due to the weight of the turntable or the like, the protruding pin of the movable base presses the inclined groove of the second movable base drive member to cause the second movable base drive member to move. There has been a problem that an impact and an impact sound are generated due to the movement of the backlash.

Further, in the conventional disk drive, the disk mounted on the tray may be displaced from the tray mounting position due to an impact when the movable base descends due to the weight of the turntable or the like. Further, in the conventional device, since the drive gear meshes with the rack provided on one side of the tray, the clearance between the guide portion provided on the other side of the tray and the fitting portion fitted to this guide portion is relatively small. The setting was large, and the rattling of the tray was large. For this reason, when the tray is moved to the disk exchange position or the disk storage position, the tray rattles in a direction orthogonal to the moving direction, so that the noise is large. Therefore, an object of the present invention is to provide a disk device that solves the above-mentioned problems.

[0008]

The present invention has the following features to solve the above-mentioned problems. Claim 1
The described invention regulates the movable base from descending prior to the operation of the movable base driving member in the process of lowering the tray from the disk storage position to the disk exchange position, and the movable base drops by its own weight. To prevent that.
In addition, the impact due to the lowering of the movable base is reduced, and the disc is prevented from being displaced from the tray mounting position due to the impact.

According to the second aspect of the present invention, the second movable base drive member is prevented from moving prior to the operation of the first movable base drive member during the process of lowering the tray from the disk storage position to the disk replacement position. This prevents the movable base from pressing the second movable base driving member and dropping by its own weight.

According to the third aspect of the present invention, the regulating means is provided between the first movable base driving member and the second movable base driving member, and the second movable base driving member is operated by the operation of the first movable base driving member. The movable base is prevented from moving the second movable base driving member, and the movable base is prevented from dropping by its own weight.

According to a fourth aspect of the present invention, the first movable base driving member is movably provided on the fixed portion, and the second movable base driving member is movably mounted on the chassis supported in a floating state with respect to the fixed portion. The movable base supported in a floating state is prevented from moving the second movable base driving member, and the movable base is prevented from dropping by its own weight.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an embodiment of a disk drive according to the present invention. FIG. 2 is a plan view showing a state where the tray 12 is removed while leaving the guide groove of the tray 12. FIG. 3 is a front view showing the structure near the movable base driving mechanism 26. As shown in FIGS. 1 to 3, the disk device 11 is a CD-ROM device, and
When the tray 12 on which the OM (disk-shaped recording medium) is placed is located between the disk exchange position or the disk accommodation position,
It is mounted movably in the B direction. Tray 12
Is movably supported by a chassis 13 fixed to a personal computer body or the like.

The floating chassis 14 is mounted on the chassis 13 so as to be supported in a floating state. That is, between the front side of the floating chassis 14 and the chassis 13, the insulator rubber 15 for absorbing vibration is interposed at a plurality of locations. A movable base 16 whose front end is raised and lowered with the rear end as a fulcrum is rotatably supported by the floating chassis 14.

Further, a clamper holder 17 is attached to the floating chassis 14 from above. The clamper holder 17 has both ends of the floating chassis 14 so as to lie above the floating chassis 14.
Fixed to both sides of the In the center hole 17a of the clamper holder 17, a clamper 18 for holding the peripheral portion of the center hole of the disk is rotatably mounted.

A turntable 19 for rotatably supporting the disk and a disk motor 20 for rotating the turntable 19 are supported on the upper surface of the movable base 16. A pickup 21 for optically reading information recorded on the recording surface of the disk is provided in the upper opening 16a of the movable base 16 so as to be movable in the disk radial direction (A and B directions).

A leaf spring 22 is attached to one end of the movable base 16. Floating chassis 1
4 is provided with an insulator rubber 1 against the chassis 13.
5 is supported in a floating state. And
At the other end of the movable base 16, a pair of pins 23 to which the driving force of the elevating operation is transmitted project in the A direction.

A front bezel 24 is mounted on the front side of the chassis 13. Front bezel 24 is tray 12
Has an opening 25 for passing when moving. Therefore, when performing disk replacement, the tray 12 is pulled out in the direction A from the opening 25 of the front bezel 24. And
When loading a disc, the tray 12 on which the disc is placed moves in the direction B, passes through the opening 25, and is drawn into the disc storage position in the apparatus.

A movable base drive mechanism 26 for raising and lowering the other end of the movable base 16 is provided in front of the chassis 13 and the floating chassis 14. The movable base drive mechanism 26 moves the upper surface of the chassis 13 to C,
First slider 27 slidably mounted in direction D
And a second slider 28 mounted on the upper surface of the floating chassis 14 so as to be slidable in the C and D directions.

A drive motor 106 (shown in FIG. 3) for driving the movable base drive mechanism 26 is mounted on the chassis 13 and drives the drive gear 29 via a group of reduction gears (not shown). The drive motor 106 is driven and controlled by a control signal from a control circuit (not shown) so that the rotation direction is switched, raises and lowers the other end of the movable base 16, and moves the tray 12 in the A and B directions. It also functions as a drive source for the operation.

Here, the configuration of the tray 12 will be described. As shown in FIG. 1, the tray 12 has an annular disk mounting portion 30 on the upper surface side of which a disk is mounted. An opening 31 is provided inside the disc mounting portion 30 so that the turntable 19 and the pickup 21 face each other. Further, a stopper 12a for moving to the disk replacement position is provided at the rear of the left side surface of the tray 12.

FIG. 4 is a view showing the structure of the tray 12.
(A) is a bottom view of the tray 12 as viewed from below, (B) is a side view showing an enlarged view of a rack introduction portion of the tray 12, (C).
FIG. 4 is an enlarged bottom view showing a rack introduction portion of the tray 12. As shown in FIG. 4A, a rack 40 is formed on the lower surface of the tray 12 so as to extend in the A and B directions to mesh with the drive gear 29 driven by the drive motor 106. On the lower surface of the tray 12, a first guide groove 42 for guiding the sliding operation of the first slider 27 and a second guide groove 44 for guiding the sliding operation of the second slider 28 are provided. The first guide groove 42 has tray 1 on both sides.
2 comprises a space surrounded by walls 42a and 42b protruding from the lower surface. Then, when the pin 73 passes through the inclined portion 42c of the first guide groove 42, the first slider 27
Move in the direction.

The first guide groove 42 is provided at a position overlapping the opening 31 of the upper tray 12 in the A and B directions. Therefore, when the pin 73 of the first slider 27 is at a position facing the opening 31, the pin 73 is not fitted in the first guide groove 42, and the first slider 27 relatively moves in the process of reaching the disk accommodation position. The guide groove 42 is fitted. The second guide groove 44 has trays 1 on both sides similarly to the first guide groove 42.
2 comprises a space surrounded by walls 44a and 44b projecting from the lower surface. The second slider 28 moves in the C and D directions when the pin 83 passes through the inclined portions 44c and 44d of the second guide groove 44.

On both sides of the lower surface of the tray 12, sliding portions 46 and 47 extending in the directions A and B are provided integrally. The tray 12 has an opening 12 through which the disc pressing pieces 16b and 16c of the movable base 16 enter.
b, 12c are provided.

As shown in FIGS. 4B and 4C, the rack 40 is provided with a pair of wide teeth 40a at an introduction portion. The wide teeth 40a have a width equivalent to two of the normal teeth 40b, and a relief portion 40c is provided at a lower portion. The wide teeth 40a regulate the position so that the teeth of the drive gear 29 normally mesh when assembling the tray 12 as described later. Next, the configuration of the chassis 13 will be described. As shown in FIG.
Are provided with tray support portions 53 and 54 for supporting the tray 12 on the inner surfaces of the side walls 51 and 52 on both sides. The support portions 53 and 54 are provided at a plurality of positions (three positions in the present embodiment) so as to abut the sliding portions 46 and 47 formed on the lower surface of the tray 12 to slidably support the tray 12. Have been. Further, concave portions 51a and 52a are provided at intermediate positions of the side walls 51 and 52 in the A and B directions.

A pair of guide holes 55 for guiding the first slider 27 slidably in the C and D directions are provided at the edge of the opening 48 formed at the bottom of the chassis 13. Furthermore, a stepped concave portion 6 corresponding to the shape of the insulator rubber 15 described above is provided on the front side of the bottom of the chassis 13.
0 is provided.

Next, the configuration of the floating chassis 14 will be described. As shown in FIGS. 1 and 2, the floating chassis 14 is supported in a floating state by a plurality of insulator rubbers 15 with respect to the chassis 13. Therefore, the vibration input to the chassis 13 is absorbed and insulated by the plurality of insulator rubbers 15.

The floating chassis 14 includes
An opening 61 for moving the movable base 16 up and down is provided. At the side of the opening 61 in the direction B, a mounting portion 62 to which the leaf spring 22 that supports the movable base 16 so as to be able to move up and down is fixed.
Are formed. And the floating chassis 1
Holes 63 and 64 through which tray support portions 53 and 54 provided on the chassis 13 are loosely inserted are provided in the bottom surface and the corners of both side surfaces of 4.

Accordingly, the tray supporting portions 53 and 54 are incorporated in a state of non-contact with the floating chassis 14. Therefore, the floating chassis 14 is mounted so that the vibration input to the chassis 13 is not transmitted through the tray support portions 53 and 54. further,
A drive gear 29 is provided on the bottom surface of the floating chassis 14.
, A pin 73 from the first slider 27 and a leaf spring 87 provided in the second slider 28.
Is provided with a rectangular opening 66 through which is inserted.

At the upper ends of both side surfaces of the floating chassis 14, flat mounting portions 67, 68 to which both ends of the clamper holder 17 are fixed are provided. The mounting portions 67 and 68 are formed so as to protrude outward from both side surfaces of the floating chassis 14. further,
The recesses 51 a, 52 are provided on the side walls 51, 52 of the chassis 13.
a, the floating chassis 14
When the is mounted on the chassis 13, the mounting portions 67, 68
Are inserted into the recesses 51a and 52a of the side walls 51 and 52, and the floating chassis 14 is attached to the chassis 13 in a non-contact state.

Next, the movable base drive mechanism 26 will be described. FIG. 5 is a diagram showing a configuration of the drive gear 29.
(A) is a plan view, (B) is a longitudinal sectional view along the line BB,
(C) is a longitudinal sectional view along the line CC. FIG. 5 (A)
As shown in (B), the driving gear 29 includes a large-diameter gear 29a that meshes with a reduction gear driven by the driving motor 106.
A small-diameter gear 29b for driving the movable base integrally formed on the upper surface of the large-diameter gear 29a; and a tray driving gear 29c fitted to the upper end of the small-diameter gear 29b. Since the tray driving gear 29c has the gear-shaped recess 29d, it can rotate integrally with the large-diameter gear 29a and the small-diameter gear 29b.

In the drive gear 29, the small-diameter gear 29b for driving the movable base is smaller in diameter than the conventional one, and the tray driving gear 29c is larger in diameter than the conventional one. Therefore, the driving gear 29 is a small-diameter gear 29 for driving the movable base.
Since the gear ratio between b and the tray driving gear 29c is not the same but is set to 1: 2, the torque when the movable base 16 is raised can be increased, and
The operation of the tray 12 becomes smooth, and the operation sound can be reduced.

Therefore, when raising the movable base 16 on which the disk motor 20 and the pickup 21 are driven to rotate the turntable 19 having a relatively heavy weight, the torque does not become insufficient, and when the disk is replaced, the tray 12 is not moved. Can be moved to the disk exchange position in a short time, and noise when driving the tray 12 can be reduced.

The tray drive gear 29c has a cylindrical portion 29e fitted on the inner periphery of the small-diameter gear 29b, and an escape portion 29f in which every other tooth at the upper end of the outer periphery is deleted. Therefore, the upper end of the tray driving gear 29c is provided at the escape portion 29f.
And the teeth 29g are formed alternately. This escape part 29
“f” positions the meshing of the teeth 29g by fitting the wide teeth 40a provided at the introduction portion of the rack 40 of the tray 12 described above.

The cylindrical portion 2 of the tray driving gear 29c
The inner circumference 29h of 9e has the same diameter as the inner circumference 29i of the large-diameter gear 29a, and the shaft 13a rising from the chassis 13 is inserted and rotatably supported.

FIGS. 6A and 6B are enlarged views showing how the tray 12 is inserted. FIG. 6A is a plan view, and FIG. 6B is a longitudinal sectional view as viewed from the front. As shown in FIGS. 6A and 6B, when the tray 12 is inserted from the front side, the introduction portion of the rack 40 provided on the left inner wall of the tray 12 is driven by the drive gear 2.
9 is opposed to the tray drive gear 29c. The escape portion 40c of the rack 40 is located at a position corresponding to the escape portion 29f provided on the tray driving gear 29c of the drive gear 29.

FIGS. 7A and 7B are enlarged views showing how the rack 40 of the tray 12 meshes with the tray driving gear 29c of the drive gear 29. FIG. It is a top view showing the state after position adjustment. As shown in FIG. 7A, when the tray 12 is inserted from the front side, the wide teeth 40 a of the rack 40 provided on the inner wall on the left side of the tray 12 are provided on the tray driving gear 29 c of the driving gear 29. So that it fits into the part 29f
The drive gear 29 is rotated clockwise. Then, when the drive gear 29 is rotated to a position where the wide teeth 40a fit into the escape portions 29f, the wide teeth 40a fit into the escape portions 29f.

Further, as the tray 12 moves in the insertion direction, the drive gear 29 is rotated clockwise while the wide teeth 40a are fitted in the escape portions 29f. As a result, the rack 40 has the teeth 4 as shown in FIG.
0b can be meshed with the teeth 29g of the tray driving gear 29c.

As described above, the wide teeth 40a of the rack 40 are fitted into the clearances 29f formed on the tray driving gear 29c of the driving gear 29, so that the teeth 40 of the rack 40 are formed.
The meshing position between b and the teeth 29g of the tray driving gear 29c can be adjusted. Thus, the meshing position of the rack 40 of the tray 12 meshing with the tray driving gear 29c and the meshing position of the large-diameter gear 29a and the rack 71 of the first slide member 27 match.

Therefore, when assembling the tray 12,
The meshing position of the rack 40 of the tray 12 meshing with the tray driving gear 29c and the meshing position of the large-diameter gear 29a and the rack 71 of the first slide member 27 do not shift and the stroke of the tray 12 does not shift. Therefore, the rack 40
And the tray driving gear 29c is no longer meshed with each other, so that the troublesome work of reassembling the tray 12 is not required, and the assembling work efficiency can be improved. FIGS. 8A to 8F are views for explaining the configuration of the first slider 27 of the movable base drive mechanism, where FIG. 8A is a plan view, FIG. 8B is a front view, and FIG. , (D) is a left side view, (E) is an EE cross-sectional view, (F)
Is a sectional view taken along line FF. As shown in FIGS. 8A to 8F, the first slider (first movable base driving member) 27
Is a rack 7 formed at the rear edge and meshing with the gear 29a.
1, a spring portion 72 that abuts against the step of the chassis 13 and urges in the C direction, a cylindrical engaging pin 73 that projects upward and engages the second slider 28, And guide portions 74 and 75 that are slidably engaged with a pair of guide holes 55 provided at the guide portions and guided at sliding positions. The first slider 27 is used as a fixed part of the chassis 1.
3 is slidably provided. The spring portion 72 is an elastic body formed in an inverted U-shape, and is elastically deformed when the tray 12 is displaced to the disk exchange position, so that the first slider 2
7 is urged in the C direction.

On the upper surface of the first slider 27, first and second projections 76 and 77 for restricting the operation of the second slider 28 protrude as described later. Note that the second protrusion 77 is formed higher than the first protrusion 76. Further, since the guide portions 74 and 75 projecting from the lower surface of the first slider 27 are formed in an inverted T-shape, the guide portions 74 and 75 are engaged with the pair of guide holes 55 and guided in the sliding direction, and upward. Is prevented from coming off.

FIGS. 9A to 9C are views for explaining the structure of the second slider 28 of the movable base driving mechanism.
(A) is a plan view, (B) is a front view, and (C) is a side view. As shown in FIGS. 9A to 9C, the second slider (the second movable base driving member) 28 is L when viewed from the side.
A flat portion 81 is formed in a letter shape and slides on the floating chassis 14, and a cam portion 82 hangs downward from an edge of the flat portion 81. The flat portion 81 includes a pin 83 projecting upward, a pair of long holes 84 and 85 extending in the sliding direction (C and D directions), and an engaging pin 73 rising from the first slider 27. A square hole 86 inserted into the fitted state, and first and second projections 76 and 7 of the first slider 27;
A leaf spring (restriction means) 87 that is restricted from moving in contact with the plate 7
And a guide portion 88 which is engaged with the edge of the opening 61 of the floating chassis 14 and projects so as to guide the sliding direction.

Since the second slider 28 is slidably supported by the floating chassis 14 supported in a floating state by the insulator rubber 15, the vibration from the first slider 27 provided on the chassis 13 is prevented from being transmitted. The engaging pin 73 of the first slider 27 is loosely inserted into the hole 86.

The flat portion 81 has a sliding direction (C, D).
A cross-shaped hole 81a extending through the hole 81a extends through the hole 81a, and a leaf spring 87 is inserted into the hole 81a. One end 87a of the leaf spring 87 is fixed to the flat portion 81 by a fixing method such as heat caulking, and the other end 87b extending in the D direction is a free end. Then, the other end 87b of the leaf spring 87
The first and second protrusions 7 of the first slider 27 are
6 and 77 are provided with a contact portion 87c. Further, on both sides of the other end 87b of the leaf spring 87, contact portions 87c are provided.
A sliding contact portion 87d that comes into sliding contact with a trapezoidal cam 14a protruding from the upper surface of the floating chassis 14 when separating from the first and second projections 76 and 77 is projected.

The cam portion 82 has an inclined groove 8 through which a pair of pins 23 projecting from the front end of the movable base 16 are inserted.
9, 90 are penetrating. Therefore, the second slider 28
Slides in the direction C, a pair of pins 2
3 relatively moves upward along the inclined grooves 89 and 90. Therefore, the turntable 19 and the pickup 21 supported by the movable base 16 pass through the opening 61 of the floating chassis 14 and are displaced upward.

Thus, the disk placed on the tray 12 is lifted by the turntable 19 and clamped between the clamper 18. At the same time, the pickup 21 can read information recorded on the disk facing the lower surface of the clamped disk.

The projections 91 and 92 provided on the floating chassis 14 are fitted into the elongated holes 84 and 85. Therefore, the second slider 28 is regulated so that the sliding direction becomes the C and D directions by fitting the long holes 84 and 85 and the projections 91 and 92.

Here, the operation of the movable base drive mechanism 26 configured as described above will be described together with the operation of the tray 12.

FIG. 10 is a side view showing a state where the tray 12 has been moved to the disk exchange position. As shown in FIG. 10, when the tray 12 is pulled out in the direction A and moved to the disk replacement position, the front end of the movable base 16 is lowered. Therefore, the movable base 16 is in a state in which the leaf spring 22 as a pivot point is bent and inclined. Therefore, the turntable 19 and the pickup 21 descend with the rotation of the movable base 16.

FIG. 11 shows the tray 12 by the eject operation.
FIGS. 7A and 7B are diagrams showing an operation state of the movable base drive mechanism 26 when the movement of the movable base drive mechanism 26 to the eject position where the disk can be replaced is completed, wherein FIG. FIG.
(A) and (B), the second slider 28 is slidably mounted on the upper surface of the floating chassis 14, and the first slider 27 is slidably opposed to the lower surface of the floating chassis 14. ing. On the upper surface of the floating chassis 14, a trapezoidal cam 14a that comes into contact with the leaf spring 87 protrudes.

The cam 14a is provided at a position where a contact portion 87d protruding to the side of the leaf spring 87 comes into sliding contact.
Then, the leaf spring 87 is displaced to the unlocked position by the sliding position of the first slider 27 and the sliding contact portion 87d passing through the inclined portion of the cam 14a. In the disk mounting operation, the engaging pin 73 of the first slider 27 moves in the direction D with respect to the hole 86 and does not press the second slider 28 in the direction C. No need to regulate.

Here, the operation of the first slider 27 and the second slider 28 of the movable base driving mechanism 26 will be described.

FIG. 12 is a diagram showing the state of the first slider 27 and the second slider 28 during the disk mounting operation.
(A) is a plan view and (B) is a front view. FIG. 12 (A)
As shown in (B), the first slider 27
Since the gear 29a has the rack 71 that meshes with the gear 9a, the gear 29a is slid in the direction D when the gear 29a is rotationally driven by the drive motor 106 by a disk mounting operation. The engagement pin 73 is in the hole 86
Then, the second slider 28 slides in the D direction. The sliding contact portion 87d of the leaf spring 87 rides on the upper surface of the cam 14a and moves upward while the second slider 28 slides in the D direction. As a result, the contact portion 87c provided at the tip of the leaf spring 87 is
The relative restriction between the first slider 27 and the second slider 28 is released by separating from the second protrusions 76 and 77.

FIGS. 13A and 13B are views showing the states of the first slider 27 and the second slider 28 when the disk storage is completed, wherein FIG. 13A is a plan view and FIG. 13B is a front view. FIG.
(A) and (B), when the second slider 28 slides further in the D direction, the sliding contact portion 87d of the leaf spring 87 separates from the trapezoidal cam 14a and the movable base 16
Of the pair of pins 23 are inclined portions 89b of the inclined grooves 89, 90,
90b, the upper horizontal portion 89 of the inclined grooves 89, 90
a, 90a, the front end of the movable base 16 rises. Thus, the turntable 19 mounted on the movable base 16 clamps the disk placed on the tray 12, and the pickup 21 faces the recording surface of the disk. At this time, the pins 73 move C and D
It can move freely in any direction.

FIG. 14 is a view showing the state of the first slider 27 and the second slider 28 during the ejecting operation.
(A) is a plan view and (B) is a front view. FIG. 14 (A)
As shown in (B), the pair of pins 23 of the movable base 16 are moved by the ejection operation to the inclined portions 8 of the inclined grooves 89 and 90.
When the movable base 16 passes through 9b and 90b and is located at the lower horizontal portion 89c and 90c, the front end of the movable base 16 descends. As a result, the turntable 19 mounted on the movable base 16
And the pickup 21 moves below the tray 12.

In the movable base 16, the pair of pins 23 are moved from the position P1 of the upper horizontal parts 89a, 90a to the inclined parts 89b, 9a.
0b, the engaging pin 73 of the first slider 27 is loosely fitted in the hole 86 so that the vibration from the first slider 27 is not transmitted to the second slider 28.
The pin 23 moves in the direction C with respect to the hole 86 and the pin 23 is
b, 90b in the direction D, the second slider 28 is slid, and the pin 23 is suddenly moved to the lower horizontal portion 89.
There is a possibility that it will drop to the P3 position of c and 90c.

However, the second slider 28 is
As shown in FIG. 14 (B), the contact portion 87c provided at the tip of the leaf spring 87
The first slider 27 that is driven by the drive gear 29 is restricted from moving in the direction D by contacting the second protrusions 76 and 77.
And move together. Therefore, at the start of the ejection, the engaging pins 73 of the first slider 27 move in the C direction with respect to the holes 86, and the pins 23 of the movable base 16 move from the P1 position to the P2 position, causing the inclined portions 89b and 90b to move. D
Even if pressed in the direction, the second slider 28 cannot move in the D direction without permission, so that the pin 23 cannot drop rapidly, and the front end of the movable base 16 drops at a speed corresponding to the driving position of the first slider 27.

As described above, when the eject operation is performed, the tray 1
When the front end of the movable base 16 is lowered before moving the movable base 2, the pins 23 of the movable base 16
Since the front end of the movable base 16 does not drop suddenly in the process of moving to the second position, the hole 86 of the second slider 28 does not collide with the engaging pin 73, and an impact and an impact sound are generated when the movable base 16 is lowered. Can be prevented. Further, the impact due to the lowering of the movable base 16 is reduced, and the disc is prevented from being shifted from the mounting position of the tray 12 due to the impact.

FIG. 15 is a plan view showing the operating state of the movable base drive mechanism 26 when the tray 12 has moved to the disk replacement position. As shown in FIG.
When the disc 2 is moved to the disc replacement position, the rack 40 of the tray 12 is engaged with the tray driving gear 29c of the driving gear 29 driven by the driving motor 106.
Therefore, the tray 12 can move at a high speed by the tray driving gear 29c having a larger diameter than the small diameter gear 29b. Also, the second slider 28 is configured such that the pin 83
2 is fitted in the guide groove 44 formed on the lower surface side and passes through the inclined portion 44d, so that it is locked at the position moved in the D direction.

The pin 73 of the first slider 27 is
Since it is engaged with the hole 86 of the second slider 28, it has moved in the D direction together with the second slider 28. Therefore, the rack 71 of the first slider 27 is at the drive release position separated from the small-diameter gear 29b of the drive gear 29. Also, the first
The pressing portion 72 provided on the right end side of the slider 27 is in contact with the inner wall of the concave portion 98a of the chassis 13 and is elastically deformed.

The second slider 28 is formed on the inclined groove 8 through which a pair of pins 23 projecting from the front end of the movable base 16 are inserted.
Since the second slider 28 slides in the direction D, the pair of pins 23 of the movable base 16 relatively moves down along the inclined grooves 89 and 90 because the second slider 28 slides in the direction D. Therefore, the movable base 16 is displaced to the inclined state shown in FIG.

Further, an abutting portion 87c provided at the tip of a leaf spring 87 provided on the second slider 28 abuts on the first and second protrusions 76 and 77 of the first slider 27 in the direction D. Movement is regulated. Therefore, the second slider 28 moves integrally with the first slider 27 driven by the tray driving gear 29c of the driving gear 29. Therefore, at the time of the ejecting operation, the inclined portion 89 is moved while the pin 23 of the movable base 16 moves from the P1 position to the P2 position.
b, 90b in the D direction, the second slider 28
The pin 23 does not move in the direction and is prevented from dropping sharply. Therefore, the front end of the movable base 16 descends at a speed corresponding to the driving position of the first slider 27 so as not to generate an impact and an impact sound. The above-described impact prevention operation temporarily restricts the movement of the first slider 27 in the D direction only when the movable base 16 starts to descend by the eject operation.

FIG. 16 shows the movable base drive mechanism 26 when the tray 12 starts to move in the direction B from the disk exchange position.
FIG. 4 is a plan view showing the operation state of FIG. After the disk is loaded on the disk loading section 30 of the tray 12, the tray 12 is pressed in the B direction. When the tray 12 starts to move in the direction B from the disk exchange position in this manner, FIG.
As shown in FIG. 7, the gear 29c of the base driving mechanism 26 rotates clockwise to move the rack 40 in the direction B, and the inclined portion 44d of the guide groove 44 provided on the lower surface of the tray 12 The second slider 28 is moved in the C direction by pressing the pins 83 of the C direction. At this time, the leaf spring 87 provided on the second slider 28 has the engaging portion 8d since the sliding contact portion 87d rides on the cam 14a.
7d is pressed upward and the contact portion 87c is
7 are separated from the first and second projections 76 and 77.

The pressing portion 72 provided on the right end side of the first slider 27 is curved in an inverted U-shape.
, The first slider 27 is urged in the direction C by the reaction. Therefore, the first
The slider 27 and the second slider 28 start to move smoothly in the C direction along the inclined portion 44d of the guide groove 44.

FIG. 17 is a plan view showing the operation state of the movable base drive mechanism 26 when the tray 12 moves in the direction B.

As shown in FIG. 17, when the tray 12 is moved in the direction B by the rotational driving force of the drive motor 106 and reaches the position immediately before the disk storage position, the rack 40 of the tray 12 drives the drive gear 29 to drive the tray. Away from the gear 29c. At the same time, the pins 73 of the first slider 27 and the pins 83 of the second slider 28 are connected to the inclined portions 42c and the guide grooves 44 of the guide grooves 42 provided on the lower surface of the tray 12.
Along the inclined portion 44d in the C direction.

Therefore, the rack 71 of the first slider 27
Moves to a position where it meshes with the small-diameter gear 29b of the drive gear 29. Since the first slider 27 is driven by the small diameter gear 29b having a larger reduction ratio than the tray driving gear 29c, the first slider 27 is driven with a larger driving torque. This allows
The pins 73 of the first slider 27 and the pins 83 of the second slider 28 are connected to the guide grooves 42 provided on the lower surface of the tray 12.
The tray 12 is moved in the direction B by pressing the inclined portion 42c of the guide groove 44 and the inclined portion 44d of the guide groove 44 in the direction C, and is moved to the disk accommodation position.

FIG. 18 is a plan view showing the operation state of the movable base drive mechanism 26 when the tray 12 has moved to the disk accommodation position.

As shown in FIG. 18, when the tray 71 of the first slider 27 is driven by the driving motor 106 in the direction C by the rotational driving force and reaches the leftmost position,
The second slider 28 is also driven by the pin 73 and moves to the leftmost position. Therefore, the inclined grooves 89 of the second slider 28,
As the 90 moves in the C direction, the pair of pins 23 projecting from the front end of the movable base 16 move upward.

Therefore, the turntable 19 supported by the movable base 16 lifts the disk placed on the tray 12, and the tapered portion protruding above the turntable 19 centers the disk, and places the disk on the clamper 18. Press. At the same time, the pickup 21 faces the lower surface of the disk and is ready to read information recorded on the disk.

In this state, the pin 73 of the first slider 27 contacts the wall 42a of the guide groove 42 of the tray 12 to prevent the tray 12 from moving in the direction A. The pin 83 of the second slider 28 is connected to the wall 44 of the guide groove 44.
a, 44b.

FIG. 19 is a plan view showing the operating state of the movable base driving mechanism 26 in the disk reproducing state.

As shown in FIG. 19, the drive motor 10
6 is driven to rotate in a direction opposite to the above for a predetermined time. Thereby, the first slider 27 having the rack 71 meshing with the gear 29a moves in the D direction. Therefore, the pin 73 projecting upward from the first slider 27 is
It reaches a substantially intermediate position of the hole 86 and is fitted in a loosely fitted state.

As described above, the pins 73 of the first slider 27
Is not in contact with the hole 86 of the second slider 28, so that the vibration input to the chassis 13 is prevented from propagating to the second slider 28 via the first slider 27.

FIG. 20 is a side view showing a state where the movable base 16 has moved upward to the disk clamp position. FIG. 21 is a front view showing a state where the movable base 16 has moved upward to the disk clamp position.

As described above, the movable base 16 is changed from the inclined state shown in FIG. 10 to the movable state shown in FIGS.
As shown in FIG.
The disk is clamped between the disk and the clamper 18. Thus, the pickup 21 can read information recorded on the disc mounted in the apparatus.

As described above, when the tray 12 is moved to the disk accommodation position, the drive gear 29, the tray 12, and the first slider 27 provided on the fixed chassis 13 are
The second slider 28 provided on the floating chassis 14 and the movable base 16 are separated from each other in a non-contact state.
Further, since the floating chassis 14 is supported by the chassis 13 in a floating state via the insulator rubber 15, even if external vibration is input to the chassis 13 or the tray 12, the floating vibration is propagated to the movable base 16 by the insulator rubber 15. Is prevented. Therefore, occurrence of off-track of the pickup 21 due to vibration propagation can be prevented.

Further, even when the tray 12 comes into contact with the tray 12, the impact does not propagate to the movable base 16.
It is not necessary to provide an opening / closing lid at the opening 25 of the fifth, so that the number of parts can be reduced and the assembly process can be simplified. When the movable base 16 moves upward in the horizontal state, the rubber member 105 attached on the movable base 16 is pressed against the lower surface of the floating chassis 14 and elastically deforms. Therefore, the movable base 16 is urged downward by the elastic restoring force of the rubber member 105, and the pair of pins 23 are pressed by the inclined grooves 89 and 90 of the second slider 28 and are supported without rattling. Is done.

FIG. 22 is a time chart of each operation part corresponding to the above-mentioned operation states. FIG. 22A shows the operation state of the drive motor 106. FIG. 22B shows the operation state of the tray 12. FIG. 22C shows an operation state of the first slider 27. FIG. 22D shows the operation state of the second slider 28. FIG. 22E shows the movable base 16.
3 shows the operation state. In the above embodiment, the CD-ROM
Although the apparatus has been described as an example, the CD-RO is not limited to this.
Needless to say, the present invention can be applied to a disk device on which a recording medium other than M is mounted.

As described above, according to the first aspect of the present invention, it is possible to prevent the movable base from descending prior to the operation of the movable base driving member when the tray descends from the disk storage position to the disk exchange position. Because of the restriction, the movable base can be prevented from dropping under its own weight. Therefore, it is possible to prevent an impact and an impact sound from being generated by the dropping operation of the movable base, and it is possible to enhance the reliability of the device. In addition, the impact due to the lowering of the movable base is reduced, and the disc can be prevented from being shifted from the tray mounting position due to the impact.

According to the second aspect of the present invention, the second movable base driving member moves prior to the operation of the first movable base driving member in the process of lowering the tray from the disk storage position to the disk replacement position. Therefore, it is possible to prevent the movable base from pressing the second movable base driving member and dropping by its own weight. Therefore, it is possible to prevent an impact and an impact sound from being generated by the dropping operation of the movable base, and it is possible to enhance the reliability of the device.

According to the third aspect of the present invention, the regulating means is provided between the first movable base driving member and the second movable base driving member, and the second movable base driving member is operated by the operation of the first movable base driving member. Since the member is regulated to operate, the movable base can be prevented from moving the second movable base driving member, and the movable base can be prevented from dropping under its own weight. Therefore, it is possible to prevent an impact and an impact sound from being generated by the dropping operation of the movable base, and it is possible to enhance the reliability of the device.

According to the fourth aspect of the present invention, the first movable base driving member is movably provided on the fixed portion, and the second movable base driving member is moved to the chassis supported in a floating state with respect to the fixed portion. Since the movable base is provided so as to prevent the movable base supported in a floating state from moving the second movable base driving member, the movable base can be prevented from dropping by its own weight. Therefore, it is possible to prevent an impact and an impact sound from being generated by the dropping operation of the movable base, and it is possible to enhance the reliability of the device.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of a disk drive according to the present invention.

FIG. 2 is a plan view showing a state where a tray is removed while leaving a guide groove of the tray.

FIG. 3 is a front view showing a structure near a movable base driving mechanism.

4A and 4B are diagrams showing the configuration of the tray 12, wherein FIG. 4A is a bottom view of the tray 12 as viewed from below, FIG. 4B is a side view showing an enlarged rack introduction portion of the tray 12, and FIG. 1
It is a bottom view which expands and shows the rack introduction part of No. 2.

5A and 5B are diagrams showing a configuration of a driving gear 29, wherein FIG. 5A is a plan view, FIG. 5B is a longitudinal sectional view along line BB, and FIG.
It is a longitudinal cross-sectional view which follows the C line.

FIGS. 6A and 6B are enlarged views showing how the tray 12 is inserted, wherein FIG. 6A is a plan view and FIG. 6B is a longitudinal sectional view as viewed from the front.

7A and 7B are enlarged views showing how the rack 40 of the tray 12 meshes with the tray driving gear 29c of the drive gear 29, wherein FIG. 7A is a plan view showing a meshing start state, and FIG.
FIG. 4 is a plan view showing a state after the engagement position is adjusted.

8A and 8B are diagrams for explaining the configuration of a first slider 27 of the movable base driving mechanism, where FIG. 8A is a plan view, FIG. 8B is a front view, FIG. 8C is a bottom view, and FIG. (E) is an EE cross-sectional view, and (F) is an FF cross-sectional view.

9A and 9B are diagrams for explaining the configuration of a second slider 28 of the movable base driving mechanism, wherein FIG. 9A is a plan view, FIG. 9B is a front view, and FIG. 9C is a side view.

FIG. 10 is a side view showing a state where the tray has been moved to a disk replacement position.

11A is a diagram illustrating an operation state of the movable base drive mechanism 26 when the tray 12 has been moved to an eject position where a disc can be replaced by an eject operation, and FIG.
Is a plan view, and (B) is a front view.

12A and 12B are diagrams showing states of a first slider 27 and a second slider 28 during a disk mounting operation process, wherein FIG. 12A is a plan view and FIG. 12B is a front view.

FIG. 13 shows the first slider 27 when the disk storage is completed.
FIGS. 3A and 3B are diagrams showing a state of the second slider and FIG. 3A is a plan view, and FIG.

14A and 14B are diagrams showing states of a first slider 27 and a second slider 28 during an ejection operation, wherein FIG. 14A is a plan view and FIG. 14B is a front view.

FIG. 15 is a plan view showing an operation state of the movable base drive mechanism when the tray has moved to the disk exchange position.

FIG. 16 is a plan view showing an operation state of the movable base driving mechanism when the tray starts to move in the direction B from the disk exchange position.

FIG. 17 is a plan view illustrating an operation state of the movable base driving mechanism when the tray moves in the B direction.

FIG. 18 is a plan view showing an operation state of the movable base drive mechanism when the tray has moved to the disk accommodation position.

FIG. 19 is a plan view showing an operation state of the movable base drive mechanism when the tray has moved to the disk accommodation position.

FIG. 20 is a side view showing a state where the movable base has moved up to the disk clamp position.

FIG. 21 is a front view showing a state where the movable base has moved up to the disk clamp position.

FIG. 22 is a time chart of each operation portion corresponding to the operation state to FIG.

[Explanation of symbols]

 Reference Signs List 11 disk device 12 tray 13 chassis 14 floating chassis 14a cam 15 insulator rubber 16 movable base 17 clamper holder 18 clamper 19 turntable 20 disk motor 21 pickup 23 pin 24 front bezel 26 movable base drive mechanism 27 first slider 28 second slider 29 Drive gear 29a Large-diameter gear 29b Small-diameter gear 29c Tray driving gear 29f Relief section 30 Disk mounting section 40 Rack 40a Wide teeth 40b Teeth 40c Relief section 42 First guide groove 44 Second guide groove 53, 54 Tray support section 58 Discharge Switch 59 Clamp switch 71 Rack 73 Engagement pin 76 First projection 77 Second projection 81 Flat part 82 Cam part 83 Pin 86 Hole 87 Leaf spring 87c Contact part 87d Sliding part 89, 90 Inclined groove 93 Arm body 94 Rotating shaft 95 Press pin 96 Pin 101 Disk 102 Spring 106 Drive motor

Claims (4)

[Claims] 1. A tray on which a disk-shaped recording medium is mounted and movably provided between a disk exchange position and a disk storage position, and a turn supporting the disk after the tray is moved to the disk storage position. A table, a pickup for recording or reproducing information recorded on a recording surface of the disc-shaped recording medium, a movable base for supporting the turntable and the pickup, and a clamper for clamping the disc between the turntable And a movable base driving member driven by a motor to move the movable base so as to sandwich the disk between the turntable and the clamper when the tray moves to the disk storage position. In the apparatus, the tray is lowered from the disk storage position to the disk replacement position. A disk device, further comprising a restricting means for restricting the movable base from descending prior to the operation of the movable base driving member in a lowering step. 2. A tray on which a disk-shaped recording medium is placed and movably provided between a disk exchange position and a disk storage position, and a turn supporting the disk after the tray is moved to the disk storage position. A table, a pickup for recording or reproducing information recorded on a recording surface of the disc-shaped recording medium, a movable base for supporting the turntable and the pickup, and a clamper for clamping the disc between the turntable A first movable base driving member that is driven by a motor to slide when the tray is moved to the disk accommodating position; The movable base is moved to the disk accommodation position so that the disk is held between the clamper and the clamper. A second movable base driving member, wherein the tray moves down from the disk storage position to the disk exchange position so that the second movable base driving member is operated by the first movable base driving member. A disk device comprising a regulating means for regulating a preceding movement. 3. The regulating means is provided between the first movable base driving member and the second movable base driving member,
3. The disk drive according to claim 2, wherein the operation of the first movable base driving member regulates the operation of the second movable base driving member. 4. The method according to claim 1, wherein the first movable base driving member is movably provided on a fixed portion, and the second movable base driving member is movably provided on a chassis supported in a floating state with respect to the fixed portion. 3. The disk device according to claim 2, wherein: