JPH0714274A - Turntable device - Google Patents

Abstract

PURPOSE:To obtain a compatible turntable device on which a large-diameter disk and a second disk housed inside a cartridge can be placed in a disk drive apparatus in which both disks can be recorded and reproduced. CONSTITUTION:A large-diameter disk centering member 10 and a small-diameter disk centering member 14 whose centering diameter is different from each other are attached respectively to a turntable base 7 so as to be freely movable up and down. When a large-diameter disk 1 is placed, the inner circumferential part of its center hole 1a is centered by a taper part 10a for the large-diameter disk centering member 10, and the surface of the turntable base 7 is held via a spacer 11. In addition, when a small-diameter disk 3 is placed, it is centered by the small-diameter disk centering member 14, and it is held in its axial direction by a small-disk mounting face 7b for the turntable base 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable device in an optical disk drive device for recording / reproducing or the like.

[0002]

2. Description of the Related Art There are various types of optical discs, and in addition to those used as they are, some are contained in a cartridge. A separate player is required to record or reproduce information on these various optical discs. These disc players are provided with a turntable device for mounting a dedicated disc, a disc cartridge, or the like.

[0003]

However, the shape of the disk center, for example, the diameter of the disk center, the height of the turntable mounting reference surface with respect to the information recording surface, and the like are different between the optical disk and the disk cartridge. Therefore, in the turntable devices on which the respective optical disks are mounted, the distance from the optical pickup to the recording surface of the disk is different. Therefore, there is a problem in that a single optical disk and a disk cartridge cannot be placed on a common turntable device to reproduce or record information.

The present invention has been made in view of such conventional problems, and provides a turntable device capable of mounting disks or disk cartridges having different shapes in order to record or reproduce information. The purpose is to do.

[0005]

According to a first aspect of the present invention, a large-diameter first disk or a small-diameter second disk held in a disk cartridge is mounted to reproduce and record signals. A turntable device used in a disk drive device, comprising: a cylindrical part attached to an output shaft of a motor; a mounting part for a disc-shaped second disk centering on a rotation shaft; and one of the mounting parts. A turntable base integrally formed with a spacer retreat part in which parts are cut out at equal intervals in the circumferential direction, and a tilt guide having a tilted surface formed in the lower part of the mounting part, and a cylindrical part of the turntable base. First
A ring portion having a central opening, which is held by the plate spring so as to be finely movable in the rotation direction and the rotation axis direction, and protrudes in the rotation axis direction from the ring portion to be fitted into the opening of the first disk. A large-diameter disc centering member integrally formed with a tapered portion and guide holes in which a part of the annular portion is cut out at equal intervals along the circumferential direction, and a second leaf spring on the turntable base. And a disc-shaped plate mounting portion centered on the rotation shaft, which is held by the upper part of the turntable base so as to be finely movable in the rotation axis direction and the rotation direction, respectively, and the disk mounting portion and the circumferential direction. And a concave fitting portion provided adjacent to the disk mounting portion, and vertically formed at a lower portion of the disc mounting portion.
A spacer having an engaging portion that engages with the leaf spring, and when the first disc is placed, the disc placing portion of the spacer is placed on the second disc placing portion of the turntable base. When overlapped, the opening of the first disc engages with the taper portion of the large-diameter disc centering member to define its center, and when the second disc is placed, the taper portion of the large-diameter disc centering member is The second disk spring moves backward by being pressed by the inner peripheral surface of the second disk, and the engaging portion of the spacer is rotated along the inclined surface of the tilt guide of the turntable base by the elastic force of the second plate spring, so that the disk is mounted. The placing portion is housed in the spacer retreating portion, and the second disc is held on the disc placing portion of the turntable base.

The invention according to claim 2 of the present application is used in a disk drive device for reproducing and recording signals by mounting a large-diameter first disk or a small-diameter second disk held in a disk cartridge. A turntable device according to claim 1, wherein a cylindrical portion attached to an output shaft of a motor, a mounting portion of a disk-shaped second disk centering on a rotation shaft, and a portion of the mounting portion are arranged in a circumferential direction. A turntable base integrally formed with a spacer retracting portion cut out at equal intervals and a tilting guide having a tilting surface formed on a lower portion of the mounting portion, and a first leaf spring in a cylindrical portion of the turntable base. An annular portion that is held so as to be finely movable in the rotation direction and the rotation axis direction through and has an opening in the center, and a taper portion that protrudes from the annular portion in the rotation axis direction and that fits into the opening of the first disc; And a part of the annular part is circumferential Along with a large-diameter disc centering member integrally formed with guide holes notched at equal intervals, and a third spring attached to the turntable base, which is finely held in the rotational axis direction. A second part which forms part of a conical surface upward to fit into the opening of the second disk
A small-diameter disc centering member having a tapered portion of
When mounting the disc, the disc mounting portion of the spacer overlaps the second disc mounting portion of the turntable base and the opening of the first disc engages with the taper portion of the large-diameter disc centering member. When the second disc is placed, the taper portion of the small-diameter disc centering member performs centering of the second disc, and the taper portion of the large-diameter disc centering member causes the second disc to center. The disk mounting portion is retracted by being pressed by the inner peripheral surface of the disk, and the engaging portion of the spacer is rotated along the inclined surface of the inclined guide of the turntable base by the elastic force of the second plate spring. Is stored in the spacer retreat portion and holds the second disc on the disc mounting portion of the turntable base.

[0007]

According to the present invention having such features, the first
When the disk is placed on the turntable device, the taper portion of the large-diameter disk centering member presses the first disk side to center the first disk. Further, the engaging portion of the spacer moves to the first disk side along the inclined surface of the inclined guide of the turntable base. Further, the disk mounting portion of the spacer overlaps the second disk mounting portion of the turntable base. This places the first disk on the spacer.

When the disk cartridge containing the second disk is placed, the taper portion of the large-diameter disk centering member is pressed against the inner peripheral surface of the second disk and moves backward. The engaging portion of the spacer rotates along the inclined surface of the inclined guide of the turntable base by the elastic force of the second leaf spring. At the same time, the disk mounting portion of the spacer is housed in the spacer retracting portion of the turntable base. In this way, the second disk is mounted on the small-diameter disk mounting surface of the turntable base. Therefore, the same disk drive device can be used to reproduce or record the first and second disks.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An optical disk turntable device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a turntable device when a large-diameter first disc (here, compact disc) 1 is placed, and FIG. 2 is a disc cartridge of a small-diameter second disc (here, MD disc). It is sectional drawing of a turntable apparatus when 2 is mounted. FIG. 3 is an exploded perspective view showing the structure of the main part of the turntable device. 4 and 5 are enlarged cross-sectional views of the central portion of FIGS. 1 and 2, respectively.

As shown in FIG. 2, the disc cartridge 2 holds a second disc 3 in a shell 4 so as to be rotatable. Drive motor 5 is disk 1 or disk 3
Is a spindle motor that drives to rotate. Drive motor 5
Is fixed to the chassis 6 of the turntable device, and its output shaft 5a is mounted above the opening provided in the chassis 6.

The turntable base 7 holds a large-diameter disk centering member and a small-diameter disk centering member, which will be described later, and is press-fitted and fixed to the output shaft 5a of the drive motor 5. FIG. 6 is a drawing showing the structure of the turntable base 7, where (a) is an end view taken along the line AA ′,
3B is a top plan view, FIG. 3C is a side view, and FIG. 3B is a perspective view. The turntable base 7 has a brim shape, and is integrally formed with a convex portion having a through hole in the center, a disk portion, and a cylindrical portion on the outer periphery. As shown in FIG. 6A, the convex portion located on the upper side is a stepped convex portion in which a flat plate, a cone and a cylinder are integrally molded. The central step is a support seat surface of a leaf spring described later. Further, the uppermost step is a supporting seat surface of the yoke described later. As shown in FIGS. 6A and 3B, the disc portion of the turntable base 7 is formed with three sets of spacer retreating portions 7a and three sets of small-diameter disk mounting portions 7b, respectively.

The spacer retracting portion 7a is a portion cut out at a pitch of 120 degrees along the outer circumference of the disk portion, and serves as a space for retracting a spacer described later. Moreover, the small diameter disk mounting part 7
6B, a flat surface is formed along the outer circumference of the disk portion at a pitch of 120 degrees, and constitutes a mounting surface of the disk 3.

As shown in FIGS. 3 (b), 6 (b) and 6 (c), the turntable base 7 is provided with a 3 disc under the outer periphery of the disc portion.
A pair of tilt guides 7c is formed. Inclined guide 7c
In the above, the boundary portion between the spacer retreat portion 7a and the small-diameter disk mounting portion 7b is formed in a rectangular shape downward.
That is, as shown in FIG. 6 (c), the inclined guide 7c is formed with an inclined surface having an angle of 30 degrees with respect to the central axis, and guides a large-diameter disk centering member described later in the vertical direction along the central axis. Is. A cylindrical portion located under the turntable base 7 is a boss for the output shaft 5a of the drive motor 5, and a stepped surface for holding a circular member is formed on the lower surface thereof. Further, as shown in FIG. 3B, two holes 7d are opened at the boundary between the disc portion and the convex portion of the turntable base 7. The hole 7d is a stop hole that engages with a part of a leaf spring described later.

Next, the bearing 8 shown in FIGS. 4 and 5 is a member to be inserted into the outer circumference of the cylindrical portion of the turntable base 7, and is a member for holding the leaf spring 9. 7A and 7B are views showing the structure of the bearing 8, where FIG. 7A is an end view along the central axis, FIG. 7B is a plan view, and FIG. 7C is a side view. As shown in FIGS. 7A and 7C, an outer peripheral groove 8a is formed in the outer peripheral portion of the bearing 8. The outer peripheral groove 8 a is a groove that holds the inner peripheral portion of the leaf spring 9.

In the first leaf spring 9 shown in FIGS. 3 to 5, the inner peripheral portion is held by the bearing 8 and the outer peripheral portion is fitted into the large-diameter disc centering member 10, and the large-diameter disc centering member 10 is inserted. It is a spring that holds it up and down. Incidentally, as shown in FIG. 3D, the leaf spring 9 is coaxially fitted when the large-diameter disc centering member 10 is insert-molded. 8A and 8B are drawings showing the structure of the leaf spring 9, where FIG. 8A is a plan view and FIG. 8B is a side view. As shown in FIG. 8A, the leaf spring 9 is formed by punching a circular thin plate of stainless steel for spring, and is integrally formed with an inner peripheral portion 9a, an outer peripheral portion 9b and a spring portion 9c. The spring portion 9c is a blade-shaped portion between the outer peripheral portion 9b and the inner peripheral portion 9a, and when the inner peripheral portion 9a is fixed, the spring portion 9c bends in the central axis direction while rotating the outer peripheral portion 9b.

Large-diameter disk centering member 1 shown in FIGS.
0 is for centering while holding the center hole 1a of the disk 1. Further, when the disc cartridge 2 is placed, the large-diameter disc centering member 10 retracts downward and holds the placement reference plane P2 of the disc 3 as shown in FIG. FIG. 9 is a drawing showing the configuration of the large-diameter disc centering member 10, where (a) is an end view taken along the line BB ′,
3B is a top plan view, FIG. 3C is a side view, and FIG. 3D is a perspective view. As shown in FIG. 9 (a), the large-diameter disc centering member 10 is formed by integrally forming a cylindrical portion 10a and an annular portion 10b.
A pair of tapered portions 10c is formed. As shown in FIG. 3D, the tapered portion 10c has an inclined surface formed so as to be a part of a conical side surface, holds the center hole 1a of the disk 1 as shown in FIG. Output shaft 5
The disk 1 is rotated coaxially with a. Ie 3
The diameter of the circle formed by the tips of the two tapered portions 10c is smaller than that of the center hole 1a of the disk 1 and the three tapered portions 10c are formed.
The diameter of the circle formed by the root of the disc is the center hole 1a of the disc 1.
Greater than

The annular portion 10 of the large-diameter disc centering member 10
An inner peripheral groove 10e for holding the leaf spring 9 is provided on the inner surface of b.
Is provided. Further, as shown in FIGS. 9 (b) and 3 (d), the cylindrical portion 10a has three guide holes 10d.
It is cut out every time. The guide hole 10d is for the disc 3
Is used as a guide hole when the tilt guide 7c of the turntable base 7 is lowered.

Next, the spacer 11 shown in FIGS. 1 to 5 holds the disk 1 in contact with the mounting reference plane P1 when the disk 1 is used, and holds the mounting reference plane P2 when the disk 3 is used. It is a member that does. 3 (a) is a perspective view of the spacer 11, FIG. 10 (a) is an end view including the central axis, (b) is an upper plan view, and (c) is a side view. The spacer 11 is an annular member, and along the outer circumference thereof
Three sets of disc mounting portions 11a and three sets of fitting portions 11b are formed at a pitch of 120 degrees. Disk mount 11
a is a flange protruding in three directions toward the outer periphery,
The upper surface thereof is flat so as to come into contact with the mounting reference surface P1 of the disk 1. As shown in FIG. 3A, the fitting portion 11b is a concave portion provided between the disk mounting portion 11a and the adjacent convex portion 11c, and is a groove for guiding the taper portion 10c of the large-diameter disc centering member 10. Is.

As shown in FIGS. 1 and 2, the plate thickness of the disk mounting portion 11a is the height of the information recording surfaces of the disks 1 and 3 and the mounting reference surfaces P1 and P2 of the disks 1 and 3, respectively. Matches the difference between. Further, as shown in the plan view of FIG. 16, the clearance between each side surface of the disk mounting portion 11a and the convex portion 11c and the taper portion 10c of the large-diameter disk centering member 10 allows the spacer 11 to move up and down and a circle. It is a value that does not rotate in the circumferential direction, that is, about 0.05 to 0.40 mm. Also, the fitting part 11
The clearance between the outer peripheral side surface of b and the inner peripheral surface of the tapered portion 10c is a value that does not cause axial deviation of the spacer 11, that is, about 0.05 to 0.20 mm.

As shown in FIG.
Engaging portions 11d are respectively formed below the two fitting portions 11b. The engaging portion 11d has a slit for engaging with a part of the second leaf spring 12, and the rotational torque of the spacer 11 is biased from the leaf spring 12.

The second leaf spring 12 is a member for coupling the spacer 11 and the large-diameter disk centering member 10 so as to be vertically movable relative to each other. As shown in the perspective view of FIG. 3 (c), the leaf spring 12 is a thin plate for spring punched into a substantially annular shape.
Three tongue-shaped portions 12a are formed on the outer peripheral portion thereof at intervals of 120 degrees, and two sets of circumferential urging portions 12b are formed on the inner peripheral portion. The tongue-shaped portion 12a is formed by bending an arc-shaped leaf spring located on the outer peripheral portion at a right angle.
Is inserted into the slit of the engaging portion 11d. The circumferential urging portion 12b is bent at a right angle so that the rectangular leaf spring of the inner peripheral portion is parallel to the central axis, and the tip portion thereof is V-shaped. The circumferential biasing portion 12b is inserted into the hole 7d of the turntable base 7.

As shown in FIGS. 4 and 5, a third leaf spring 13 is coaxially attached to the upper portion of the turntable base 7. The third leaf spring 13 is a spring that biases the small-diameter disc centering member 14 upward, and is composed of an annular leaf spring, and its central opening is slightly bent in the axial direction.

A small-diameter disc centering member 1 is provided on the leaf spring 13.
4 is retained. The small-diameter disc centering member 14 is a member that comes into contact with the inner circumference of the center hole 3a of the disc 3 to center the disc 3. FIG. 11 shows a small-diameter disc centering member 1.
4 is a drawing showing the structure of FIG. 4, (a) is an end view along the central axis, (b) is an upper plan view, and (c) is a side view. As shown in FIGS. 11 (a) and 11 (c), the small-diameter disc centering member 14 has a tapered portion 14a protruding upward from the central axis.
Are formed. The tapered portion 14a has an outer shape smaller than the center hole 3a of the disk 3 at the tip end and larger than the center hole 3a at the root part. The small-diameter disc centering member 14 is held by the elastic force of the leaf spring 13 so as to be vertically movable with respect to the turntable base 7.

Next, FIG. 12 is a drawing showing the structure of the yoke 15, (a) is an end view along the central axis, (b) is an upper plan view, and (c) is a side view. The yoke 15 is shown in FIG.
As shown in (a) and (c), it is a plate-shaped metal having a flat bottom surface, the central portion of which is opened and a contact portion 15a which forms the magnetic path of the magnet 16 is formed. Abutment 1
Reference numeral 5a is a member that contacts a later-described clamp plate when the disc 1 is placed and contacts a center hub (also referred to as a clamping plate) 18 when the disc 3 is placed.

FIG. 13 is a drawing showing the shape of the magnet 16, (a) is an end view along the central axis, (b) is a plan view,
(C) is a side view. The magnet 16 gives an attractive force to the clamper 17 when the disc 1 is placed and an attractive force to the center hub 18 when the disc 3 is placed.

Next, the clamper 17 attached to the turntable device will be described. The clamper 17 includes a clamp plate 17a and a pressing portion 17b shown in FIG. The clamp plate 17a is a disk-shaped magnetic metal member whose central portion is pressed downward as shown in FIG. The pressing portion 17b is an annular member as shown in the end view of FIG. 15 (a) and the plan view of FIG. 15 (b). Is to press. As shown in FIGS. 1 and 4, the clamper 17 holds the mounting reference plane P1 from the upper surface of the disc 1 so that the mounting reference plane P1 is at a fixed position with respect to the optical pickup (not shown) when the disc 1 is mounted. Further, as shown in FIG. 5, the clamper 17 holds the mounting reference surface P2 of the disk 3 from the upper surface thereof so that the mounting reference surface P2 of the disk 3 is in a fixed position with respect to the optical pickup as shown in FIG.

A method of mounting the disc 1 in the turntable device constructed as described above will be described with reference to FIGS. When the disk 1 is placed on the spacer 11, the center hole 1a of the disk 1 comes into contact with the tapered portion 10c of the large-diameter disk centering member 10, and the disk 1 is centered in the turntable device.

That is, the large-diameter disc centering member 10 is arranged coaxially with the turntable base 7 and supported by a bearing 8. As shown in FIG. 3D, the leaf spring 9 holds the annular portion 10b of the large-diameter disc centering member 10 at the same height as the inner peripheral portion 9a of the leaf spring 9. Therefore, as shown in FIG. 1 or 4, the large-diameter disc centering member 10 is inserted into the center hole 1a of the disc 1 without being pressed downwardly of the central axis.

Next, the spacer 11 is pressed upward by the leaf spring 12. Therefore, the upper surface of the disk mounting portion 11a shown in FIG. 3 (a) contacts the mounting reference plane P1 of the disk 1. At this time, as shown in FIG.
The lower surface of the disk rests on the small-diameter disk mounting portion 7b, and the information recording surface of the disk 1 is positioned. Thus, the spacer 11 adjusts the difference between the height of the disc 1 to the mounting reference plane P1 and the height of the disc 3 from the information signal recording surface to the mounting reference plane P2.

The mounted disk 1 is fixed by the clamper 17 descending onto the turntable device. Since the clamper 17 is made of a magnetic material,
The magnet 16 and the yoke 15 arranged coaxially with the turntable base 7 attract the central portion thereof. Then, the disk 1 is pressed by the pressing portion 17b and fixed on the turntable device.

Next, when the disk cartridge 2 is mounted on the turntable device as shown in FIGS. 2 and 5, the shell 4 of the disk cartridge 2 is mounted on the chassis 6 by a loading mechanism (not shown).
It is mounted and positioned on top. Then, the turntable base 7 is fitted into the opening 4a of the cartridge 4. The mounting reference plane P2 of the disk 3 first contacts the tip of the taper portion 10c of the large-diameter disk centering member 10. Therefore, the large-diameter disc centering member 10 is pushed down. The large-diameter disc centering member 10 is connected to the bearing 8 via a leaf spring 9, and the leaf spring 9 is also elastically supported so as to be displaceable in the central axis direction with respect to the large-diameter disc centering member 10. Further, the bearing 8 has a large-diameter disk centering member 10 with respect to the central axis of the turntable base 7.
Is rotatably supported.

As shown by the alternate long and short dash line in FIG. 3, the guide hole 10d of the large-diameter disc centering member 10 is fitted in the inclined guide 7c of the turntable base 7. Therefore, when the tip of the large-diameter disc centering member 10 is pushed down, it first descends along the vertical surface of the inclined guide 7c. After that, the large-diameter disk centering member 10 descends while rotating along the inclined portion of the inclined guide 7c. At this time, the spacer 11
Is engaged with the large-diameter disk centering member 10 through the guide hole 10d so as to be vertically movable, and when the large-diameter disk centering member 10 rotates, the small-diameter disk mounting portion 7b of the turntable base 7 is
Rotate together on.

Further, since the spacer 11 is elastically coupled to the large-diameter disc centering member 10 by the leaf spring 12 in the axial direction, the disc mounting portion 11a extends to the spacer retracting portion 7a of the turntable base 7. After the rotation, the large-diameter disc centering member 10 is housed in the spacer retracting portion 7a so as to descend and be pulled out. Then, the large-diameter disc centering member 10 descends below the small-diameter disc mounting portion 7b of the turntable base 7, and the spacer 11 descends and retreats into the spacer retreat portion 7a. As a result, the disc 3 is placed on the small-diameter disc mounting portion 7b. Then, the center hub 18 of the disk 3 in FIG. 5 is attracted to the magnet 16 and the yoke 15, and the disk 3 is fixed.

On the other hand, when the disc 3 is removed from the turntable device, the large-diameter disc centering member 10 and the spacer 11 cause the upward restoring force of the leaf spring 9 and the circumferential urging portion 12b of the leaf spring 12. It returns to the initial position due to the restoring force.

In this way, the disc 3 and the disc 1 in which the mounting reference planes P1 and P2 have different heights can be mounted on the turntable with the information signal recording surfaces having the same height. By doing so, the heights of the information signal recording surfaces become the same, and the laser beam focusing positions of the optical pickup (not shown) that also serves as the disk 1 and the disk 3 can be made the same. Therefore, the optical pickup can be easily installed on the turntable device.

Further, the disc cartridge 2 and the disc 1
No special operation is required when mounting each of them, and it suffices to mount the disc. Also disk 3 and disk 1
In order to absorb the height difference between the mounting reference planes P2 and P1 of
Since the disc mounting portion 11a is mounted on the small-diameter disc mounting portion 7b, only the thickness dimension of the disc mounting portion 11a needs to be accurately managed, and variations due to the accumulation of tolerances of other components do not occur. Absent.

A clamper 1 for pressing and fixing the disk 1
Since the magnetic attraction portion is provided in the center portion of 7, the number of parts of the clamp mechanism can be reduced without providing a dedicated mechanism for fixing the clamper 17 when mounting the disk 1.

[0038]

As described above, according to the present invention, when the first disk is placed, the large-diameter disk centering member is used for centering and the spacer is used for axial positioning.
When mounting the second disk, the small-diameter disk centering member is used for centering. At this time, the spacer is housed in the retracting portion of the turntable base and placed on the small-diameter disc mounting portion of the turntable base. In this way, the same disc drive device can be used to reproduce or record the first and second discs.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a disk is placed in a turntable device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a disc cartridge is placed in the turntable device of this embodiment.

FIG. 3 is an exploded perspective view showing a configuration of a main part of the turntable device according to the present embodiment.

FIG. 4 is an enlarged view (No. 1) showing a configuration of a main part of the turntable device according to the present embodiment.

FIG. 5 is an enlarged view (No. 2) showing the configuration of the main part of the turntable device according to the present embodiment.

FIG. 6 is a diagram showing a configuration of a turntable base in the turntable device of the present embodiment.

FIG. 7 is a diagram showing a configuration of a bearing in the turntable device of the present embodiment.

FIG. 8 is a diagram showing a configuration of a first leaf spring in the turntable device of this embodiment.

FIG. 9 is a diagram showing a configuration of a large-diameter disk centering member in the turntable device of this embodiment.

FIG. 10 is a diagram showing a configuration of a spacer in the turntable device of the present embodiment.

FIG. 11 is a diagram showing a configuration of a small-diameter disc centering member in the turntable device of this embodiment.

FIG. 12 is a diagram showing a configuration of a yoke in the turntable device of the present embodiment.

FIG. 13 is a diagram showing a configuration of a magnet in the turntable device according to the present embodiment.

FIG. 14 is a diagram showing a configuration of a clamp plate in the turntable device of the present embodiment.

FIG. 15 is a diagram showing a configuration of a pressing portion in the turntable device of this embodiment.

FIG. 16 is a plan view showing an engaged state of a turntable base, a large-diameter disc centering member, and a spacer in the turntable device of this embodiment.

[Explanation of symbols]

 1 1st disk 1a, 3a center hole 2 disk cartridge 3 2nd disk 4 shell 4a opening 5 drive motor 5a output shaft 6 chassis 7 turntable base 7a spacer retreat part 7b small-diameter disk mounting part 7c tilt guide 7d hole 8 Bearing 8a Outer peripheral groove 9,12,13 Leaf spring 9a Inner peripheral portion 9b Outer peripheral portion 9c Spring portion 10 Large diameter disc centering member 10a Cylindrical portion 10b Annular portion 10c, 14a Tapered portion 10d Guide hole 10e Circular groove 11 Spacer 11a Disc mounting portion 11b Fitting portion 11c Convex portion 11d Engaging portion 12a Tongue-shaped portion 12b Circumferential biasing portion 14 Small-diameter disc centering member 15 Yoke 15a Abutting portion 16 Magnet 17 Clamper 17a Clamp plate 17b Pressing portion 18 Center hub P1, P2 Placement reference plane

Claims (4)

[Claims] 1. A turntable device for use in a disc drive device for reproducing and recording signals by mounting a large-diameter first disc or a small-diameter second disc held in a disc cartridge. A cylindrical portion attached to the output shaft of the motor, a mounting portion for the disk-shaped second disk centering on the rotation shaft, and a portion of the mounting portion cut out at equal intervals in the circumferential direction A turntable base integrally formed with a spacer retracting portion and a tilting guide having a tilted surface formed at a lower portion of the mounting portion, and a rotation direction of the turntable base in a cylindrical portion via a first leaf spring. An annular portion that is finely held in the rotational axis direction and has an opening at the center; a taper portion that projects from the annular portion in the rotational axis direction and that fits into the opening of the first disk;
And a large-diameter disc centering member integrally formed with guide holes in which a part of the annular portion is cut out at equal intervals along the circumferential direction, and a second leaf spring on the turntable base. Are engaged with each other and are finely held in the upper part of the turntable base in the rotational axis direction and the rotational direction, respectively, and have a flat plate-shaped disk mounting portion centering on the rotational shaft, and the disk mounting portion in a circumferential direction. A recessed fitting portion provided adjacent to each other, and a spacer vertically formed in a lower portion of the disc mounting portion and having an engaging portion that engages with the second leaf spring, When mounting the first disk, the disk mounting portion of the spacer is overlapped on the second disk mounting portion of the turntable base so that the opening of the first disk is the large-diameter disk centering member. The center is defined by engaging the tapered part of When the second disk is placed, the taper portion of the large-diameter disk centering member is pushed back by the inner peripheral surface of the second disk to retreat, and the spacer is moved by the elastic force of the second leaf spring. The disc mounting portion is housed in the spacer retracting portion by rotating the engaging portion of the disc along the inclined surface of the inclination guide of the turntable base, and the second disc is mounted on the turntable base. A turntable device characterized by being held on a table. 2. A turntable device used in a disc drive device for reproducing and recording signals by mounting a large-diameter first disc or a small-diameter second disc held in a disc cartridge. A cylindrical portion attached to the output shaft of the motor, a mounting portion for the disk-shaped second disk centering on the rotation shaft, and a portion of the mounting portion cut out at equal intervals in the circumferential direction A turntable base integrally formed with a spacer retracting portion and a tilting guide having a tilted surface formed at a lower portion of the mounting portion, and a rotation direction of the turntable base in a cylindrical portion via a first leaf spring. An annular portion that is finely held in the rotational axis direction and has an opening at the center; a taper portion that projects from the annular portion in the rotational axis direction and that fits into the opening of the first disk;
And a large-diameter disc centering member integrally formed with guide holes, each of which is formed by cutting out a part of the annular portion at equal intervals along the circumferential direction, and a third spring attached to the turntable base. And a small-diameter disc centering member that is held so as to be able to move in the direction of the rotation axis through the shaft and that has a second taper portion that forms a part of a conical surface upward so as to fit with the opening of the second disc. When mounting the first disc, the disc mounting portion of the spacer overlaps the second disc mounting portion of the turntable base so that the opening of the first disc is the large-diameter disc. The center of the centering member is defined by engaging the taper portion of the centering member, and when the second disk is placed, the taper portion of the small-diameter disk centering member performs centering of the second disk, Large-diameter disc centering member The retracting portion is pushed back by the inner peripheral surface of the second disc, and the engaging portion of the spacer is moved along the inclined surface of the inclined guide of the turntable base by the elastic force of the second leaf spring. The turntable device, wherein the disc mounting portion is housed in the spacer retracting portion by rotating, and holds the second disc on the disc mounting portion of the turntable base. 3. A first leaf spring connecting the large-diameter disc centering member and the turntable base includes an inner peripheral portion attached to a cylindrical portion of the turntable base, and a large-diameter disc centering member. The turntable base and the spacer are formed by integrally forming an outer peripheral part attached to the annular part, and a spiral spring part connecting the inner peripheral part and the outer peripheral part with elastic plate materials. The second leaf spring to be connected elastically forms a plurality of tongue-shaped portions that engage with the engaging portion of the spacer and a plurality of arm-shaped circumferential biasing portions whose one end is fixed to the turntable base. 3. The turntable device according to claim 1 or 2, wherein the turntable device is integrally formed of a plate material having a groove. 4. A dish-shaped yoke mounted on the turntable base side and a magnetism generating means provided with an annular magnet on an inner surface of the yoke, respectively, and when mounting the first and second disks. A clamper is provided at a position facing the magnetism generating means with the first or second disk interposed therebetween and presses a shell of the first disk or the second disk. The turntable device according to item 1, 2, or 3.