JPH02263353A - Driving device for disk recording medium - Google Patents

Abstract

PURPOSE:To drive the disk recording media of different types with the same mechanism by setting one of two turntable members slidably in the axial direction and protruding this turntable member at the time of application. CONSTITUTION:For instance, a cartridge case 2 storing a 1st disk recording medium 3 is positioned and loaded into a cartridge adaptor 8 having an external size equal to a cartridge case 33 for a 2nd disk recording medium 34. Under such conditions, a 1st and 2nd turntable members 28 and 29 which are driven by a spindle motor are connected to a spindle 27, for example, via the screws. Then the 1st turntable member 28 is protruded over the 2nd turntable member 29 when the 1st disk recording medium 3 is used and vice versa with use of the 2nd disk recording medium 34 via the shift of both the 1st and 2nd turntable members 28 and 29 in the axial direction. Thus the 2nd disk recording medium 34 is carried and chucked by the 2nd turntable member 29. As a result, the optical disks of 5.25-inch and 3.5-inch types, for example, can be driven with the same mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc recording medium drive device for driving a disc recording medium such as an optical disc. The present invention relates to a disk recording medium drive device that can selectively drive both a 3.5-inch type optical disk and a next-generation compact optical disk, the standards and specifications of which are currently being solidified, called the 3.5-inch type.

[Prior Art] Various types of optical disk drive devices for driving 5.25-inch type optical disks are currently being proposed, but none of them drive only 5.25-inch type optical disks. This is a dedicated drive for Also,
Various optical disk beating devices for 3.5-inch type optical disks with a capacity of about 100 megabytes, which are being developed recently, are being explored, but these also drive only 3.5-inch type optical disks. It is a dedicated drive.

The reason for this is that although both 5.25-inch type and 3.5-inch type optical disks use the so-called magnetic chucking (magnetic clamping) method,
A major reason for this is that it is virtually impossible to chuck 5.25-inch type and 3.5-inch type optical discs with the same rotary table due to differences in the dimensions of their center hubs due to standards. It's for a reason.

[Problems to be Solved by the Invention] However, in order to use both 5.25-inch type and 3.5-inch type optical disks, preparing dedicated optical disk drives for each of them places a large economic burden on the user. Moreover, there are problems such as the need to switch the connection with a host-side control device such as a personal computer.

The present invention has been made in view of the above points, and its object is to chucking and drive different types of disc recording media 1, for example, 5.25-inch type and 3.5-inch type optical discs, by the same mechanism. The object of the present invention is to provide a disk recording medium oscillation device that is possible.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a first disk recording medium having a center hub, and a center hub having a larger diameter than the center hub of the first disk recording medium. In a disk recording medium drive device for rotationally driving a second disk recording medium, a first rotary table member and a second rotary table member, which are rotationally driven by the same spindle motor, are The table member is coaxially arranged with the table member on the inner circumferential side, and at least one of the first and second rotary table members is arranged so as to be slidable in the axial direction, and when the first disk recording medium is used,
The first rotary table member is positioned to protrude from the second rotary table member so that the first rotary table member supports the first disk recording medium, and the second rotary table member
When using the disc recording medium, the second rotary table member is positioned to protrude more than the first rotary table member, so that the second rotary table member supports the second disc recording medium. , configured.

Further, in order to achieve the above object, the present invention provides a first disk recording medium having a center hub, and a second disk recording medium having a center hub having a larger diameter than the center hub of the first disk recording medium. In a disk recording medium drive device for rotationally driving a disk, a rotary table member rotationally driven by a spindle motor includes a table base fixed to a spindle, a disk receiver rotatably held on the table base, and a rotary table member rotatably driven by a spindle motor. Along with having.

In this disc receiver, a receiving part for the first disc recording medium and a receiving part for the second disc recording medium are formed on different surfaces, and the receiving part for the first disc recording medium and the receiving part for the second disc recording medium are formed on different surfaces, and the receiving part for the first disc recording medium and the second disc recording medium are formed on different surfaces, and the receiving part for the first disc recording medium and the second disc recording medium are formed on different surfaces, and the rotating position of the disc receiver is selected. The device is configured to be able to take a state in which it supports the first disc recording medium and a state in which it supports the second disc recording medium.

[Function] In the present invention, for example, the cartridge case housing the first disc recording medium is positioned and installed in a cartridge adapter having external dimensions of the cartridge case for the second disc recording medium. use. By doing this, the center of the first disk recording medium when the cartridge adapter is installed in the drive device, and the center of the second disk recording medium when the cartridge for the second disk recording medium is installed in the drive device.
The center of the disc recording medium can be easily and approximately aligned with the center of the disc recording medium.

Then, the first rotary table member and the second rotary table member driven by the spindle motor are screwed to the spindle, for example, and rotation of both rotary table members is selectively prevented. The rotary table member is selectively slid in the axial direction by forward and reverse rotation of the spindle.

By this axial movement of both rotary table members, when the first disk recording medium is used, the first rotary table member is made to protrude more than the second rotary table member, and the first rotary table member is
The rotary table member supports the first disk recording medium.
Make it chuck. Further, when a second disc recording medium is used, the second rotary table member is projected, and the second disc recording medium is supported and chucked by the second table member. By doing this,
For example, 5.25 inch type and 3.5 inch type optical discs can be opened using the same mechanism.

Or again. By selecting the rotational position of a disk holder rotatably mounted on a table base fixed to a spindle, the holder for the first disk recording medium or the second disk of the disk holder can be selected. The receiver for the recording medium is alternatively set parallel to the disk surface, and either one of the receivers corresponding to this parallel state is set.
A disc recording medium is supported. By doing so, for example, 5.25-inch type and 3.5-inch type optical discs can be moved by the same mechanism.

[Example] The present invention can be used to drive a 3.5-inch type optical disc (hereinafter referred to as a first optical disc) and a 5.25-inch type optical disc (hereinafter referred to as a second optical disc). This will be explained by referring to the illustrated embodiments.

FIGS. 1 to 9 relate to one embodiment of the present invention, and FIG. 1 is a simplified sectional view of essential parts showing a state in which a first optical disc is mounted on an opening device.

In FIG. 1, 1 is a first optical disk cartridge (
3.5 inch optical disc cartridge), and a first optical disc 3 is rotatably housed in the cartridge case 2 of the cartridge case 2. In this embodiment, the first optical disc 3 is of a single-plate type. There is. 4 is a center hub of the first optical disk 3 made of a thin metal plate, and the center hub 4 is made of a thin metal plate.
A is drilled. 5 is the cartridge case 2 mentioned above.
In this embodiment, the head window is provided on one side of the head window and communicates with the center hole 6 of the cartridge case 2 (see FIG. 3). Although not shown in FIG. 1, the cartridge case 2 is provided with a slidable shutter 7 (see FIG. 3), and when the first optical disk cartridge 1 is removed from a cartridge adapter to be described later. When the shutter 7 is not in use, such as when the camera is not in use, the shutter 7 closes at least the head window 5 by a shutter spring (not shown).

Reference numeral 8 denotes a cartridge adapter, which has a shape that substantially matches the external dimensions of a second optical disk cartridge to be described later;
The first optical disc cartridge 1 is positioned and held at a predetermined position by inserting the first optical disc cartridge 1 toward the back through the insertion opening 9. When inserting the first optical disc cartridge 1 into the cartridge adapter 8, the shutter 7
As shown in the figure, by engaging the shutter opening/closing lever 10 in the cartridge adapter 8 and inserting the first optical disk cartridge 1 in the direction of the arrow in FIG. 3, it is biased counterclockwise by a spring (not shown). The shutter opening/closing lever 10 rotates in the direction of arrow B, and the shutter 7 slides in the direction of arrow C to open the head window 5.

When the first optical disk cartridge 1 is completely inserted into the cartridge adapter 8, as shown in FIG. The positioning piece 13 on the side of the cartridge adapter 8 is fitted to ensure that the first optical disk cartridge 1 is not removed and held unless the first optical disk cartridge 1 is pulled out with fingers or the like. Further, one side of the first optical disk cartridge 1 is pressed by a spring 14, and the side bone of the cartridge adapter 8 is pressed against the part so that the position of the cartridge adapter 8 is restricted in the horizontal direction. As shown in the figure, the upper surface of the first optical disk cartridge 1 is pressed by a spring 15 and pressed against the lower surface receiving portion of the cartridge adapter 8, so that its position in the vertical direction is regulated. In FIG. 1, reference numeral 16 indicates a position regulating member at the front end of the first optical disk cartridge 1. As shown in FIG.

As described above, the first optical disk cartridge 1 is inserted and
The positioned cartridge adapter 8 is inserted into the main body of the drive device through an insertion opening (not shown) of a rotating device equipped with a mechanism for sharing 3.5-inch and 5.25-inch optical disks, and is positioned and held. That is, for example, as shown in the fourth figure, the cartridge adapter 8 is inserted into the holder member 17 of the main body of the drive device, and the holder member 17
At the same time, when the cartridge adapter 8 is pushed forward in the direction of arrow A, when the holder member 17 moves forward by a predetermined amount, a pin (not shown) implanted in the side surface of the holder member 17 engages the inclined groove of the lifting guide member (also not shown). The holder member 17 and the cartridge adapter 8 are positioned when the pin descends along the vertical groove and reaches the vertical groove connected to the inclined groove. The holder member 17 is biased in the direction opposite to the arrow by a spring (not shown), and causes the eject lever (not shown) to protrude in the direction opposite to the arrow in conjunction with the above-mentioned push-down. When the eject lever is pressed, the pin of the holder member 17 is pushed up in conjunction with this, and the spring of the holder member 17 pushes back the holder member 17 and the cartridge adapter 8, which opens and closes the shutter of the drive device described later. The cartridge adapter 8 is ejected from the holder member 17 by the lever.

Note that the above-mentioned elevating and lowering mechanism of the holder member 17 and the injection mechanism are well known in the field of magnetic recording devices and the like, so details are not shown.

A head window 18 is provided on one side of the cartridge adapter 8 as shown in FIG. 1.4.

A shutter 2 is formed with a center hole 19 connected thereto, and is provided with a biasing tendency in the closing direction by a spring (not shown).
0 (FIG. 4), at least the head window 18 is closed when not in use. When inserting and positioning the car 1 heritage adapter 8 into the drive device main body as described above, the shutter opening/closing lever 21 of the device main body engages with the shutter 20 as shown in FIG. 8 moves in the six directions of arrows in the figure, the shutter opening/closing lever 21, which is biased counterclockwise by a spring (not shown), rotates in the direction of arrow B, and accordingly, the shutter 20 moves to the open position. It is designed to slide. Note that the shutter opening/closing lever 21 also functions to eject the cartridge adapter during the eject operation.

When the cartridge adapter 8 is attached to the apparatus main body, the positioning pin 23 on the apparatus main body side is fitted into the positioning hole 22 formed in the cartridge adapter 8, as shown in the first figure, and the positioning pin 23 on the apparatus main body side is held downward by the spring 24. It is firmly positioned and held in a predetermined position by being pressed. In this state, the part of the first optical disc 3 and the center are connected via the head window 18 and center hole 19 of the cartridge adapter 8 and the head window 5 and center hole 6 of the first optical disc cartridge hub 4
is exposed. And both head winds 18,5
The optical head 25 faces the first optical disc 3 via the disc 3 and reads (or writes) information. The head window 18 and center hole 19 of the cartridge adapter 8 have the same shape as the second optical disc cartridge described later, and the width of the head window 18 is the same as that of the head window 5 of the first optical disc cartridge 1. Wider than width.

Furthermore, the diameter of the center hole 19 is the same as that of the first optical disc 1.
It is set larger than the diameter of the center hole 6 of (
(See Figure 4).

In FIG. 1, 26 is a spindle motor, and a spindle 27 serving as its output shaft has a first rotary table member 28 and a second rotary table member 29 that are rotationally driven by the spindle motor 26. It is attached so that it can slide in the axial direction. In the state shown in the figure, the first rotary table member 28 located on the inner circumferential side rises to support the first optical disc 3 and chuck the center hub 4. Note that here, the first
In the figure, 30 indicates a write protector (erasure prevention) of the first optical disk cartridge 1, and 31 indicates a sensor for this protector.

Note that the above-mentioned first and second rotary table members 28°29
The axial movement mechanism and charging mechanism will be described in detail later.

FIG. 2 shows a state in which the second optical disc is mounted on the drive device. In the figure, reference numeral 32 denotes a second optical disk cartridge (5, 25-inch optical disk cartridge), and a second optical disk 34 is rotatably housed in a cartridge case 33 of the second optical disk cartridge. In this embodiment, the second optical disk 34 is of a double-sided type having a bonded/sandwich structure, and has a center hub 35 made of thin metal plates on the top and bottom, and a center hole 35a is bored in the center hub 35. There is. This center hub 35
is larger in diameter than the center hub 4 of the first optical disc 3 according to the standard, but the diameter of the center hole 35a is set equal to the diameter of the center hole 4a of the center hub 4. .

Reference numeral 36 denotes head windows formed on both sides of the cartridge case 33, each of which communicates with the center hole 37. The head window 36 and center hole 37 have substantially the same shape as the head window 18 and center hole 19 of the cartridge adapter 8 described above, and are closed by a shutter (not shown) when not in use.

The second optical disk cartridge 32 is positioned and attached to the apparatus main body in exactly the same manner as the above-described insertion operation of the cartridge adapter 8 into the apparatus main body, and the shutter is released. Note that 38 is a positioning hole into which the positioning pin 23 is fitted, 39 is a light protector, and 40 is a sensor for this protector. In the state shown in FIG. 2, the second rotary table member 29 located on the outer circumferential side rises to support the second optical disk 34 and chuck the center hub 35.

Next, the details and operation of the first and second rotary table members 28, 29 will be explained with reference to FIGS. 5 to 8. FIG. 5 shows the state in which the second optical disc 34 is chucked.

In the figure, 42 and 43 are threaded parts formed on the spindle 27, both of which have right-handed threads, and the first rotary table member 28 is screwed into one of the threaded parts 42. A second rotary table member 29 is screwed into the other threaded portion 43, and in the state shown in the figure, the first rotary table member 28 is in contact with the flange portion 44 of the spindle 27. The second rotary table member 29 is at the lower limit position, and the second rotary table member 29 is at the upper limit position where it abuts the flange portion 44.

A magnet 45 for magnetically chucking the center hub 4 of the first optical disc 3 is attached to the first rotary table member 28, and a disc receiving part 46 is attached to the upper part of the magnet 45. A plurality of notches 47 are formed on the outer periphery. Similarly, the second rotary table member 29 has a magnet 48 for magnetically chucking the center hub 35 of the second optical disk 34.
is attached via a support disk 49, and a disk receiving portion 5o is formed in the upper portion thereof, and a plurality of notches 51 are formed in the outer peripheral portion thereof.

Reference numeral 52 denotes a locking pin which can be moved left and right in the drawing by an appropriate motion source (not shown) and can engage with the notch 47 of the first rotary table member 28. Reference numeral 53 denotes a locking member which has a ring or cylinder shape as a whole and is movable only in the vertical direction, and is loosely fitted to the spindle 27 and driven by an appropriate drive source 54 such as a motor that is in contact with the outer surface of the cylindrical portion. It is driven up and down, and inside the cylindrical part,
Projections 53a (projections extending vertically) that can engage with the notches 51 of the second rotary table member 29 are provided at equal intervals in the circumferential direction (in this embodiment, two at intervals of 180°). . Note that 55 is a stopper that defines the upper limit position of the first rotary table member 28.

In the state shown in FIG. 5, the center portion of the second optical disk 34 is supported by the disk receiving portion 50 of the second rotary table member 29 in the raised position, and is also inserted into the center hole 35a of the center hub 35. The tip of the spindle 27 is engaged. Also.

The center hub 35 is made of a soft magnetic material, and includes a permanent magnet 48, a support disk 49 made of a soft magnetic material, and a magnetic circuit made of a first rotary table member 28 made of a soft magnetic material. It is magnetically chucked by. Therefore, when the spindle 27 is rotated clockwise by the spindle motor 26 in this state (rotation direction for reproduction or recording), the second optical disk 34 is also rotated and opened in the same direction together with the second rotary table member 29. In addition.

At this time, the first rotary table member 28 is also rotating.

Next, the operation of shifting from the state shown in FIG. 5 to the state in which the first optical disc 3 shown in the first diagram is chucked will be described. In this transition operation, first, the second optical disc 3
4, the second rotary table member 29 is stopped at a predetermined rotational position, and then the locking member 53 is raised to engage the notch 51 of the second rotary table member 29. The rotation of the second rotary table member 29 is suppressed. When the spindle 27 is rotated to the left in this state, the second rotary table member 29 is lowered as shown in the sixth figure. (Note that during this time, the first rotary table member 2
8 is not engaged with the stop pin 52, so it rotates freely together with the spindle 27 and is maintained at a constant height.)
. Furthermore, when the left rotation of the spindle 27 continues and the second rotary table member 29 reaches the lowering limit position shown in FIG. Descent is stopped. In this state, the spindle 27 and the second rotary table member are connected to the seventh rotary table member.
As shown in the figures through FIG. 8, they are not connected in a threaded relationship and are loosely fitted by the unthreaded small diameter portion 27a of the spindle 27, so that the rotary table member 29 is prevented from rotating by the locking member 53. Even when restrained, the spindle 27 is free to rotate. (Note that in order to screw the rotary table member 29 in this loosely fitted state again with the threaded portion 43, it is only necessary to first drive the rotary table 29 upward by the shame motion source 54.) 6. Next, the first When the optical disc 3 (the first optical disc cartridge 1, that is, the cartridge adapter 8) is installed in the main body of the apparatus, the first rotary table member 2 is at a predetermined rotation stop position.
8, the locking pin 52 advances to the right in the figure and engages with the notch 47, thereby inhibiting the rotation of the first rotary table member 28. Thereafter, the spindle 27 is rotated clockwise, and the first rotary table member 28 begins to rise as shown in FIG.

When the first rotary table member 28 reaches the upper limit position shown in FIG. 8 by the subsequent clockwise rotation of the spindle 27, the spindle 2
7 is stopped, and then the locking pin 52 moves to the left in the figure to release the rotation inhibition of the first rotary table member 28. In the state shown in FIG. 8, the center portion of the first optical disk 3 is supported by the disk receiving portion 46 of the first rotary table member 28 in the raised position, and the center hole of the center hub 4 The tip of the spindle 27 is engaged with 4a. The center hub 4 is made of a soft magnetic material, and includes a permanent magnet 45, a first rotary table member 28 made of a soft magnetic material, and a permanent magnet 45. And, it is magnetically chucked by a magnetic circuit constituted by the center hub 4 itself. Therefore, in this state, when the spindle 27 is rotated clockwise by the spindle motor 26 (rotation direction for reproduction or recording), the first optical disc 3 is also rotated in the same direction together with the first rotary table member 28.

Note that the transition from the chucking state of the first optical disc 3 shown in FIG. 8 to the chucking state of the second optical disc 34 shown in FIG.

In this embodiment having such a configuration, different types of optical discs, that is, the first optical disc (
3.5-inch optical disk) and a second optical disk (5.2-inch optical disk)
5-inch optical disk) can be chucked and driven. Further, in this embodiment, the threaded portions 42 and 43 of the spindle 27 are both formed with right-handed threads, and the first and second rotary table members 28 and 29 are rotated clockwise by the spindle 27 at the upper limit position. Since each optical disk is driven to rotate, there is no adverse effect due to loosening of the screws.

FIG. 9 is a sectional view of a main part showing an example of the optical head 25 described above. The optical head 25 shown in the figure is a so-called galvano-type optical head, in which a lens barrel 61, which is held via spring plates 59 and 60, is attached to a support member 57, 58 that is integrated with the optical head main body 56, and a magnet 62. The mirror 64 is driven in the direction of the arrow in the drawing in cooperation with the coil 63 to perform autofocus control, and the galvanometer mirror 64 is appropriately rotated by a perturbation source to swing the optical axis to perform tracking control. By the way, in this embodiment, since the width of the head window 5 of the first optical disk cartridge 1 described above is narrow, if the width of the tip portion of the optical head 25 is large, the head window 5
The cartridge case 2 comes into contact with the surrounding area of the cartridge case 2.

Therefore, only the objective lens system portion 65 of the optical head 25 is
As shown in the figure, it is configured to protrude from the support member 58 by a predetermined amount or more (for example, 1.5 rrLm or more) to avoid such a situation. In addition, the optical head 25 is not limited to the above-mentioned galvano system.As shown in FIG.
A pin support method may be used in which the optical head is rotated about a pin 66, and in this case, the objective lens system portion 67 is projected from the optical head body by a predetermined amount. Further, as shown in No. 11, a spring hinge system may be used in which the optical head 25B is held by a hinge spring 68 and movable in the horizontal and vertical directions. In this case as well, the objective lens system portion 69 is moved a predetermined distance from the optical head body. considered to be outstanding.

FIG. 12 to FIG. 16 are diagrams for explaining the switching and chucking operation of the rotary table member and the first and second optical disks 3, 34 according to other embodiments of the present invention.
FIG. 2 shows a state in which the second optical disc 34 is chucked.

In FIG. 12, 7o represents the spindle motor 26.
A spindle 71, which is the output shaft of the spindle 7o, is a rotary table member that is fixed to the spindle and rotated integrally with the spindle 7o. The rotary table member 71 is the spindle 7
0 and the table base 72 attached at the same time to the table base 7.
2 has a plurality of disk receivers 74 (four in the embodiment) rotatably mounted around a support shaft 73, and on the outer periphery of the disk receivers 74, there are disk receivers 74 that rotate integrally with the rotary table member 71. A lock ring 75 that can be slid up and down in the drawing is also provided.

The table base 72 has the first and second optical discs 3
, 34, and a plurality of protrusions 77 are provided on its upper surface. The disk receiver 74 is.

It has a broken-circuit shape, and its base is attached so as to straddle the projection 77, and is rotatably held by the support shaft 73 (see FIG. 16). In addition, the disk receiver 74
, a first receiving part 78 for supporting the first optical disc 3 and a second receiving part 79 for supporting the second optical disc 34 are provided so as to be orthogonal to each other, In the state shown in FIG. 12, the second receiving portion 79 is in the horizontal position shown, perpendicular to the spindle 70. In addition, the 12th
In the figures to FIG. 16, the disk receiver 74 is shown in different cross sections on the left and right sides of the figure.

The lock ring 75 is formed with an annular projection 80.81 and an annular locking groove 82 located between the annular projections 80.81. A notch 83 (see FIGS. 13 and 14) is formed. Reference numeral 84 denotes a lever that can engage and disengage from the locking groove 82, and is driven up and down as shown in the figure by an appropriate drive such as a motor. By engaging with the locking groove 82 of 75,
The lock ring 75 is held in the illustrated position in contact with the base of the disk receiver 74, thereby preventing the disk receiver 74 from falling outward due to centrifugal force when the rotary table member 71 rotates. It is supposed to be done.

Now, in the state shown in the twelfth figure, the second optical disc 3
4 is supported by the first receiving part 79, and the tip of the spindle 70 is engaged with the center hole 35a of the center hub 35, and the center hub 35 is supported by the magnet 76. It is magnetically chucked. Therefore, when the rotary table member 7i is rotated by the spindle motor 26 in this state, the second optical disk 34 is also rotationally driven in the same direction.

Next, a description will be given of a transition operation from the state shown in FIG. 12 to enable chucking of the first optical disc 3. In this transition, the lever 84 is first opened downward to lower the lock ring 81 to the position shown in FIG. 13. Next, the one-turn table member 71 is stopped at a predetermined rotational position, and the notch 83 of the lock ring 75 and the tip of the lever 84 are aligned. In this way, in order to match, the rotational position of the rotary table member 71 may be detected by a sensor and stopped. Next, when the lever 84 is driven upward, the tip of the lever 84 is pulled out from the lock ring 75, pushing up and rotating the disk receiver 74 as shown in FIG. 14, and rotating the disk receiver 74 by 90 degrees. The state is then shifted to the state shown in FIG.

When the disk receiver 74 rotates 90 degrees as described above,
The first receiving portion 78 is in a horizontal state, and a disk receiving surface having a diameter smaller than that of the second receiving portion 79 is formed by the first receiving portion 78 . Subsequently, the lever 84 is lowered from the position shown in FIG. 14, and after positioning the tip of the lever 84 within the locking groove 82 of the lock ring 75, the lock ring 75 (rotary table member 71) is rotated by a predetermined amount. to engage the lock ring 75 and lever 84. Thereafter, the lever 84 is driven upward to raise the lock ring 75 to the position shown in Figure 15. As a result, the disk receiver 74 is locked by the lock ring 75, and when the rotary table member 71 rotates, the disk receiver 74 is locked.
4 is prevented from tilting outward due to centrifugal force.

When the first optical disc 3 (the first optical disc cartridge, that is, the cartridge adapter 8) is installed in the main body of the apparatus while the rotary table member 71 is in the state shown in Fig. 15, the state shown in Fig. The central portion of the first optical disc 3 is supported by the first receiving portion 78 of the disc receiving body 74, and the tip of the spindle 70 is engaged with the center hole 4a of the center hub 4. , the center hub 4 is magnetically chucked by the magnet 76. Therefore, in this state, the spindle 70
When the rotary table member 71 is rotationally driven, the first
The optical disks 3 are also driven to rotate in the same direction.

In addition, in order to reversely shift the rotary table member 71 from the state shown in the 15th figure to the state shown in the 12th figure, the lock ring 75 is lowered by the lever 84 from the position shown in the 15th figure to unlock the disk receiver 74. Then, the spindle 70 is rotated at high speed to cause the disk receiver 74 to fall outward by centrifugal force, and then the lock ring 75 is raised to the position shown in the twelfth figure using the lever 84.

Even in this embodiment having such a configuration, effects equivalent to those of the previous embodiment can be obtained.

Examples other than the above-mentioned example will be described below.

(1) In the above embodiment, the magnetic circuit (magnet 48, support disk 49, etc.) is placed on the second rotary table member 29, but the second rotary table member 29 itself is made of a magnetic material,
A configuration may also be adopted in which the magnetic hub of the optical disk is directly attracted to this.

(2) The shape of the locking member 53 may be a semi-cylindrical shape or a plurality of pin shapes arranged in five circumferential directions instead of the cylindrical shape (ring shape, cylinder shape) as described above. can. In short, any structure may be used as long as it stops the rotation of the rotary table member 29 and does not prevent its vertical movement.

(3) In the above embodiment, the lower part of the threaded portion 43 is formed into a small diameter portion 27a without threading, and the second rotary table member 29 is loosely fitted into this. It may be provided for the rotary table member 28 of.

(4) A spare ID hole is provided in the cartridge case to indicate the type of disc (for example, a 5.25-inch disc has no hole, and a 3.5-inch disc has a hole) to indicate the type of disc. Set the disk type to this I.
By detecting with D hole.

It can be configured to automatically select a disk supporting member (rotary table member, etc.) that fits the disk and have it take the protruding position.

(5) In the above embodiment, a magnetic means was used as a chucking means for the center hub, but instead of this, various attachment methods such as a mechanical clamp may be used.

(6) Although the above embodiment uses a cartridge adapter for a small cartridge, it can also be applied to an apparatus in which recording and reproduction are performed without using a cartridge adapter. Also,
In the above embodiment, recording and playback is performed while the disc is in the cartridge, but it can also be applied to systems where the disc is recorded and played back in a bare state (the cartridge is taken out during recording and playback, or the disc does not originally have a cartridge). can.

(7) In the above embodiments, a disk having a center hub has been described, but the present invention can also be applied to disks without a center hub, such as CDs and LDs. In this case, the disk is clamped by upper and lower clamp members around the center hole, but the upper clamp member is of the same diameter (same member) for both large-diameter disks and small-diameter disks. ) may be used. However, it is necessary to use a lower clamp member with a larger diameter for a large diameter disk and a smaller diameter for a small diameter disk. This is because the innermost track diameter of the recording area of a small diameter disc is usually much smaller than the diameter of the innermost track of the recording area of a large diameter disc, so the clamp member does not interfere with the recording area. This is because it is necessary to do so. There is no such restriction on the upper clamp member because information is recorded only on the bottom surface of the disk and not on the top surface (or because information is not recorded or read from the top surface). The embodiments shown in FIGS. 5 to 8 and the embodiments shown in FIGS. 12 to 16 are as follows.
Since the diameter of the clamp member is essentially selected to be large for large-diameter disks and small for small-diameter disks, by using this as the lower clamp member, the hub of CDs, LDs, etc. This can be applied to discs without discs.

In this case, as is clear from FIG.

When using a small-diameter CD disc, the large-diameter rotary table 29 (lower clamp member) is located well below the disc, so the optical head is moved to the innermost track of the CD disc (the rotational table 29).

[Effects of the Invention] As described above, according to the present invention, it is possible to realize a disk drive device that can operate, for example, a 5.25-inch optical disk and a 3.5-inch optical disk using the same mechanism, which is different from the conventional one. Compared to separately preparing two disk drive devices, the total cost reduction effect for the user is significant.

[Brief explanation of drawings]

FIGS. 1 to 11 relate to one embodiment of the present invention, and FIG. 1 shows how the first optical disc in the first optical disc cartridge housed in the cartridge adapter is mounted on the main body of the apparatus.
A sectional view of the main part showing the chucked state, Figure 2 is the
a cross-sectional view of main parts showing a state in which the second optical disc in the optical disc cartridge is mounted and chucked in the apparatus main body;
FIG. 3 is an explanatory diagram showing the insertion operation of the first optical disk cartridge into the cartridge adapter, FIG. 4 is an explanatory diagram showing the insertion operation of the cartridge adapter into the main body of the apparatus, and FIGS. FIG. 9 is a sectional view of a main part of the optical head, and FIGS. 10 and 11 are simplified perspective views showing modifications of the optical head. Figures, Figures 12-1
6 relates to another embodiment of the present invention, FIGS. 12 to 15 are explanatory views of the operation of the rotary table member, and FIG. 16 is a perspective view of the rotary table member. 1...First optical disk cartridge, 2...
... Cartridge case, 3 ... First optical disc, 4 ... Center hub, 5 ...
・Head wind, 6...Center hole, 7
...Shutter, 8...Cartridge adapter 18...Head window, 19...
...Center hole, 20...Shutter,
22...Positioning hole, 23...Positioning pin, 25.25A, 25B...Optical head, 26...Spindle motor, 27...
・Spindle, 28...First rotary table member, 29...Second rotary table member, 32.
...Second optical disk cartridge, 33...
...Cartridge case, 34...Second optical disc, 35...Center hub, 36...
...Head window, 37...Center hole, 42.43...Screw part, 45...
Magnet, 46...Disk receiving part, 47...
...Notch, 48...Magnet, 49...
Support disc, 50...Disk receiving part, 51...
... Notch, 52 ... Locking pin, 53 ...
... Locking member, 65, 67.69 ... Objective lens system part, 70 ... Spindle, 71 ...
...Rotary table member, 72 table base, 74.
... Disk receiver, 75 ... Lock ring, 76 ... Magnet, 78 ... First receiving part, 79 ... Second Receiving part. 82...Latching groove, 83...Notch, 84...Lever Fig. 3 Fig. 4 -J Fig. 5 Fig. 6 Fig. 9 Fig. 1O Fig. 1/S Figure 7 Figure 12 Figure 14 Figure 16

Claims (8)

[Claims] (1) a first disk recording medium having a center hub;
A disk recording medium drive device for rotationally driving a second disk recording medium having a center hub having a larger diameter than that of the center hub of the first disk recording medium, the disk recording medium being rotationally driven by the same spindle motor. The first rotary table member and the second rotary table member are coaxially arranged with the first rotary table member on the inner peripheral side, and at least one of the first and second rotary table members is arranged coaxially. The first rotary table member is arranged to be slidable in the axial direction, and when the first disc recording medium is used, the first rotary table member is moved to the second rotary table member.
The first rotary table member supports the first disc recording medium at a position that protrudes from the rotary table member, and when the second disc recording medium is used,
Disk recording, characterized in that the second rotary table member is arranged to protrude more than the first rotary table member, so that the second rotary table member supports the second disk recording medium. Media drive. (2) The disk recording medium drive device according to claim 1, wherein the first rotary table member and the second rotary table member are both movable in the axial direction. (3) In claim 1, the center hub of the first disc recording medium and the center hub of the second disc recording medium are formed of thin metal plates, and the first rotary table member and the second A disk recording medium drive device, characterized in that each rotary table member is provided with a magnet for magnetically chucking a center hub. (4) a first disk recording medium having a center hub;
A disk recording medium drive device for rotationally driving a second disk recording medium having a center hub having a larger diameter than the center hub of the first disk recording medium, the rotary table being rotationally driven by a spindle motor. The member includes a table base fixed to a spindle, and a disk receiver rotatably held on the table base, and the disk receiver includes a receiver for the first disk recording medium and a disk receiver rotatably held on the table base. The second disk recording medium receiving portion is formed on different surfaces, and the first disk recording medium is supported by selecting the rotational position of the disk receiving member, and the second disk recording medium is supported. 1. A disk recording medium drive device, characterized in that it can assume a state in which it carries a. (5) In claim 4, the center hub of the first disk recording medium and the center hub of the second disk recording medium are formed of thin metal plates, and the table base of the rotary table member includes the center hub of the first disk recording medium and the second disk recording medium. A disk recording medium drive device, characterized in that a magnet is provided for magnetically chucking the center hub of the first disk recording medium and the center hub of the second disk recording medium. (6) The disk recording medium drive device according to claim 1 or 4, wherein the first disk recording medium and the second disk recording medium are optical disks each housed in a cartridge case. (7) In claim 6, the cartridge case for the first disc recording medium is used while being positioned and installed within a cartridge adapter having external dimensions of the cartridge case for the second disc recording medium. A disc recording medium drive device, wherein the cartridge case for the second disc recording medium and the cartridge adapter are positioned by the same positioning mechanism within the mounting main body. (8) In claim 6, the head window width of the cartridge case for the first disc recording medium is set narrower than the head window width of the cartridge case for the second disc recording medium, and the optical head is , characterized in that only the objective lens system portion of the optical head is protruded by a predetermined amount so that its tip portion does not come into contact with the cartridge case surface near the head window of the cartridge case for the first disc recording medium. A disk recording medium drive device.