JP2000163842A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely drive both large-diameter and small diameter disks by disposing a turntable for the large-diameter disk and a turntable for the small- diameter disk not on a plane but in a height direction, and clamping the large- diameter disk by the turntable for the small-diameter disk so as to effectively dispose each member in a limited casing. SOLUTION: A large-diameter disk D1 is held between first and second turntable 8 and 14 and clamped, and the large-diameter disk D1 is rotary-driven by a motor 12 for driving the second turntable 14. When a supporting section 11 is lowered and then moved in a side direction, a small-diameter disk D2 is clamped and rotary-driven by the second turntable 14. Thus, both disks D1 and D2 are housed beforehand, and one of these is optionally selected to be driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive capable of driving both large-diameter disks such as CDs (compact disks) and DVDs (digital versatile disks) and small-diameter disks such as MDs (mini disks).

[0002]

2. Description of the Related Art Some disk devices used as audio equipment and various information processing equipment are capable of loading both relatively large-diameter disks such as CDs and DVDs and relatively small-diameter disks such as MDs. .

[0003] Particularly, in a disk drive for a vehicle, 1DIN
It is desired that both the large-diameter disk and the small-diameter disk can be loaded in a standardized in-dash type housing called a size. As means for realizing this, each of a rotary table for a large-diameter disk and a rotary table for a small-diameter disk is mounted on a common base, and each disk is reproduced by a common head mounted on the base. And / or a structure for recording.

[0004]

As described above, in order to mount a rotary table for a large-diameter disk and a rotary table for a small-diameter disk on a common base, and to perform reproduction and the like on both disks with a common head, It is necessary to arrange the head between two rotating tables.

However, when a head is provided between the rotary tables on the base, it is necessary to scan the head along the entire radial area of the recording surface of the large-diameter disk. It is necessary to arrange the rotary table for the small-diameter disk and the rotary table for the small-diameter disk at least a distance larger than the radius of the large-diameter disk.

On the other hand, it is difficult to arrange a large-diameter disc such as a CD or DVD and a small-diameter disc such as an MD in a position where they do not overlap in a plane with a limited volume such as a 1DIN size. In addition, the installation area of the large-diameter disk and the installation area of the small-diameter disk must be arranged at a position where they overlap in a plane.

Therefore, when the large-diameter disk is mounted on one of the rotary tables mounted on the common base, and when the small-diameter disk is mounted on the other rotary table, the base is moved in a complicated stroke. And the structure becomes very complicated, and there is no design margin when arranging each member in a limited space.

Alternatively, when both disks are driven by two rotary tables on a common base, a small-diameter disk must be ejected when a large-diameter disk is loaded, and a small-diameter disk is loaded. When you do, you have to eject the large disc. As a result, there arises an inconvenience that an operation of loading a large-diameter disk and a small-diameter disk together and arbitrarily selecting a disk to perform reproduction or the like cannot be performed.

The present invention has been made to solve the above-mentioned conventional problems, and a rotary table for a large-diameter disk and a rotary table for a small-diameter disk are arranged not in a plane but in a height direction. Provided is a disk device in which clamping is performed on a rotary table for a small-diameter disk so that each member can be effectively arranged in a limited housing and both large-diameter disks and small-diameter disks can be reliably driven. It is intended to be.

Another object of the present invention is to provide a disk drive in which both a large-diameter disk and a small-diameter disk are loaded in a housing, and both disks can be arbitrarily selected and driven. It is a further object of the present invention to provide a disk drive capable of rotating a large-diameter disk and a small-diameter disk with a common motor.

[0011]

According to the present invention, there is provided a disk apparatus having a projection into which a center hole of a large-diameter disk is fitted, a recess formed at the top of the projection, and a receiving portion for receiving a disk surface. A rotary table, a first support portion for supporting the first rotary table from a side opposite to the protrusion, a small protrusion into which a center hole of a small-diameter disk is fitted, and the large-diameter disk. A second rotary table having a pressing portion that presses against a receiving portion of the first rotary table; a second support portion that supports the second rotary table from a side opposite to the small protrusion; A motor that rotationally drives the rotary table, wherein the first support portion and the second support portion face a non-clamping position where the protrusion and the small protrusion coaxially face each other, and The small protrusion of the first turntable fits into the recess of the first turntable. The support portion can be moved closer to a clamp position where the large-diameter disk is pressed against the receiving portion of the first rotary table by the pressing portion. The central portion of the large-diameter disk can be sandwiched between the rotary tables when both support portions are at the clamp position, and the central portion of the small-diameter disk has the second rotational position. It is characterized in that it can be installed at a position to be attached to the small projection of the table.

In the above means, the rotary table for the large-diameter disk and the rotary table for the small-diameter disk are arranged so that their disk receiving portions can face each other in the height direction, and the second rotary table for the small-diameter disk is provided. Accordingly, the large-diameter disk can be clamped to the first rotary table, so that even if the large-diameter disk and the small-diameter disk are arranged to overlap in the plane direction, both disks can be easily driven.

The second support is provided with a head capable of scanning the recording area of the large-diameter disk over the entire area in the radial direction and capable of reproducing a signal from the small-diameter disk. Structure. In this structure, both the motor and the head for driving the second rotary table can be mounted on the second support.

The installation area for the small-diameter disk is provided at a position where the two support portions do not hit either of the two support portions when moving from the non-clamp position to the clamp position. The small-diameter disk in the installation area is transferred to a position where the small-diameter disk in the installation area can be mounted on the second rotary table when in the unclamping position, or the small-diameter disk in the installation area can be mounted on the second rotary table. It is preferable that the second support portion can be transported.

[0015] In the above configuration, both the large-diameter disk and the small-diameter disk can be arbitrarily selected and driven while both the large-diameter disk and the small-diameter disk are installed in the housing in advance. It is not necessary to eject the disc. For example, the pressing portion of the second rotary table is configured by a pressing member that presses the large-diameter disc against the first rotary table via an elastic force.

The pressing portion uses the flange portion formed around the small projection in the second rotary table as it is, and presses the circumference of the center hole of the large-diameter disc against the first rotary table by the flange portion. Is also good. However, if the diameter of the center hole of the large-diameter disc varies, the large-diameter disc may not be able to be reliably pressed against the first rotary table by the flange portion. Therefore, by using the pressing member, a large-diameter disk can be elastically and reliably pressed against the first rotary table.

The pressing member may be a leaf spring fixed to the second rotary table and extending in the radial direction of the second rotary table, or a one-piece resin rotary table. An elastic arm extending in the radial direction may be integrally formed with the portion, and the elastic arm may be the pressing member.

Further, the pressing portion of the second rotary table has a pressing member for pressing the large-diameter disk against the first rotary table by a swinging operation when a base end of the pressing portion hits the first rotary table. May be configured.

In this case, it is preferable that the pressing member presses the large-diameter disk against the first rotary table via an elastic force during the swinging operation. However, the elastic member that swings may have a rigidity that does not elastically deform.

In addition, between the first support portion and the second support portion, when the two support portions move from the non-clamp position to the clamp position, the small projections fit into the recesses. It is preferable that positioning means to be fitted to each other be provided before the positioning.

When the positioning means is provided, the relative position between the first support portion and the second support portion can be reliably determined, and the small protrusion of the second turntable is rotated by the first rotation. It can be securely fitted into the concave portion of the table.

A second motor for rotating the first rotary table is provided. When a large-diameter disk is sandwiched between the first rotary table and the second rotary table, the second motor is rotated. The large diameter disk may be rotationally driven only by the second motor, or the large diameter disk may be rotationally driven by both the second motor and the motor that rotationally drives the second rotary table.

[0023]

FIG. 1, FIG. 2 and FIG. 3 are front views of a disk drive according to the present invention. FIG. 1 shows a standby state in which none of the disks is driven. 2 is in a non-clamping position, FIG. 2 is a state in which a first supporting portion and a second supporting portion are in a clamping position of a large-diameter disk, and FIG. 3 is a state in which a second supporting portion clamps a small-diameter disk. Each state is shown.

The housing 1 shown in FIG. 1 is for use in a vehicle and has a so-called 1DIN size of an in-dash type. Reference numeral A shown in FIG. 1 is an installation area of the large-diameter disk D1, and reference numeral B is an installation area of the small-diameter disk D2. Large diameter disc D1
Is a CD (compact disk), a DVD (digital versatile disk), or the like, and is not usually stored in a hard case or the like, and the disk D1 is loaded as it is. Alternatively, the large-diameter disk D1 may be installed in the installation area A while being housed in a cartridge (hard case). A center hole D1a is opened at the center of the large-diameter disk D1.

The small-diameter disk D2 is stored in a cartridge (hard case) C. In this embodiment, the small-diameter disk D2 is an MD (mini-disk) in which the small-diameter disk D2 is stored in the cartridge C. FIG. 8 shows an enlarged central portion of the MD. A center hole D2a of the small-diameter disk D2 is provided substantially in the center of the bottom surface of the cartridge C.
Is exposed, and an exposure hole C1 is opened. In the case of MD, a clamp hub H formed of a metal plate is attached to the center hole D2a of the small-diameter disk D2. Further, the cartridge C is provided with a window facing the optical head, and a shutter mechanism for opening and closing the window is provided.

As shown in FIG. 1, in the installation area A of the large-diameter disk D1, large-diameter holders 2 and 2 for supporting the large-diameter disk D1 in the lateral direction (X direction) are provided. , 2 are supported by a first support 3. The first support portion 3 is fixedly provided in the housing 1 and has a horizontal ceiling portion 3a in the horizontal direction (X direction), and a vertical direction from both left and right sides of the ceiling portion 3a in the downward direction (Z1 direction). And both side plates 3b, 3b. The large diameter holders 2, 2
Is movable up and down in the height direction (Z direction) inside the side plates 3b, 3b, and is driven up and down by an up / down driving means (not shown). In FIG. 1, the large-diameter holders 2 are
b, 3b, and descends in the Z1 direction.
The large-diameter holders 2 and 2 are located in the installation area A.

In the installation area B of the small-diameter disk D2,
The small diameter holders 4 and 4 are fixed. The large-diameter holders 2 and 2 and the small-diameter holders 4 and 4 are spaced from each other in the height direction (Z direction) in the housing 1, and when viewed from a plane, mutually in the lateral direction (X direction). They are arranged at overlapping positions.

In the front view shown in FIG. 1, a front panel called a nose portion fixed to the housing 1 is fixed to the front side of the drawing. In this front panel, the installation area A and the installation area The insertion openings are respectively opened at positions facing B. Large-diameter disc D inserted from one insertion slot
1 is fed into the large-diameter holders 2 and 2 in the installation area A by a transfer means having a transfer roller. The MD inserted from the other insertion opening is drawn into the small-diameter holders 4 and 4 by a drawing mechanism.

A cylindrical bearing bracket 5 is fixed to the ceiling 3a of the first support 3. Bearings 6 and 6 are held in the bearing bracket 5 at intervals in the axial direction. The bearings 6 and 6 are sliding bearings or ball bearings. A support shaft 7 is rotatably supported by the bearings 6, 6, and a first turntable 8 is provided at a lower end of the support shaft 7.
Is fixed by press fitting or the like. A retaining ring 9 is fitted on the upper end of the support shaft 7.

The first turntable 8 is made of resin. However, since a second turntable 14 described later has a magnet 14c (see FIG. 4), the first turntable 14 has a first turntable.
It is preferable that the turntable 8 has a structure in which a metal plate that can be attracted by the magnet 14c is embedded. Alternatively, the entire first turntable 8 is
It may be formed of a magnetic metal material that can be adsorbed by a magnetic material.

The first turntable 8 has a projection 8a for centering the center hole D1a of the large-diameter disk D1. The protrusion 8a is provided at the center hole D1a of the large-diameter disk D1.
Is formed to have an outer diameter slightly smaller than the diameter of the center hole D1a, and the corner 8a1 is an inclined surface or an R-shaped surface so as to guide the edge of the center hole D1a. A recess 8b is formed at the top of the projection 8a. Further, a flange 8c is formed around the base of the projection 8a on the Z2 side.

In the first rotary table 8, a support shaft 7 is provided on the opposite side of the projection 8a for centering the center hole D1a of the large-diameter disk D1, and the first rotary table 8 rotates in a downward attitude. It is freely supported. Note that the support shaft 7 is fixed to the first support portion 3 and the support shaft 7
The first turntable 8 may be rotatably supported via a bearing.

Below the first support 3 (in the Z1 direction), a second support 11 is provided. This second support 1
1 is above the non-clamp position shown in FIG. 1 (Z2 direction)
To the clamp position of the large-diameter disk D1 shown in FIG. The small-diameter disk D
The second installation area B is arranged at a position where it does not hit the second support portion 11 which rises vertically from the non-clamp position in FIG. 1 to the clamp position in FIG.

Further, the second support portion 11 is movable leftward (X2 direction) from the unclamped position shown in FIG. 1, and moves upward (Z2 direction) from its end position. It can be moved to the clamp position of the small-diameter disk D2 shown in FIG. Alternatively, the second support portion 11
Is movable horizontally in the X2 direction from the position shown in FIG. 1, and when the second support portion 11 moves below the installation area B, the MD is lowered and the small-diameter disk D2 is moved to the second rotary table. 14 clamped. The second support portion 11 is movably guided to each of the positions, and is driven to move to each of the positions by driving means (not shown).

The motor 1 is mounted on the lower surface of the second support 11.
2 is fixed. The rotating shaft 13 of the motor 12 is
A second turntable 14 is fixed to the upper end of the rotating shaft 13 so as to protrude above the support portion 11.

The second turntable 14 has a small projection 14a projecting upward (Z2 direction). The small protrusion 14a can be fitted to a clamp hub H attached to the center hole D2a of the small-diameter disk D2,
Further, it has an outer diameter dimension that can be fitted into the recess 8 b of the first turntable 8. Further, as shown in FIG. 4 and the like, the corner 14a1 around the upper portion of the small projection 14a is
The inner peripheral surface of the second clamp hub H is formed as an inclined surface or an R curved surface capable of centering.

The small projection 1 of the second turntable 14
In a state where the recess 4b and the recess 8b of the first turntable 8 are fitted, the small protrusion 14a and the recess 8b are fitted so as to be able to transmit a rotational force to each other. For example, on both the outer peripheral surface of the small protrusion 14a and the inner peripheral surface of the concave portion 8b, spline uneven portions are formed alternately in the circumferential direction.
And the recess 8b are spline-fitted. Or small protrusion 14
a and a concave portion are formed on one of the outer peripheral surface of the concave portion 8a and the inner peripheral surface of the concave portion 8b.
Are fitted in the rotation direction. Alternatively, the surface of the outer peripheral surface of the small protrusion 14a and the surface of the inner peripheral surface of the recess 8b may be roughened so that the small protrusion 14a and the recess 8b are frictionally engaged.

A flange 14b is formed around the base end of the small projection 14a of the second turntable 14. This flange portion 14b is used for the MD cartridge C
Is formed with an outer diameter dimension that can enter the exposed hole C1 on the lower surface of the.

An optical head 15 is provided on the second support 11.
Is supported. This optical head 15 is a large-diameter disk D
1 and a small-diameter disk D2. The optical head 15 is guided so as to be movable in the lateral direction (X direction), and is driven to reciprocate in the lateral direction by a threat mechanism (not shown). The optical head 15 is provided with an objective lens 15a facing upward (Z2 direction), and incorporates a light emitting element, a light receiving element, and other optical components inside.

The moving stroke of the optical head 15 in the X direction is a range in which the objective lens 15a can scan along the recording surface of the large-diameter disk D1 over the entire length in the disk radial direction.

Between the first support 3 and the second support 11, positioning means 16 are provided at one or a plurality of positions which are fitted to each other at positions outside the large-diameter disk D1. The positioning means 16 is provided between the first support portion 3 and the second support portion 3.
And a positioning hole 16b provided on the other side of the supporting portion 11 of the supporting member 11.

In FIG. 1, the second support portion 11 is at the unclamped position. In this state, the protrusion 8a of the first turntable 8 and the small protrusion 14a of the second turntable 14 face each other. The rotation center of the first turntable 8 and the rotation center of the second turntable 14 are located on the same axis. From this state, while the second support 11 rises in the vertical direction and moves to the clamp position shown in FIG. 2, first, the positioning pins 16a of the positioning means 16 and the positioning holes 16b are fitted. First support part 3
And the second support portion 11 are positioned in a lateral direction (X direction) and a front-rear direction (a direction orthogonal to the paper surface), and thereafter, the small protrusion 14a of the second turntable 14 is moved to the first turntable. 8 can be fitted into the recess 8b.

Next, the operation of the disk drive of the present invention will be described. In the standby state shown in FIG.
1 is lowered in the Z1 direction. At this time, the rotation center of the first turntable 8 and the rotation center of the second turntable 14 are located on the same line extending in the height direction (Z direction). .

In this state, the large-diameter disk D1 inserted from one of the insertion holes formed in the front panel is carried into the large-diameter holders 2 and 2 in the installation area A by the transport means and installed. At this time, the large-diameter disk D1 is inserted with the signal recording surface facing downward (Z1 side). The MD inserted from the other insertion opening is drawn into the small-diameter holders 4 and 4 by the drawing means and installed.

In this disk drive, it is possible to arbitrarily select and drive the large-diameter disk D1 installed in the installation area A and the small-diameter disk D2 installed in the installation area B as described above. FIG. 2 shows a state in which the large-diameter disk D1 is selected and driven, and FIG.
Is selected and driven.

When the large-diameter disk D1 is driven, as shown in FIG. 1, first, the first rotary table 8 and the second rotary table 14 are moved from the non-clamp position where they are coaxially opposed to each other. Large-diameter holder 2 provided on support portion 3
2 rises in the Z2 direction, and the central hole D1a of the large-diameter disk D1 held by the large-diameter holders 2, 2 is fitted into the outer peripheral portion of the projection 8a of the first turntable 8. As shown in FIG. 4, since the corner 8a1 around the tip of the projection 8a is an inclined surface or an R-shaped surface, the center hole D1 of the large-diameter disk D1 is formed.
a is centered and fitted into the projection 8a.

Next, the second support portion 11 is raised vertically in the Z2 direction. At this time, the second support 11 rises without hitting the MD and the small-diameter holder 4 located in the installation area B. During this ascent process, first, the positioning means 1
The positioning pins 16a constituting the second supporting member 6 are fitted into the positioning holes 16b, and the first support portion 3 and the second support portion 11 are positioned in the X direction and the front-back direction. After the positioning pins 16a and the positioning holes 16b are fitted, the small protrusions 14a of the second rotary table 14
In the recess 8b.

At this time, the flange portion 14b of the second rotary table 14 serves as a pressing portion, or a pressing member described later causes the peripheral portion of the center hole D1a of the large-diameter disk D1 to be pressed by the flange portion of the first rotary table 8. 8c. Therefore, the large-diameter disk D <b> 1 is clamped by the second turntable 14 with respect to the first turntable 8. This state is the clamp position shown in FIG.

At the same time as the large-diameter disk D1 is clamped, the upper surface of the projecting piece having the positioning hole 16b of the second support portion 11 abuts against the large-diameter portion at the base end of the positioning pin 16a. The second support portion 11 is further restricted from moving upward, and the first support portion 3 and the second support portion 11 are further restricted.
Is determined in the Z direction.

In the drive mechanism for raising the second support portion 11 in the Z2 direction, the support portion 11 is lifted by elastic force, and the second rotary table 14 is moved relative to the first rotary table 8. It is preferable to be configured to be elastically pressed.

With the second support portion 11 raised to the clamp position shown in FIG. 2, the motor 12 is started, the second turntable 14 is rotated, and this turning force is applied to the first turntable 8. The large-diameter disk D1 sandwiched between the first turntable 8 and the second turntable 14 is rotated and driven. Then, the optical head 15 faces the recording surface of the large-diameter disk D1 from below, and the optical head 15 scans the entire area of the large-diameter disk D1 in the radial direction to reproduce a signal recorded on the disk.

In this disk drive, it is possible to shift from the unclamped position shown in FIG. 1 to a state in which the small-diameter disk D2 is driven. In addition, it is possible to shift from the clamped state of FIG. 2 to the driving state of the small-diameter disk D2.
1 descends and moves to the non-clamp position shown in FIG. 1, and then shifts to the clamped state of the small-diameter disk D2.

When the small-diameter disk D2 is driven, the second support portion 11 is moved from the position shown in FIG. 1 in the X2 direction, and the rotation center of the second turntable 14 is positioned at the center of the center hole D2a of the small-diameter disk D2. To a matching position. Then, as shown in FIG. 3, the second support portion 11 is raised, and the center hole D2a of the small-diameter disk D2 is clamped by the second rotary table 14. Alternatively, the second support portion 11 stops at the position where it has moved horizontally in the X2 direction, the small-diameter holders 4 and 4 descend in the Z1 direction, and the MD held by the small-diameter holders 4 and 4 descends and the small-diameter holders 4 and 4 descend. The center hole D2a of the disk D2 may be mounted on the second turntable 14.

As shown in FIG. 8, in the MD, a clamp hub H is attached to a center hole D2a of a small-diameter disk D2, and the clamp hub H is magnetically attracted to a magnet 14c embedded in a second rotary table 14. Thus, the center hole D2a of the small-diameter disk D2 is fixed to the second turntable 14.

Then, the second rotary table 14 and the small-diameter disk D2 are rotationally driven by the motor 12, the optical head 15 moves in the X direction, and the recording surface of the small-diameter disk D2 is scanned from the window formed in the cartridge C. And the signal is reproduced.

FIGS. 4 to 8 show specific embodiments of the structure of the pressing portion and the pressing member for clamping the disk. FIG. 4 is a half-sectional view showing the non-clamped state of the large-diameter disk D2 in the first embodiment, and FIG. 5 is a half-sectional view showing the clamped state of the large-diameter disk D1.

As shown in FIGS. 4 and 5, in the first turntable 8, a receiving portion 8c1 projecting in the Z1 direction is formed on the outer peripheral portion of the flange portion 8c. A ring-shaped operating projection 8a2 is integrally formed on the inner circumference of the projection 8a over the entire circumference.

In the second turntable 14, a groove 14d is formed at a boundary between the peripheral portion of the small protrusion 14c and the flange portion 14b and at a portion facing the operation protrusion 8a2. The groove 14d is formed on the entire circumference in the circumferential direction. The flange portion 14b of the second turntable 14 has a plurality of cutout portions 14e cut in the radial direction. The cutouts 14e are formed at least at three positions of the flange 14b at an angle interval of 120 degrees.

In each of the notches 14e, a pressing member 22 constituting a pressing portion for pressing the large-diameter disk D1 against the first turntable 8 is attached. The pressing member 22 is formed of a thin metal plate functioning as a leaf spring, and has a bent support piece 22c.
Is supported by the support pin 21 so as to freely swing with respect to the flange portion 14b. The base end 22b of the pressing member 22 is located in the groove 14d and faces the operation projection 8a2 of the first turntable 8. The pressing member 22
Is slightly protruded to the outer peripheral side from the flange portion 14b. The amount of protrusion is the second turntable 14
When the small projection 14a enters the exposure hole C1 of the MD cartridge C (the state of FIG. 3), the tip 22a is set so as not to hit the inner edge of the exposure hole C1.

As shown in FIG. 5, the second support 11 is raised, and the small projection 14a of the second turntable 14 is moved to the first position.
When fitted into the concave portion 8b of the turntable 8, the operation protrusion 8a2 formed on the first turntable 8 presses the base end 22b of each pressing member 22 in the Z1 direction. As a result, the pressing member 22 swings, and the peripheral portion of the center hole D1a of the large-diameter disk D1 is pushed upward by the tip 22a of the pressing member 22. Since the pressing member 22 is made of a leaf spring material, the large-diameter disk D1 is moved by the elastic force of the distal end 22a of the pressing member 22 to the first rotary table 8.
To the receiving portion 8c1.

The distal end 22a of the pressing member 22 projects elastically against the large-diameter disk D1 at a position protruding to the outer peripheral side of the flange portion 14b of the second rotary table 14, so that the large-diameter disk D1 Is reliably pressed against the first turntable 8.

If the diameter of the flange portion 14b of the second turntable 14 is made larger than the inner diameter of the center hole D1a of the large-diameter disk D1, the flange portion 14b is used as a pressing portion, and this flange portion is used. 14b allows the peripheral portion of the center hole D1a of the large-diameter disk D1 to be pressed upward. However, the small-diameter disk D shown in FIG.
Since the flange 14b needs to enter the exposure hole C1 of the cartridge C during driving of the cartridge 2, the diameter of the flange 14b cannot be made too large. Therefore, when the flange portion 14b itself is used as the pressing portion, the overlapping area between the flange portion 14b and the large-diameter disk D1 is small, and the large-diameter disk D1 may not be reliably pressed upward. Therefore, if the pressing member 22 that exerts the spring force to press the large-diameter disk D1 is provided as described above, even if the overlapping dimension between the pressing member 22 and the large-diameter disk D1 is short, the large-diameter disk D1 can be driven by the spring force. Can be reliably pressed against the first turntable 8.

Therefore, the pressing member 22 formed by the leaf spring is not necessarily limited to the one that swings. For example, the pressing member formed by a leaf spring is fixed to the flange portion 14b, and the tip of the pressing member is fixed. The large-diameter disk D1 can also be bent by deforming the large-diameter disk D1 in the Z2 direction.
Can be elastically pressed against the rotary table 8. Alternatively, a narrow, elastically deformable pressing member is integrally formed by cutting out a part of the flange portion 14b, and this pressing member is slightly protruded to the outer peripheral side of the flange portion 14b, and the distal end is directed in the Z2 direction. Form a facing projection.
By using this elastically deformable pressing member,
The large-diameter disk D1 can be reliably pressed against the first turntable 8.

FIG. 6 is a half sectional view showing the non-clamped state of the large diameter disk D1 in the second embodiment, FIG. 7 is a half sectional view showing the clamped state of the large diameter disk D1, and FIG. It is a half sectional view showing the state where it was clamped. Also in this embodiment, the first turntable 8
A ring-shaped operating projection 8a3 extending in the Z1 direction over the entire periphery of the concave portion 8b is integrally formed, but the operating projection 8a3 is more Z-shaped than the operating projection 8a2 shown in FIG.
It extends long in one direction.

In the second turntable 14, the small projections 14
A groove 14f formed over the entire circumference in the circumferential direction is provided at a boundary portion between the base portion a and the flange portion 14b.
Further, at least three cutout portions 14g cut out in the radial direction are formed in the flange portion 14b, and the pressing member 2 forming the pressing portion is formed in the cutout portion 14g.
5 are provided. The pressing member 25 is provided in the notch 14
It is swingably supported by a support pin 26 provided in g.

The base end 25b of the pressing member 25 is connected to the groove 14f.
And the operation projection 8a3 of the first turntable 8
Facing. Further, the pressing member 25 is moved from the support pin 26 to the distal end
The mass on the 5a side is formed larger, and in the non-clamp state shown in FIG. 6, due to the difference in mass, the pressing member 25 is inclined in the direction in which the tip 25a descends in the Z1 direction. However, a torsion spring may be inserted through the support pin 26, and the distal end 25a may be urged in the Z1 direction by the arm of the torsion spring.

The distal end 25a of the pressing member 25 protrudes farther outward in the radial direction than the flange portion 14b of the second turntable 14. However, since the tip 25a of the pressing member 25 is greatly inclined in the Z1 direction in the unclamped state, when the small-diameter disk D2 is clamped by the second rotary table 14, as shown in FIG. Of the cartridge C
Of the cartridge C without entering the exposure hole C1. Therefore, the pressing member 25 does not hinder the clamping of the small-diameter disk D2.

FIG. 7 shows a state where the large-diameter disk D1 is clamped. The second support 11 is raised, and the small protrusion 14 a of the second turntable 14 is moved to the first turntable 8.
Of the first rotary table 8, the operating projection 8 a 3 formed on the first rotary table 8
4f, the base end 25b of the pressing member 25 is pressed in the Z1 direction by the operation projection 8a3. Then, the pressing member 25 swings clockwise, and the periphery of the center hole D1a of the large-diameter disk D1 is pushed upward by the tip 25a, so that the large-diameter disk D1 is received by the receiving portion 8 of the first rotary table 8.
Pressed against c1.

At this time, if the arm 25c on which the base end 25b of the pressing member 25 is formed can be elastically deformed, the large-diameter disk D1 is moved by the distal end 25a of the pressing member 25 via the elastic force to the first position. Is pressed against the turntable 8. For this purpose, the pressing member 25 may be formed of a synthetic resin material, and the arm 25c may be formed to be thin. Alternatively, the entire pressing member 25 may be formed of a leaf spring material. Alternatively, only the arm 25c may be formed of a leaf spring material. Further, a structure having high rigidity in which the pressing member 25 does not elastically deform may be used. In this case, the second support 1
1 is pressed upward via a spring, and the second rotary table 14 and the first rotary table 8 are configured to be elastically pressed, so that an excessive force is applied to the pressing member 25. Can be prevented.

FIG. 8 shows a state where the small-diameter disk D2 is clamped to the second turntable 14. The clamp hub H provided in the center hole D2a of the small-diameter disk D2 is magnetically attracted to the magnet 14c of the second turntable 14. As described above, at this time, since the distal end 25a of the pressing member 25 is located below the cartridge C,
When rotating the small-diameter disk D2, the pressing member 25
Does not hinder its rotation.

In the above embodiment, as shown in FIG.
The large-diameter disc D1 is moved by the tip 25a of the pressing member 25.
Is pressed against the first turntable 8 at a position away from the center. Therefore, the large-diameter disk D1 is stably held and clamped between the first turntable 8 and the second turntable 14.

FIG. 9 is a partial front view showing still another embodiment of the present invention. In each of the above embodiments, the motor 12 is provided only on the second support portion 11, and the large-diameter disk D
1 and the small-diameter disk D2 are driven to rotate by the same motor 12, but in the one shown in FIG. 9, in addition to the motor 12 provided on the second support portion 11, the first rotary table 8 A second motor 31 for driving the support shaft 7 is provided. The second motor 31 is mounted on the first support 3 shown in FIG.

In this case, the small-diameter disk D2 is driven to rotate only by the motor 12 provided on the first support portion 11, while the large-diameter disk D1 is driven to rotate by both the motor 12 and the second motor 31. Rotated by force. Alternatively, the large-diameter disk D1 may be rotationally driven only by the second motor 31. In this case, the motor 12 is not energized.

In FIG. 9, the motor 12 mounted on the second support portion 11 may be a small motor, that is, a small motor having a torque for rotating only the small-diameter disk D2. Therefore, the second support portion 11 is small overall,
The weight is reduced, and the load when moving the second support portion 11 can be reduced. In addition, since the large-diameter disk D1 can be driven to rotate with a large torque using the second motor 31,
It is suitable for driving the large-diameter disk D1 at double speed.

In FIG. 1, the installation area B of the small-diameter disk D2 is arranged at the same height as the second support portion 11 in the X direction, and the first support portion 3 is lowered, or The first support 3 is lowered and the second support 1
1 may be raised to clamp the large-diameter disk D1. In this case, when each support 3 and 11 are separated,
The small-diameter holders 4 and 4 holding the MD are transferred to above the second support 11, and the MD is further transferred to the second support 11.
And the center of the small-diameter disk D2 is clamped to the second turntable 14.

[0076]

As described above, according to the present invention, the rotary table for the large-diameter disk and the rotary table for the small-diameter disk are opposed to each other, and the large-diameter disk is sandwiched between the two rotary tables. When a large-diameter disk and a small-diameter disk are arranged, both disks can be reliably clamped, and a clamper for clamping the large-diameter disk is not required.

Further, two kinds of disks having different diameters can be accommodated in a limited space, and both the disks can be arbitrarily selected and driven. In addition, with a common motor,
It is also possible to drive both large and small diameter disks.

[Brief description of the drawings]

FIG. 1 is a front view showing a disk device of the present invention, showing a non-clamped state of a large-diameter disk;

FIG. 2 is a front view showing a state in which the state of FIG. 1 is shifted to clamping of a large-diameter disc;

FIG. 3 is a front view showing a state in which the state of FIG. 1 is shifted to clamping of a small-diameter disk;

FIG. 4 is a half sectional view of a non-clamped state showing a first embodiment of a pressing member for pressing a large-diameter disc against a first rotary table;

FIG. 5 is a half sectional view showing a state where the large diameter disc is clamped from FIG. 4;

FIG. 6 is a half sectional view showing a second embodiment of a pressing member for pressing a large-diameter disc against a first rotary table in an unclamped state;

FIG. 7 is a half sectional view showing a state where the large diameter disc is clamped from FIG. 6;

FIG. 8 is a half sectional view showing a state in which a small-diameter disc is clamped by a second rotary table according to the second embodiment;

FIG. 9 is a partial front view of a large-diameter disk clamp state showing still another embodiment of the present invention;

[Explanation of symbols]

 A Large-diameter disk installation area B Small-diameter disk installation area C Cartridge C1 Exposed hole D1 Large-diameter disk D1a Large-diameter disk center hole D2 Small-diameter disk D2a Small-diameter disk center hole H Clamp hub 1 Housing 2 Large-diameter holder 3 1st support part 4 holder for small diameters 7 support shaft 8 first turntable 8a protrusion 8a2, 8a3 actuation protrusion 8b recess 8c flange 8c1 receiving part 11 second support part 12 motor 14 second turntable 14a small Projecting part 14b Flange part 15 Optical head 22, 25 Pressing member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiromichi Yamamoto 1-1-8 Nishi-Gotanda, Shinagawa-ku, Tokyo Alpine Inc. (72) Inventor Shinji Wakabayashi 1-1-1, Nishi-Gotanda, Shinagawa-ku, Tokyo Alpine Corporation F-term (reference) 5D038 BA04 CA03 CA04 FA05 5D046 AA11 AA12 AA19 CC01 EA04 EA08 EA15 EB01 HA01 HA05 HA06

Claims (8)

[Claims] A first rotary table having a projection into which a center hole of a large-diameter disk is fitted, a recess formed at the top of the projection, and a receiving portion for receiving a disk surface;
A first support portion for supporting the rotary table from the side opposite to the protrusion, a small protrusion into which the center hole of the small-diameter disk is fitted, and a receiving portion of the first rotary table for receiving the large-diameter disk. A second rotary table having a pressing portion for pressing the second rotary table;
A second support for supporting the second turntable from the side opposite to the small protrusion, and a motor for driving the second turntable to rotate; the first support and the second The support portion faces the non-clamp position where the protrusion and the small protrusion coaxially face each other, and the small protrusion of the first turntable is fitted into the recess of the first turntable, and Both supporting portions can be moved closer to a clamp position where the large-diameter disk is pressed against the receiving portion of the first rotary table by the pressing portion, and the large-diameter disk is positioned between the two rotary tables facing the non-clamp position. Then, when both support portions are at the clamp position, the center of the large-diameter disc can be held between the two turntables, and the small-diameter disc has the center of the small turntable of the second turntable. Can be installed at the position where it is attached to the protrusion Disk apparatus characterized by being with. 2. A head which is capable of scanning the recording area of the large-diameter disk over the entire area in the radial direction and capable of reproducing signals even from a small-diameter disk is provided on the second support portion. The disk device according to claim 1. 3. The installation area for the small-diameter disk is provided at a position where the two support portions do not hit either of the two support portions when the two support portions move from the non-clamp position to the clamp position. The small-diameter disk in the installation area is transferred to a position where the small-diameter disk in the installation area can be mounted on the second rotary table when in the unclamping position, or the small-diameter disk in the installation area can be mounted on the second rotary table. 3. The disk device according to claim 1, wherein the second support portion is movable. 4. The device according to claim 1, wherein the pressing portion of the second rotary table is configured by a pressing member that presses the large-diameter disc against the first rotary table via an elastic force. The disk device as described above. 5. A pressing member for pressing the large-diameter disc against the first rotary table by a swinging motion when a base end of the second rotary table hits the first rotary table. 4. The disk device according to claim 1, wherein the disk device comprises: 6. The pressing member, when the swinging operation,
The disk device according to claim 5, wherein the large-diameter disk is pressed against the first rotary table via an elastic force. 7. A small projection fits into the recess between the first support and the second support when the two supports move from the non-clamp position to the clamp position. 2. Positioning means for fitting with each other before the mounting is provided.
7. The disk device according to any one of items 6 to 6. 8. A second motor for driving the first rotary table for rotation is provided, and when a large-diameter disc is sandwiched between the first rotary table and the second rotary table, the second motor is rotated. 8. The large-diameter disk is rotated by only the second motor, or the large-diameter disk is rotationally driven by both the second motor and the motor that rotates the second rotary table. The disk device according to item 1.