JPH1040634A - Disk reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device without needing any complex moving mechanisms by rotating a hold screw and moving away the holding screw from a disk loaded in a disk reproducing means. SOLUTION: First, upper hold screws 20B and 20C are rotary-driven by driving mechanisms and, when a disk D3 is aligned in a reproducing position, the upper disks D3 to D5 are supported by the locking guides 21B and 21C of the upper hold screws 20B and 20C and disks D1 and D2 positioned in the lower side of the reproducing disk D3 are supported by the locking guides 31B and 31C of lower hold screws 30B and 30C. When the disk D3 instructed for reproduction is carried to a reproducing position, an insertion space for a disk reproducing mechanism 200 is formed between the reproducing disk D3 and the disk D2. Then, the disk D3 is clamped on a turntable 40 and thus recording information is read by an optical head.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc reproducing apparatus, and more particularly to a hold screw for directly supporting the periphery of a disc with a spiral guide and moving the supported disc in a direction perpendicular to the disc surface with the rotation. The present invention relates to a disk reproducing device provided with the same.

[0002]

2. Description of the Related Art The present applicant has previously disclosed a changer provided with a hold screw for directly supporting the peripheral edge of a disk by a spiral guide and moving the supported disk in a direction perpendicular to the disk surface with the rotation. Japanese Patent Application Nos. 8-157706 and 157707 propose a compact disk reproducing apparatus on May 28, 1996.

[0003] The disk device 3 described in such a patent application
14 supports the peripheral edge of the storage disk located above the disk D1 brought to the playback position, as shown in FIGS. 14 and 15, and moves the supported storage disk up and down with its rotation. Upper hold screw 301A-301C provided with a spiral guide, and disk D1
Holder screws 302A-30 provided with a helical guide for supporting the peripheral edge of the storage disk located below the storage disk and moving the supported storage disk up and down as the storage disk rotates.
2C and an intermediate hold screw 303A-303 having a spiral guide for supporting the periphery of the reproduction disk D1 and vertically moving the reproduction disk D1 with the rotation.
C.

According to the disk reproducing apparatus 300, during reproduction, the intermediate hold screws 303A to 303C are
4 and is separated from the reproduction disk D1. The reproduction disk D1 is clamped between the turntable 306 of the disk reproduction mechanism 304 and the clamper 307, is driven to rotate, and is reproduced by the optical head 308. In this state, for example, if the disk D2 is selected, the disk is exchanged according to the following procedure. (1) The intermediate hold screws 303A to 303C are brought to the positions indicated by the dotted lines, and the peripheral edge of the disk D1 is supported. (2) The turntable 306 and the clamper 307 are vertically separated from each other, and the mounting of the disk D1 on the disk reproducing mechanism 304 is released. (3) The disc reproducing mechanism 304 rotates counterclockwise,
Retract outside the disk. (4) The lower hold screws 302A to 302C make one turn clockwise, the discs D2 to D5 rise one step, and the disc D2 moves to the middle hold screw 303A.
３０３303C is brought to a height that engages the spiral guide. (5) The intermediate hold screws 303A to 303C are rotated a predetermined number of times in the clockwise direction, and the disk D1 is at the height at which the spiral guide of the upper hold screws 301A to 301C is engaged, and the disk D2 is at the reproduction position. Will be brought. (6) The upper hold screws 301A to 301C make one turn clockwise, and the disk D1 rises one step. (7) The disc reproducing mechanism 304 is rotated clockwise, and brought to a position where the reproduced disc D2 can be clamped. (8) The turntable 306 and the clamper 307 move close to each other, and the disc D2 is mounted on the disc reproducing mechanism 304. (9) The intermediate hold screws 303A to 303C move to the retreat position shown by the solid line in the drawing, and are separated from the periphery of the disk D2.

[0005]

As described above, according to the disk reproducing apparatus 300 described above, the intermediate hold screw is used.
In order to separate 303A-303C from the disc mounted on the disc reproducing mechanism, each of them must be moved in different horizontal directions, so that a complicated moving mechanism is required, which hinders miniaturization of the apparatus.

Further, as described in the above (1) to (9), the disk reproducing apparatus 300 requires many operation steps for disk exchange, so that the disk exchange time is slow and sophisticated operation control is required. Met. Further, as many as nine hold screws are required for the upper, lower, and middle portions, and the number of parts is large, resulting in an increase in cost.

[0007]

SUMMARY OF THE INVENTION The present invention provides a disk reproducing apparatus which solves the above-mentioned problems. A first apparatus of the present invention supports a peripheral edge of a disk and rotates the disk by rotating the disk. A plurality of hold screws with a spiral guide for moving in a direction perpendicular to the surface,
A disk reproducing means for reproducing the disk, a mounting means for mounting the disk on the disk reproducing means by moving the disk relative to the disk reproducing means, and a hold screw rotating and holding the screw. And a separating means for moving the hold screw away from a disk mounted on the disk reproducing means by moving the hold screw in a direction perpendicular to the disk reproducing means.

The second apparatus of the present invention is a disk reproducing apparatus capable of coaxially storing a plurality of disks and reproducing a selected reproduction disk at a reproduction position coaxial with the storage position, and supporting a peripheral edge of the disk. A plurality of upper hold screws provided with a spiral guide for moving the disk supported by the rotation in a direction perpendicular to the disk surface, and supporting the periphery of the disk, and rotating the disk supported by the rotation in the vertical direction. A plurality of lower hold screws provided with a spiral guide for moving; a disk reproducing means for reproducing a reproduced disk; and an upper hold screw comprising a reproduced disk and a disk disposed on one surface side of the reproduced disk.
Means for rotating the upper and lower hold screws until the disk supported by the spiral guide of the reproduction disk and supported by the spiral guide of the lower hold screw. Means for forming a space in which a disc reproducing means can be inserted between a reproducing disc and a disc arranged on the other surface side; means for inserting the disc reproducing means into the space; By moving the upper hold screw relative to the disk reproducing means by moving the upper hold screw relative to the disk reproducing means by moving the upper hold screw relative to the disk reproducing means by moving the upper hold screw relative to the disk reproducing means. By moving vertically, the upper hold screw is separated from the reproducing disk mounted on the disk reproducing means. And means for, consists of.

[0009]

According to the first apparatus of the present invention, the disk is moved relative to the disk reproducing means, whereby the disk is mounted on the disk reproducing means, the hold screw is rotated, and the disk is moved. Moving the hold screw in a direction perpendicular to the disc reproducing means, thereby separating the hold screw from the disc mounted on the disc reproducing means.

According to the second apparatus of the present invention, the reproduction disk and the disk disposed on one surface side of the reproduction disk are supported by the spiral guide of the upper hold screw,
The upper hold screw and the lower hold screw are kept until the disk arranged on the other side of the playback disk is supported by the spiral guide of the lower hold screw.
Is rotated so that a disc playback means can be inserted between the playback disc and the disc arranged on the other side.
Forming By inserting the disc reproducing means into this space and moving the reproduced disc relative to the disc reproducing means, the reproduced disc is mounted on the disc reproducing means. Then, the upper hold screw is rotated and the upper hold screw is moved in the vertical direction relatively to the disk reproducing means, so that the upper hold screw is mounted on the reproducing disk mounted on the disk reproducing means. Keep away from

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a disk clamp apparatus 100 used in the disk reproducing apparatus of the present invention, FIG. 2 is a perspective view of a main part of the disk reproducing apparatus 1000 of the present invention, and FIG. 3 is a top view of the disk reproducing apparatus 1000.

The disk reproducing apparatus 1000 has 5
A changer-type disc reproducing apparatus capable of storing the discs D1 to D5 and selectively reproducing the disc is constituted. Upper hold screw-20A-20
C is rotatably supported on the lower surface of the top holder 10 and is simultaneously rotationally driven by the hold screw driving mechanism M1. As shown in FIGS. 2 and 8, the outer peripheral surfaces of these upper hold screws 20A to 20C support the peripheral edge of the disk and move the disk up and down by 3 mm.
The spiral guides 21A to 21C of the pitch are formed,
At its lower end, a lower hold screw 30A to be described later
Protrusions 22A to 22C that are fitted to recesses 32A to 32C formed at the upper end of 30C are formed to protrude.

Below the upper hold screws 20A to 20C, lower hold screws 30A to 30C are arranged to face each other. Lower Hold Screw-30A-30
C is rotatably supported on the upper surface of the bottom holder 11, and spiral guides 31A to 31C continuous with the spiral guides 21A to 21C are formed on the outer peripheral surface thereof.

The disc reproducing mechanism 200 is inserted between the disc D3 supported at the lowermost position of the upper hold screws 20A to 20C and the disc D2 supported at the uppermost position of the lower hold screws 30A to 30C. The top holder 10 and the bottom holder 11 described above are supported by a main chassis (not shown) so as to be vertically movable for mounting on the disc reproducing mechanism 200.
The top holder 10 is guided by the upper screw guide 14A and the guide shaft 13. When the screw guide 14A is driven to rotate by the top holder driving mechanism M2, the top holder 10 places a disk D3, which is supported at the lowest position, on the turntable (see FIG. 8, FIG. 8). It moves up and down between the position shown in FIG. 11) and the upper retreat position (FIG. 13), which is moved 5 mm above the position and retreated above the disk reproducing mechanism 200. On the other hand, the bottom holder 11 is
It is guided by a screw guide 14B (which is hidden in the drawing and cannot be seen in the drawing) and a guide shaft 13 arranged below A. The bottom holder 11 is rotated by the bottom holder driving mechanism M3 so that the screw guide 14B is rotated.
A to 30C are brought to the disk mounting position.
8 and a lower retreat position (FIG. 1), which is moved 17 mm below the position and retracted below the disk reproducing mechanism 200.
Move up and down between 0).

When the bottom holder 11 is brought to the retracted position, the lower hold screws 30A to 30C are used.
It is locked by a lock mechanism (not shown) and is held at the rotation angle. On the other hand, the upper hold screw-20A ~
The spiral guides 21A to 21C are connected to the lower hold screw 30C by detecting the rotation angle.
It is connected to the lower hold screws 30A to 30C so as to be continuous with the spiral guides 31A to 31C of A to 30C. In the coupled state shown in FIG.
When the upper hold screws 20A to 20C are rotationally driven by the drive mechanism M1, the periphery of the upper hold screw
Spiral guide 21A-2 of the screw 20A-20C
1C or lower holder screw 30A-30C is guided by spiral guide 31A-31C, and holder 10
And up and down. As described above, since the spiral guide is formed at a pitch of 3 mm, the discs D1 to D5 are raised by 3 mm each time the hold screw makes one clockwise rotation when viewed from the upper surface of the apparatus, and the lower disc is moved to the next lower disc. It is brought to the playback position (the position of the disk D3 in FIG. 8). Of course, if the hold screw rotates counterclockwise, the disk will descend.

The disc reproducing mechanism 200 has a height such that the upper surface of the turntable 40 (more precisely, the upper surface of the compressed urethane 223) coincides with the lower surface of the disk brought to the reproducing position. It is supported rotatably in the horizontal direction. The disc reproducing mechanism 200 is driven by the optical mechanism driving mechanism M4, and stops at a position (dotted line in FIG. 3) retracted outside the discs D1 to D5 and a turntable 40.
Is rotated between the rotation center of the disc and the reproduction position (the position indicated by the solid line in FIG. 3) which coincides with the disc center.

As shown in FIG. 1, the turntable 4
0 is a spindle motor fixed to the lower surface of the mechanical chassis 42.
5 is fixed to a rotation shaft 41A (FIG. 5). Tar
An annular compressible urethane 223 is attached to the periphery of the upper surface 40A of the table 40 in order to prevent rattling at the time of disc clamping due to disc thickness errors and slip with the disc lower surface. . In order to position the disc coaxially with the turntable 40, a substantially cylindrical centering portion 40C which engages with the disc center hole Ds is formed on the turntable upper surface 40A so as to project therefrom. Is a stopper shaft 45 described later.
Coupling part 40D, the upper surface of which is shaped like a tooth, for coupling
Are formed to protrude.

The three chuck members 43 press the periphery of the disk center hole Ds, and are inserted into a square hole 40B formed on the turntable 40 in a radial direction.
It is supported rotatably about C. A cam plate (control member) 44 for controlling the movement of the chuck member 43 is provided with a coupling portion 44A having an upper surface formed in a tooth shape so as to be coupled to a drive shaft 46, which will be described later, and extends from the peripheral surface thereof.
And a guide portion 44C for guiding the third pin 43B. The cam plate 44 has a connecting portion 40D of the turntable 40 in a connecting portion 44A and a guide groove 4 of a guide portion 44C.
4B, the pins 43B of the chuck member 43 are respectively inserted into the recesses 4 formed on the inner surface side of the centering portion 40A.
It is rotatably mounted in 4E. The guide groove 44B has a gradually increasing guide radius from the start end 44s to the end 44e, and the guide portion 44C has the chuck member 4 at the start end 44s and the end 44e of the guide groove 44B.
No. 3 pin 43B is elastically clamped, and a cam play
G is prevented from rotating.

On the other hand, a stopper shaft 45 which penetrates through the disk spindle hole Ds supported by the upper hold screws 20A to 20C and is connected to the above-mentioned connecting portion 40D is fixed to the lower surface of the top holder 10, and the periphery thereof is fixed. A rotatable drive shaft 46 is connected to the connecting portion 44A of the cam plate 44. The connecting portion 45A serving as the lower end of the stopper shaft 45 and the connecting portion 46A serving as the lower end of the drive shaft 46 are connected to the connecting portion 40 of the turntable 40 brought to the disc reproducing position.
B and the connecting portion 44A of the cam plate 44, and FIG.
As shown in FIG. 1, when the top holder 10 is lowered to the disk mounting position, the top holder 10 is brought into the coupled state. Connection part 45A
When the drive shaft 46 is driven to rotate by the cam plate driving mechanism M5 (FIG. 8), the cam plate 4 is locked.
4 rotates inside the concave portion 40E of the turntable 40.

As shown in FIGS. 4 and 5, the guide groove 4
When the pin 43B is located at the starting end 44s of the 4B, the chuck member 43 is held at the unclamping position where the tip 43A is inside the disk center hole Ds. At this time, the cam plate 44 elastically clamps the pin 43B at its starting end 44s to prevent rotational displacement due to vibration or the like. When the cam plate 44 rotates counterclockwise as viewed from the top of the apparatus, the pin 43B of the chuck member 43 is inserted into the guide groove 44.
By being guided by B, the tip 43A rotates in the direction toward the outside of the turntable. As shown in FIGS. 6 and 7, the pin 4 is inserted into the starting end 44s of the guide groove 44B.
When 3B is located, the chuck member 43 has its tip 43A.
Pivots to a clamping position where it engages with the periphery of the center hole Ds of the disk, and clamps the disk on the turntable. Further, the cam plate 44 elastically clamps the pin 43B at the terminal end 44s to prevent a rotational displacement due to vibration or the like.

Next, the above-described disk reproducing apparatus 1000
The operation from the stop state to the reproduction state for reproducing the disk D3 will be described in order with reference to FIGS. In the stop state, the disc reproducing mechanism 100
Is brought to the stop position, and the cam plate 44 is
The pin 43B of the chuck member 43 is elastically held at the start end 44A of the guide groove (FIG. 4). Therefore, the chuck member 43 is brought to the unclamping position where the tip end 43A is located inside the disk center hole Ds. On the other hand, the top holder 10 and the bottom holder 11 are brought to the connecting positions where the upper hold screws 20A to 20C and the lower hold screws 30A to 30C are connected.

When the disk D3 for which reproduction has been instructed has not been brought to the reproduction position, first, the upper hold screws 20A to 20C are driven to rotate by the drive mechanism M1, and the disk D3 is brought to a height position aligned with the reproduction position. Will be brought. When the disk D3 is aligned with the reproduction position, the upper disks D3 to D5 are moved to the upper hold screws 20A to 20A-2.
The two discs D1 and D2, which are supported by the spiral guides 21A to 21C of O.C. and located below the reproduction disk D3, are the spiral guides 3 of the lower hold screws 30A to 30C.
It will be in the state supported by 1A-31C (FIG. 8).

When the disc D3 instructed to be reproduced is brought to the reproduction position, the screw guide 14A is driven by the drive mechanism M.
2 to rotate the top holder 1
0 is brought to the upper retreat position 5 mm higher than the disc mounting position (Ref) in FIG. 8 (FIG. 9). Further, when the screw guide 14B is rotationally driven by the driving mechanism M3, the bottom holder 11 is moved to the coupling position (Re).
f) is brought down to the lower retreat position 17 mm lower. As described above, the disks D3 to D5 are spiral guides 21A to 21C of the upper hold screws 20A to 20C.
And the discs D1 and D2 are supported by the spiral guides 31A to 31C of the lower hold screws 30A to 30C, so that an insertion space for the disc reproducing mechanism 200 is formed between the reproducing disc D3 and the disc D2. You.

Next, by driving the drive mechanism M4, the disc reproducing mechanism 200 is turned from the stop position (the position indicated by the dotted line in FIG. 3).
The disk is brought to the reproduction position (the position indicated by the solid line in FIG. 3) where the center of rotation of the table 40 coincides with the center of the disk (FIG. 10).

Subsequently, the screw guide 14A is rotationally driven by the drive mechanism M2, and the top holder 10 is lowered to the disk mounting position (FIG. 11). Due to this lowering, the disk D3 is placed on the turntable 40, and the lower end 45A of the stopper shaft 45 is connected to the connecting portion 40B of the turntable 40, and the lower end 46 of the drive shaft 46.
A is connected to the connecting portion 44A of the cam plate 44, respectively.

Next, the drive shaft 46 is driven to rotate by the drive mechanism M5, and the cam plate 44 rotates counterclockwise when viewed from the top of the apparatus. Stopper shaft lower end 45A
The turntable 40 is fixed by the connection of the turntable and the turntable 40B, so that only the cam plate 44 rotates in the recess 40E by the rotation of the drive shaft 46. The cam plate 44 guides the pin 43B of the chuck member 43 by the guide groove 44B, and rotates the chuck member 43 in a direction in which the front end 43A is directed to the outside of the turntable. When the pin 43B reaches the end 44e of the guide groove 44B, the tip end 43A of the chuck member 43 engages with the periphery of the disk center hole Ds, and presses and fixes the disk D3 onto the turntable 40. Further, the cam plate 44 is provided at the end 44 of the guide groove 44B.
The pin 43B is elastically held at e, and a state in which a rotational displacement due to vibration or the like is prevented is achieved.

Subsequently, the upper hold screws 20A to 20C are moved counterclockwise (disc D3) by the drive mechanism M1.
To D5 downward), and the drive mechanism M2 lifts the top holder 10 by one pitch of the spiral guides 21A to 21C, that is, 3 mm (FIG. 12). As the upper holder screw rotates and the top holder 10 rises, the upper holder
The hand screws 20A to 20C are smoothly separated from the periphery of the disk D3.

Further, in order to increase the distance between the disk D3 and the upper hold screws 20A to 20C, the drive mechanism M2
The top holder 10 is lifted by 2 mm to the same height position as the upper retreat position shown in FIG. 10 by the drive of (FIG. 13).

With the above operation, the disk D3 is turned
It is in a state of being clamped on the table 40, and thereafter,
The spindle motor 41 is driven to rotate at a predetermined rotation speed, and the recorded information is optically read by the optical head 50. The operation from the reproduction state to the stop state is the reverse of the above-described operation, and a detailed description thereof will be omitted.

It should be noted that the present invention is not limited to the above-described embodiment at all, and it is needless to say that various embodiments can be adopted without departing from the scope described in the claims. .

[0031]

According to the apparatus of the present invention, the hold screw is rotated and the hold screw is moved in the vertical direction relatively to the disk reproducing means. Since the hand screw is separated from the disk mounted on the disk reproducing means, it is not necessary to use a complicated moving mechanism unlike the conventional apparatus, and the apparatus can be downsized.

According to the second aspect of the present invention, in addition to the above-described effects, the number of operation steps for disk replacement is small, and the disk replacement time can be reduced. Further, since an intermediate hold screw is not required, the number of parts is small and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disc clamp device 100.

FIG. 2 is a perspective view of a disc reproducing apparatus 1000 of the present invention.

FIG. 3 is a top view of the disc reproducing apparatus 1000 of the present invention.

FIG. 4 is a top view for explaining the operation of the disc clamp device 100.

FIG. 5 is a sectional view for explaining the operation of the disc clamp device 100.

FIG. 6 is a top view for explaining the operation of the disc clamp device 100.

FIG. 7 is a sectional view for explaining the operation of the disc clamp device 100.

FIG. 8 is a side view of an essential part for explaining the operation of the disc reproducing apparatus 1000 of the present invention.

FIG. 9 is an essential part side view for explaining the operation of the disc reproducing apparatus 1000 of the present invention;

FIG. 10 is an essential part side view for explaining the operation of the disc reproducing apparatus 1000 of the present invention;

FIG. 11 is a side view of an essential part for explaining the operation of the disc reproducing apparatus 1000 of the present invention.

FIG. 12 is an essential part side view for explaining the operation of the disc reproducing apparatus 1000 of the present invention;

FIG. 13 is an essential part side view for explaining the operation of the disc reproducing apparatus 1000 of the present invention;

FIG. 14 is a top view of a conventional disk reproducing apparatus 300.

FIG. 15 is a side view of a conventional disk reproducing apparatus 300.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Top holder 11 Bottom holder 20A-20C Upper hold screw 30A-30C Lower hold screw 40 Turn table 50 Optical head 100 Disk clamp mechanism 200 Disk reproducing mechanism 1000 Disk reproducing device D1-D5 Disk M1 Hold screw drive mechanism M2 Top holder drive mechanism M3 Bottom holder drive mechanism M4 Reproducing mechanism drive mechanism M5 Cam plate drive mechanism

Claims (2)

[Claims] A plurality of hold screws having a spiral guide for supporting a peripheral edge of a disk and moving the supported disk in a direction perpendicular to the disk surface by the rotation thereof.
Disk reproducing means for reproducing the disk; mounting means for mounting the disk on the reproducing means by moving the disk relative to the disk reproducing means; rotating the hold screw And the above
A disc reproducing apparatus comprising: a separating means for separating the hold screw from a disc mounted on the disc reproducing means by moving the hand screw in the vertical direction relative to the disc reproducing means. . 2. A disk reproducing apparatus capable of storing a plurality of disks coaxially and reproducing a selected reproduction disk at a reproduction position coaxial with the storage position, supporting a periphery of the disk, and rotating the disk by rotating the disk. A plurality of upper hold screws provided with a spiral guide for moving the supported disk in the vertical direction with respect to the disk surface; and a spiral for supporting the periphery of the disk and moving the supported disk in the vertical direction by rotating the disk. A plurality of lower hold screws provided with guides; disk reproducing means for reproducing the reproduced disk; and a disk disposed on one surface side of the reproduced disk and the reproduced disk being a spiral of the upper hold screw. A disc supported by a guide and arranged on the other surface side of the reproduction disc is a lower hold screw.
Means for rotating the upper and lower hold screws until supported by the spiral guide, and the disk reproducing means is inserted between the reproduction disk and the disk disposed on the other surface. Means for forming a possible space; means for inserting the disk reproducing means into the space; and moving the reproduced disk relative to the disk reproducing means. Means for mounting the playback disk; rotating the upper hold screw; and moving the upper hold screw in the vertical direction relative to the disk playback means, thereby forming the upper holder. Means for separating the old screw from the playback disk mounted on the disk playback means. apparatus.