JPH08306107A - Disk recording and reproducing device - Google Patents

Abstract

PURPOSE: To enable even such disks to be mounted on a turntable that a supporting diameter of one disk is larger than a diameter of a turntable inserting hole formed in a cartridge case of the other disk of a cartridge housing type and hence to make the device versatile. CONSTITUTION: A clamper 3 and a subturntable 4 are equipped on a cartridge case capable of opening up and closing down so as to be freely rotatable in a case lid 10 and a case main body respectively. A disk 1 is loaded into this cartridge case, and under the state of closing the cartridge case, the disk is held on the upper and lower sides between the clamper 3 and the turntable 4. Now, when a turntable 20 is inserted into an opening provided in the center of the lower surface of the cartridge, a hub is magnetically attracted to a magnet 22, and a spindle 23 is inserted into a center hole to position the disk in its diametral direction. Then, the lower surface of the disk is brought into contact with the top surface of a supporting part of the table 20 to be engaged with each other to position the spindle in its axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for a disc-shaped information medium, and more particularly to a disc recording / reproducing apparatus capable of loading different types of disc media at recording / reproducing positions and rotating the disc media. It is about.

[0002]

2. Description of the Related Art Conventionally, when a disc-shaped recording medium (hereinafter referred to as a disc) is loaded into a drive unit of a disc recording / reproducing apparatus, there are two methods for mounting the disc on a turntable, a magnetic clamp system and a mechanical clamp system. Streets are usually adopted.

A conventional disk clamp mechanism in the mechanical clamp system has a structure as shown in FIG. 5, for example. Here, reference numeral 101 is a disk, 10
2 is a center hole provided in the disk 101, 150 is a spindle for rotating the disk, 151 is a turntable for mounting and rotating the disk, and 152 is a slideable up and down along the spindle 150. A taper cone for centering the disk on the turntable 151, a compression coil spring 153 for urging the taper cone 152 upward in the drawing, and a disk pressing member 154 for pressing the disk from above. Further, the disk holding member 154 has a magnet 155 for magnetically attracting the disk to the turntable 151 side.
Is stuck.

In the disc clamp mechanism thus constructed, the taper cone 1 is provided in the center hole 102 of the disc.
52 is inserted, the peripheral portion of the tapered cone 152 is fitted and abutted on the center hole 102 of the disk, and centering is performed. Further, in this state, the disc 101 is fixed to the turntable 151 by the disc pressing member 154 by the attraction force between the magnet 155 and the turntable 151.

Further, as a disk clamp mechanism in the conventional magnet clamp system, for example, a structure shown in FIG. 6 is known. Here, reference numeral 1
11 is a disk, 112 is a hub made of a magnetic material, 11
Reference numeral 3 is a magnet for magnetically attracting the hub 112 to the turntable.

In the disk clamp mechanism configured as described above, the spindle 150 is inserted into the center hole 113 of the hub to perform centering, and in that state, the magnet 1
Due to the attraction force between the hub 57 and the hub 57, the disk 11
1 is fixed to the turntable 156.

Further, a general-purpose disc clamping mechanism capable of placing and clamping different discs applied to the above-mentioned two types of clamping systems on the same turntable is shown in FIG. 7, for example. As described in JP-A-6-
There is one disclosed in the publication No. 150504.

In this conventional example, a taper cone for centering a disk having no hub (see FIG. 7A) and a centering disk having a hub (see FIG. 7B) are used. The spindle for performing is provided coaxially,
It is possible to selectively mount and drive each disk on the same spindle or turntable using magnetic force.

As such a versatile disc clamp mechanism, as shown in FIG. 8, there is another disc clamp mechanism described in Registered Utility Model Publication No. 3004098. Here, by providing two disc supporting surfaces having different heights on the same turntable, discs having different clamping areas can be clamped on the same turntable.

[0010]

However, even when the disc clamping mechanism as shown in FIGS. 7 and 8 is provided, the disc supporting position is changed, particularly as in the case of FIG. If the discs differ in the radial direction, there are the following problems regardless of which clamping method is used. That is, in the disc clamp mechanism for a disc loaded in advance in the cartridge, if the size of the turntable insertion hole provided in the cartridge corresponding to the small support diameter of the disc is small, the turntable insertion is performed. If the support diameter of the other handled disk is larger than the hole, the turntable side support that supports at this large support diameter spatially interferes with the cartridge case to turn the cartridge storage type disk. It becomes impossible to support the table.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and the support diameter of one disk is larger than the diameter of the turntable insertion hole formed in the cartridge case of the other cartridge-containing disk. Even in this case, it is an object of the present invention to provide a versatile disc recording / reproducing apparatus equipped with a disc clamp mechanism capable of mounting both discs on a turntable.

[0012]

Therefore, in the present invention,
It is provided with a spindle that rotates at the center position of the disk loaded in the recording / reproducing position in the device and a turntable on which the disk is placed, and is configured to attract and hold the disk by a magnet provided on the turntable. In the disc recording / reproducing apparatus described above, the magnet is arranged so as to face the hub, with respect to the first disc having a hub made of a magnetic material around a center hole fitted to the spindle. The turntable is provided with a support portion that is in contact with the disk surface on the outer peripheral side of the hub. For a second disk having a center hole larger than the center hole, it is fitted in the center hole of the disk. And a attracting portion made of a magnetic material and facing the magnet. Par, and the mediate sub turntable mounted on the turntable with turned clamper paired sandwiching the disc, is configured to mount the disk on the turntable.

[0013]

With such a structure, even if the first disk is a cartridge storage type and the diameter of the turntable insertion opening formed in the cartridge case is smaller than the support diameter of the second disk, For any disc, it becomes possible to attach the disc to the turntable,
In that sense, versatility can be secured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to FIGS. 2 and 3
For example, such as ISO standard 3.5 inch MOD,
A disk clamp mechanism is shown as applied to a cartridge-stored disk. Here, a spindle 23 that rotates at the center position of a disc loaded in a recording / reproducing position in the apparatus and a turntable 20 on which the disc is placed are provided, and a magnet 22 provided on the turntable 20 serves to It is configured to attract and hold a disc.

In this disc clamp mechanism, a first disc having a hub 31 made of a magnetic material around a center hole 33 fitted into the spindle 23, in this embodiment, a disc 32 housed in a cartridge case 30.
For the above, the magnet 22 described above is provided facing the hub 31.
In addition, the turntable 20 is provided with an annular support portion 25 that is in contact with the disk surface on the outer peripheral side of the hub 31.

Further, as shown in FIGS. 1 and 4, for the second disc 1 such as a compact disc having a central hole 1a larger than the central hole 33, the clamper 3 and the disc 1 paired therewith are used. The disc 1 is mounted on the turntable 20 via the sub-turntable 4 mounted on the turntable 20.

That is, the clamper 3 has a fitting holding portion 3c (in this embodiment, the outer periphery thereof has a tapered cone shape) fitted in the central hole 1a of the disk 1 and a center fitted in the spindle 23. It has a hole 3 b and an attracted portion 3 a facing the magnet 22 and made of a magnetic material.

The above-mentioned clamper 3 and sub-turntable 4 are rotatably mounted on an upper and lower part (case lid) 10 and a lower part (case body) 8 of a cartridge case which can be opened and closed vertically. The second disk 1 is loaded in the cartridge case, and the disk is sandwiched between the clamper 3 and the sub turntable 4 from above and below with the cartridge case closed.

More specifically, the support portion 25 is located on the outer peripheral side of the fitting and holding portion 3c, and the sub-turntable 4 is at the same level as the first disc 32 and the second disc 1 is. Is provided with an annular support portion 4b in contact with the disk surface of the second disk 1. In addition,
The sub-turntable 4 is removably fitted to the turntable in a state where the annular lower surface 4c is placed on the placing portion 21 formed on the outer periphery of the turntable 20. Further, the cartridge case 2 is provided with a facing opening portion 7 and a space portion 9 for accommodating the disc 1 in a lower portion 8 in a moving area of a pickup for recording / reproducing.

In such a structure, as shown in FIG. 3, when the turntable 20 is inserted into the opening provided at the center of the lower surface of the cartridge case 30, the hub 31 is magnetically attracted to the magnet 22. The center hole 33 is fitted into the spindle 23 to determine the radial position of the disk, and the lower surface of the first disk 32 abuts / engages with the top surface of the support portion 25 of the turntable 20. Then, the axial position of the spindle 23 is determined, and clamping is completed in this state.

In this case, the supporting portion 21 is formed in a position that does not interfere with the opening corresponding to the pickup head of the cartridge case 30 and the lower surface thereof, so that the above-mentioned disk 32 of the cartridge storage type is provided. The disc clamp mechanism of the present invention can be applied.

Further, as shown in FIG. 1, the second disc 1 is housed in the space 9 of the cartridge case 2 to close the upper portion 10, and at the same time, the fitting and holding portion 3c of the clamper 3 causes the center of the disc 1 to move. It is fitted into the hole 1a. On this occasion,
The upper portion 10 is kept in a closed state by a snap-fit holding member (not shown) provided on the lower portion 8. The disc 1 in this state, together with the cartridge case 2, is loaded into the disc recording / reproducing apparatus and, as shown in FIG. 4, is clamped to the turntable 20 via the clamper 3 and the sub-turntable 4.

That is, the lower portion 8 of the cartridge case 2
When the turntable 20 is inserted into the central opening portion provided in the magnet 2, the attracted portion 3b of the clamper 3 causes the magnet 2
2, the central hole 3a of the clamper 3 is fitted into the spindle 23. Further, the magnetic attraction causes the clamper 3 to slightly lower, so that the disk 1 comes into contact with the supporting surface 4b of the sub-turntable 4, and the center hole 4a is fitted to the outer periphery of the supporting portion 25 of the turntable 20, Further, the lower surface 4c comes into contact with the upper surface of the mounting portion 21 to complete the clamping.

At this time, the central hole 1a of the disk 1
Is fitted into the taper portion 3c of the clamper 3 positioned by the spindle 23, so that the radial position of the disk is lowered, and the lower surface 4c is placed via the disk 1 due to the slight lowering of the clamper 3. By being brought into contact with the mounting portion 21, the axial position of the spindle 23 is determined.

In such an embodiment, the mounting portion 21 provided on the turntable 20 is the turntable 20.
Although it is provided so as to project on the outer periphery of the above, it may be configured in a stepped shaft shape (convex). Further, it is also possible to form the mounting portion 21 not in an annular shape but intermittently in the circumferential direction, for example, by arranging it at at least three or more places.

[0026]

As described above, the present invention comprises the spindle rotating at the center position of the disk loaded in the recording / reproducing position in the apparatus and the turntable on which the disk is mounted, and the turntable. In the disk recording / reproducing apparatus configured to attract and hold the disk with the magnet provided in the above, for the first disk having a hub made of a magnetic material around the center hole fitted to the spindle, The magnet is arranged so as to face the hub, and the turntable is provided with a support portion that is in contact with the disk surface on the outer peripheral side of the hub and has a center hole larger than the center hole. For the disc, the fitting holding portion that fits in the center hole of the disc, the center hole that fits in the spindle, and the magnet face each other. And a attracted portion made of a magnetic material, and a sub-turntable mounted on the turntable for sandwiching the disc in a pair with the clamper and interposing the disc on the turntable. It is configured to be worn.

Therefore, even if the support diameter of one disk is larger than the diameter of the turntable insertion hole formed in the cartridge case of the other cartridge-containing disk, both disks can be mounted on the turntable. At the same time, the versatility that the height of the light beam incident side surface of the disc with respect to the optical pickup can be made constant in both mounted discs can be exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view for explaining a case where a disc clamp mechanism of the present invention is applied to a second disc.

FIG. 2 is a perspective view for explaining a case where the disc clamp mechanism of the present invention is applied to a first disc.

FIG. 3 is a side sectional view showing a state where the first disc is mounted on the disc clamp mechanism of the present invention.

FIG. 4 is a side sectional view showing a state where the second disc is accommodated in the cartridge case and mounted in the disc clamp mechanism of the present invention.

[Fig. 5] Disc using the conventional mechanical clamp system
It is sectional drawing which shows a clamp mechanism.

[Fig. 6] Disk using conventional magnet clamp method
It is sectional drawing which shows a clamp mechanism.

FIG. 7 is a cross-sectional view showing a state where two types of clamp type discs are clamped by the same disc clamp mechanism.

FIG. 8 is a cross-sectional view showing a state in which two types of clamping methods are used, in particular, discs having different clamping areas are clamped by the same disc clamping mechanism.

[Explanation of symbols]

 1 Second Disc 1a (Second Disc) Center Hole 2 Cartridge Case 3 Clamper 3a Clamper Center Hole 3b Adsorbed Part 3c Fitting Hold Part 4 Sub Turntable 4a (Sub Turntable) Center Hole 4b Disc Support Surface 4c Lower surface 5 Holding part for clamper 6 Holding part for sub turntable 7 Opening part 8 Lower part 9 Space part 10 Upper part 20 Turntable 21 Mounting part 22 Magnet 23 Spindle 25 Support part 30 Cartridge 31 Hub 32 First Disc 33 (first disc) center hole

Claims (5)

[Claims] 1. A spindle, which rotates at a central position of a disc loaded in a recording / reproducing position in an apparatus, and a turntable on which the disc is mounted, are provided, and the disc is attracted by a magnet provided on the turntable.
In the disc recording / reproducing apparatus configured to hold the magnet, the magnet is arranged facing the hub for a first disc having a hub made of a magnetic material around a center hole fitted to the spindle. In addition, the turntable is provided with a support portion in contact with the disc surface on the outer peripheral side of the hub, and for the second disc having a central hole larger than the central hole, A clamper having a fitting and holding portion that fits in a center hole, a center hole that fits in the spindle, and a portion to be attracted made of a magnetic material that faces the magnet, and holds the disc in a pair with the clamper. And is configured to mount the disc on the turntable through a sub-turntable mounted on the turntable. Disk recording and reproducing apparatus characterized by there. 2. The supporting portion is located on the outer peripheral side of the fitting holding portion, and the sub-turntable holds the second disc at the same level as the first disc.
The disc recording / reproducing apparatus according to claim 1, further comprising a support portion that is in contact with a disc surface of the second disc. 3. The clamper and the sub-turntable are rotatably mounted on an upper part and a lower part of a cartridge case which can be opened and closed vertically, respectively. With the disc loaded and the cartridge case closed,
The disc recording / reproducing apparatus according to claim 1, wherein the disc is sandwiched from above and below. 4. The disk recording / reproducing apparatus according to claim 3, wherein the cartridge case is provided with openings facing each other in a moving area of a pickup for recording / reproducing. 5. The fitting support portion of the clamper has a tapered cone-shaped outer peripheral surface.
The disk recording / reproducing apparatus according to any one of items 1 to 4.