JPH09320165A - Disk-supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a device capable of stably supporting a disk by inclinedly arranging plural cam members, formed with cam grooves for inserting the peripheral edges of plural disks. SOLUTION: Rotary shafts (A) of plural screw poles 21 functioning as cam members are arranged, to be inclined at a prescribed angle with respect to an axis (V) vertical to a chassis. Consequently, screw threads 31 for supporting the outer peripheral parts on the disk-recording surfaces and the screw bottoms 32 as the helical cam grooves for inserting the peripheral edges of disks are supported in parallel with respect to the chassis and formed to be almost parallel to the disks 3-6. So, the disks 3-6 are stably supported by the plural screw poles 21. By engaging a driving gear 27, rotationally driven by a rotation driving mechanism consisting of a motor, etc., with helical gears 24, respectively formed on the plural screw poles 21, the plural screw poles 21 are synchronously driven for rotation to move the plural disks 3-6 in the direction of the rotary shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc supporting device for coaxially supporting a plurality of discs at a storage position in a changer type disc reproducing device.

[0002]

2. Description of the Related Art In a changer type disc reproducing apparatus capable of accommodating a plurality of discs so that their rotation axes are coaxial, when reproducing a selected disc among a plurality of discs accommodated in a disc accommodating position. By moving a reproducing mechanism such as an optical pickup or a clamper between the selected disc and another disc adjacent to the selected disc, a disc reproducing device that can reproduce the selected disc without pulling it from the storage position is a special feature. Kaihei 3-
No. 176,852 and Japanese Patent Publication No. 8-10522.

Here, at the time of reproducing a disc, an optical pickup or a turntable is provided between the disc to be reproduced and an adjacent disc facing the recording surface of the disc, and the disc to be reproduced and the label surface of the disc. Since it is necessary to position the clamper between the adjacent disks facing each other, it is necessary to move the plurality of disks at the disk storage positions in the vertical direction with respect to their recording surfaces.

For this reason, the above-mentioned Japanese Patent Laid-Open No. 3-176852.
In the issue, each tray for mounting the disc is provided, and a motor is provided for each of the four trays.
This controls the vertical movement of the disc. Also,
Similarly, in Japanese Examined Patent Publication No. 8-10522, trays are provided and the movement of five trays is controlled by a cam.
In any case, a space is provided on both sides of the disc to be played back, so that an optical pickup, a clamper, etc. can be moved into this space, and discs that are not played back are brought into close contact with each other, so that the disc The miniaturization of the device in the direction perpendicular to the recording surface is achieved.

However, the thickness of the tray on which the discs are placed cannot be neglected in order to reduce the size of the device in the direction perpendicular to the recording surface of the discs. There is a demand to support in. In this regard, Japanese Patent Publication No. 2-48978 discloses a disk supporting device in which a plurality of screw rods are provided and the peripheral edge of the disc is supported in a valley formed on the outer periphery of the screw rods.

[0006]

However, since such a screw rod is erected perpendicularly to the recording surface of the disc, the peripheral edge of the disc in the horizontal state is supported by the valley of the spiral screw rod. . Therefore, the fitting between the disk peripheral edge and the screw trough becomes shallow, and the disk cannot be stably supported.

[0007]

As a means for solving the above problems, the present invention inserts the peripheral edges of a plurality of discs into a spiral cam groove formed on the outer periphery of the discs to form a plurality of discs. A plurality of cams that support a plurality of discs such that the rotation shafts of the discs are coaxial, and that the rotation shafts are inclined with respect to the rotation shafts of the discs so that the cam grooves into which the peripheral edges of the discs are inserted are substantially parallel. And a rotary drive mechanism for rotating the cam member.

[0008]

By rotating the cam member by the rotary drive mechanism, the disc inserted in the cam groove is moved in the direction of its rotation axis.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a changer type disk reproducing apparatus capable of storing five disks will be described below.

FIG. 1 is a top view showing a state where the first disc 2 among the five discs 2 to 6 housed in the disc reproducing apparatus 1 is being reproduced, and FIG. 2 is a side view thereof. The disc 2 being reproduced is clamped by a turntable 7 arranged on the recording surface side and a clamper 8 arranged on the label surface side facing the disc, and is rotated by a spindle motor 9 which rotationally drives the turntable 7. .

The clamper 8 is rotatably supported at one end of a clamp arm 10, and the other end is pivotally supported by a shaft 11. Two guide rails 13 are arranged on a pickup arm 12 to which the spindle motor 9 is fixedly arranged, and an optical pickup 14 is movably arranged along the guide rails 13. The other end of the pickup arm 12 is also supported by the shaft 11.

To rotate the clamp arm 10 and the pickup arm 12, an arm rotating mechanism 15 including a motor is provided. Further, an arm moving mechanism 16 is provided for driving the clamp arm 10 and the pickup arm 12 so as to approach or separate from each other while keeping the parallel state.

The peripheral edges of the second to fifth discs 3 to 6 are inclined with respect to the chassis (not shown) and are formed on the outer circumference of the three screw rods 21 to 23 constituting the first screw rod group. It is supported by the screw trough. Here, the screw rods 21 to
23 is rotatably supported with respect to the chassis, and the helical gears 24 to 26 formed on the respective units are meshed with a drive gear 27 that is supported by the chassis. The drive gear 27 is rotationally driven in both forward and reverse directions by a required rotary drive mechanism 28 including a motor and the like. Here, the screw rods 21 to 23 function as a cam member in the present invention.

FIG. 3 is an enlarged view of the screw rod 21. The axis of rotation A of the screw rod 21 is inclined by 7 degrees with respect to a line V perpendicular to the chassis in the tangential direction of the outer circumference of the disk. Therefore, the screw thread 3 for supporting the outer peripheral portion of the disk recording surface
1 and the disk peripheral edge are inserted, and the screw trough 32 functioning as a cam groove is substantially parallel to the disk supported in parallel to the chassis, so that the disk can be stably supported. The screw rods 22 and 23 are also the screw rods 2.
1 and has the same rotation axis as the tangential direction of the outer circumference of the disk, the detailed description thereof will be omitted. With this configuration, the helical gear 24
~ 26 by engaging the drive gear 27, the screw rod 21
23 can be rotationally driven in synchronization.

The above-mentioned screw rods 21 to 23 and the helical gear 24 to
26, the drive gear 27, and the rotation drive mechanism 29. The disk 2 that is being reproduced by the screw rods 41 to 43, the helical gears 44 to 46, the drive gear 47, and the rotation drive mechanism 48 that constitute the second screw rod group having the same configuration. It is placed in a position that is sandwiched between. Similarly to the above description, the screw rods 41 to 43 are rotatably supported by the chassis in a state of being inclined by 7 degrees in the tangential direction of the outer circumference of the disc, so that the screw threads and the screw troughs of the portion facing the disc are disc-shaped. Is almost parallel to.

In order to move the disk supported by the screw rods 21 to 23 to the reproduction position shown in FIG. 2 and the position supported by the screw rods 41 to 43 through the reproduction position, a third screw rod group is formed. The constituent screw rods 51 to 53 are provided. These screw rods 51 to 53 are also screw rods 21 to 23.
The screw rods 51 to 53 are movable with respect to the chassis. In the disc playback state of FIGS. 1 and 2, the disc is brought to the position indicated by the solid line that does not engage with the disc, but when the disc moves up and down, it moves to the position indicated by the broken line in FIG.
Engage the disc.

At the position of the broken line, the screw rods 51 to 51
The screw bars 51 to 53 are rotationally driven by meshing the helical gears 54 to 56 respectively provided on 53 with a drive gear 57 which is rotationally driven in both forward and reverse directions by a rotational drive mechanism 58 including a motor or the like. . Further, similarly to the above, the rotation axes of the screw rods 51 to 53 are also inclined by 7 degrees in the tangential direction of the outer periphery of the disc 2 at the reproduction position, and the screw threads and the valleys of the portion facing the disc are with respect to the disc 2. It is almost parallel.

The disc transfer mechanism 60 for loading / ejecting the disc at the reproducing position with respect to the apparatus 1 is composed of a pair of upper and lower parts which are formed so as to come into contact with the peripheral portions of the recording surface of the disc and the label surface facing the recording surface. It is composed of guide plates 61 and 62 and an endless drive belt 63 arranged so as to be held by the guide plates. The disk transfer mechanism 60 can be moved in parallel in the direction of arrow AB in the figure by a required moving mechanism 67 such as a motor.

The drive belt 63 is stretched between a drive pulley 64 and a driven pulley 65, and the drive pulley 64 is rotationally driven by a pulley drive mechanism 66 composed of a motor or the like. On the other hand, a disc guide mechanism 70 is arranged to hold the disc between it and the disc transfer mechanism 60. The disc guide 70 mechanism is arranged so as to be held by a pair of upper and lower guide plates 71 and 72 formed so as to contact the peripheral portions of the recording surface of the disc and the label surface facing the disc, and the disc peripheral edge. Is formed of a guide wall 73 that abuts against.

The disk guide mechanism 70 can be moved in the directions of arrows AB in FIG. 1 by a required moving mechanism 74 such as a motor. With this configuration, the disc is held between the drive belt 63 and the guide wall 73, and the disc is transferred in the direction of arrow CD which is orthogonal to the direction of arrow AB.

The front panel 80 of the apparatus 1 is formed with a slit-shaped opening 81 for loading and unloading the disk, and the disk is ejected and loaded from the apparatus 1 through the slit 81.

The operation of the above configuration will be described.
1 and 2, which are a top view and a side view showing a state in which the disc 2 is being reproduced, the disc 2 is formed by a turntable 7 located on the recording surface side and a clamper 8 located on the label surface side. The spindle motor 9 which is clamped and rotationally drives the turntable 7 is rotated at a required rotation speed. The optical pickup 14 is movable in the radial direction of the disc 2 along a guide rail 13 provided on the pickup arm 12.
The information recorded on the disk 2 is reproduced by irradiating a laser beam on the disk.

Here, in the reproduction state of the disc 2,
Although the disk 2 completely overlaps with the adjacent disk 3 in a plane, the distance between the disks 2 and 3 is larger than the distance between the disks 3 and 4 as shown in FIG. Contact between the disks 2 and 3 due to surface wobbling of the disk 2 during rotation is prevented.

When ejecting the disk 2, the disk transfer mechanism 60 is moved in parallel by the moving mechanisms 67 and 74 in the direction of arrow A and the disk guide mechanism 70 is moved in the direction of arrow B in FIG. It is held by the guide wall 73. After that, the arm driving mechanism 16 moves the clamp arm 10 and the pickup arm 12 in a direction in which they are separated from each other to release the clamp of the disk 2, and then the arm rotation mechanism 15 centers the clamp arm 10 and the pickup arm 12 around the shaft 11. The clamp arm 10 and the pickup arm 12 are moved counterclockwise in FIG. 1 to a position where they do not overlap the disc 2.

Subsequently, the drive pulley is rotated clockwise by the pulley drive mechanism 66 in FIG.
1 while rotating the disc 2 counterclockwise by means of FIG.
In the direction of arrow D in FIG. 1, the disk 2 can be taken out from the slit 81 formed in the front panel 80 to the eject position where about half of the disk 2 is exposed. FIG. 4 is a top view showing the ejected state of the disc 2.

During this transfer, the peripheral edge of the disk 2 is supported by the upper and lower guide plates 61 and 62 provided in the disk transfer mechanism 60 and the upper and lower guide plates 71 and 72 provided in the disk guide mechanism 70, and transferred. The posture of the disk 2 inside is prevented from becoming unstable.

When the disc in the reproducing state is replaced with the disc 2 from the disc 4, the screw rods 51 to 53 are moved from the positions shown by the solid lines to the positions shown by the broken lines in FIG. After being supported by 2, the clamp arm 10 and the pickup arm 12 are moved by the arm driving mechanism 16 in a direction in which they are separated from each other to release the clamp of the disc 2. After that, the arm rotation mechanism 15
Thus, the clamp arm 10 and the pickup arm 12 are rotated about the shaft 11 in the counterclockwise direction in FIG. 1, and the clamp arm 10 and the pickup arm 12 are moved to a position where they do not overlap the disc 2. This state is shown in FIGS. 5 and 6 which are a top view and a side view.

Subsequently, the drive gear 57 is rotated counterclockwise by the rotary drive mechanism 58, and the disks 2 and 3 are moved upward by the clockwise rotation of the screw rods 51 to 53, so that the disc 2 becomes the screw rods 51 to 53. It moves from the fitted state to the position where it fits into the screw rods 41 to 43.
In this state, the disc 3 is brought to the position of the disc 2 shown in FIG. 6, that is, the reproducing position.

Subsequently, as the drive gear 47 is rotated counterclockwise by the rotary drive mechanism 48, the screw rods 41 to 43 rotate clockwise to move the disk 2 further upward, and at the same time, the drive gear by the rotary drive mechanism 58. With the counterclockwise rotation of 57, the screw rods 51 to 53 rotate clockwise, and the disk 3 is moved from the state of being fitted with the screw rods 51 to 53 to the position of being fitted with the screw rods 41 to 43. . Furthermore,
As the drive gear 27 rotates counterclockwise by the rotary drive mechanism 28, the screw rods 21 to 23 rotate clockwise, and the disc 4 is fitted into the screw rods 21 to 23. Move to the mating position.

Further, the drive gear 57 by the rotary drive mechanism 58
The screw rods 51 to 53 rotate clockwise in accordance with the counterclockwise rotation of the disk 4 to move the disk 4 to the reproducing position. FIG. 7 shows a state where the disc 4 is moved to the reproduction position.

When the disc 2 supported by the screw rods 41 to 43 is reproduced again, it is sufficient to move the disc 2 to the reproducing position by the operation reverse to the above, and in this case, the screw rod 21. ~ 23, 41-43 and 51-53
Is driven to rotate in the opposite direction by the rotary drive mechanisms 28, 48 and 58.

The threaded rods 21 to 23 in the above embodiment,
41 to 43 and 51 to 53 are arranged at an angle of 7 degrees with respect to the chassis, but this angle changes depending on the thickness of the screw rod, the pitch of the screw thread, etc. It is changed accordingly. Also, the screw rods 21 to
23 is only required to have a spiral cam groove formed on its outer peripheral surface, and its shape can be appropriately changed.

Further, in the above embodiment, the disc was moved by the drive belt 63 from the reproduction position to the eject position, but the present invention is not limited to this, and for example, a pair of discs holding the recording surface and the label surface of the disc may be used. It is also possible to transfer by means of rollers, and various modes can be adopted.

[0034]

As described above, according to the present invention, the disk can be directly supported by the screw rod, and at this time, the disk can be stably supported, the number of parts is small, and the cost is reduced. It is possible to provide an excellent disk support device.

[Brief description of drawings]

FIG. 1 is a top view showing a state where a disc 2 is being reproduced.

FIG. 2 is a side view of FIG.

FIG. 3 is an enlarged view of a screw rod 21.

FIG. 4 is a top view showing an ejected state of the disc 2.

FIG. 5 is a top view showing a state where the clamp of the disc 2 is released and the clamp arm 10 and the pickup arm 12 are moved to a position where they do not overlap the disc 2.

FIG. 6 is a side view in the state of FIG.

FIG. 7 is a side view showing a state where the disc 4 is brought to a reproduction position.

[Explanation of symbols]

 1 Disc Playback Device 2-6 Disc 7 Turntable 8 Clamper 10 Clamp Arm 12 Pickup Arm 14 Optical Pickup 21-23 Screw Rod 41-43 Screw Rod 51-53 Screw Rod 60 Disk Transfer Mechanism 70 Disk Guide Mechanism

Claims (1)

[Claims] 1. The plurality of disks are supported by inserting the peripheral edges of the plurality of disks into a cam groove spirally formed on the outer periphery thereof so that the plurality of disks have coaxial rotation axes. A plurality of cam members whose rotation axes are arranged to be inclined with respect to the rotation axis of the disc so that the cam grooves inserted into the peripheral edge of the disc are substantially parallel to each other; A disk support device comprising a rotary drive mechanism for rotating the cam member to move.