JPH0612770A - Device for reproducing disk - Google Patents

Abstract

PURPOSE:To miniaturize a disk reproducing device provided with an automatic changer function and to simplify its constitution. CONSTITUTION:Plural disks 2 of an outer diameter D having the clamp area of a diameter (d) at the center are housed in a disk holder 18 at intervals a prescribed gap vertically. One sheet of disk 2 from the disk holder 18 is transferred in the direction orthogonally intersecting with the axis direction of the disk and placed in a disk reproducing part, and the disk 2 is held by a turntable 48 and a clamper 42 between them, and information is reproduced optically while being driven to be rotated by the turntable 48. This device is constituted so that the horizontal moving amt. L of the disk from the disk reproducing part to the disk holder 18 is set as 1/2(D+d)<=L<D, and the disk 2 in the disk holder 18 and the disk 2 in the reproducing part are superposed on a ground plan.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact disc reproducing apparatus capable of simultaneously loading a plurality of discs as recording media.

[0002]

2. Description of the Related Art A plurality of disks (Compact Disks) are loaded at the same time, one of the disks is selected and transferred to a reproducing position, which is sandwiched by a turntable and a clamper and rotationally driven by the turntable. Then, a disc reproducing apparatus which optically reproduces information recorded on the disc is rapidly spreading.

[0003]

In this technical field, how to reduce the size is now an important theme. However, since one of the plurality of stored discs is transferred to the reproducing position and information is reproduced there, the disc reproducing device divides the disc storing area and the disc reproducing area into each disc. It was considered that at least the area where the disk could be arranged was required in the area. Therefore, it has been considered that the transfer amount of the disk cannot be suppressed to be equal to or less than the diameter of the disk on the plan view, and it has been considered impossible to make the size in the disk transfer direction equal to or less than twice the disk diameter.

The present invention has been made under such circumstances, and an object thereof is to accommodate a plurality of discs in a disc holder at the same time, and transfer one of the discs to a reproducing position to turntable and clamper. In a disc reproducing device that sandwiches the disc with an optical disc and optically reproduces the information recorded on the disc while being rotated by a turntable, it is possible to keep the transfer amount of the disc smaller than the diameter of the disc and to reduce the size of the entire device. It is to plan.

[0005]

The present invention has a diameter d in the center.
A plurality of discs having an outer diameter D having a clamping area are coaxially housed in a disc holder with a predetermined gap in the axial direction, and one disc is transferred from the disc holder in a direction orthogonal to the disc axial direction. In the disc reproducing apparatus for optically reproducing the information recorded on the disc by holding the disc between the turntable and the clamper and rotating the disc by the turntable, the disc reproducing unit The movement amount L to the disc holder in the direction orthogonal to the axial direction is 1 / (D + d)
It is characterized in that it is 2 or more and less than D.

[0006]

[Operation] When the transfer amount of the disk is 1/2 or more of (D + d),
Also, setting to less than D means that the disc in the disc holder and the disc in the disc reproducing portion overlap each other in a plan view, and at least the clamp area of the disc in the disc reproducing portion is at the disc storage position. It means that it does not overlap with the disc. Since the clamp area of the disc is sandwiched between the turntable and the clamper in the disc reproducing section, it is necessary to prevent the clamp regions from overlapping each other, but it is not necessary to transfer the disc holder a long distance until it is separated from the disc.

Even if the disc of the disc reproducing portion overlaps with the disc of the disc holder in a plan view, if the clamp regions do not overlap and they are not in contact with each other in the vertical direction, there is no problem in the rotation drive by the turntable. Absent. Further, since the program areas are only partially overlapped, optical information reproduction can be performed without any problem by using the non-overlapped portions of the program areas. By thus performing the information reproduction of the disc in a state of overlapping with the disc in the disc holder, the transfer amount of the disc can be suppressed to less than the diameter of the disc, and the entire apparatus can be dramatically reduced in size.

[0008]

1 to 12 show a first embodiment in which the disc holder cannot be removed from the main body of the apparatus. FIG. 1 is a plan view showing a mechanical portion of the disc reproducing apparatus, and 1 is a main chassis. On the upper left side of the upper surface of the main chassis 1, a disc receiver 3 for holding the disc 2 at a predetermined position in the disc reproducing portion is provided between the disc reproducing portion and a predetermined pull-out position shown by a chain double-dashed line in the figure. It is mounted so that it can move freely. As shown in FIG. 2, the disc receiver 3 is provided with a placing portion 4 on which the disc 2 is placed, and an elongated guide arm portion 5 connected to one side of the placing portion 4.

As shown in FIG. 2, a linear external guide surface 7 for contacting the outer circumference of the disk 2 is formed on the upper surface of the disk receiver 3 at a position opposite to the arm 5. Further, an arc wall 8 surrounding the outer circumference of the so-called 12 cm diameter disk 2 by about one third is formed continuously on the outer guide surface 7 in the mounting portion 4 of the disk receiver 3. Inside the circular arc wall 8 is a circular recess 9 on which a so-called 8 cm diameter disc is placed.
However, it is formed concentrically with the arc wall 8 and deeper. The inner bottom surface of the circular concave portion 9 is formed to be slightly higher only in the peripheral portion so as to protect the information recording area on the lower surface of the disc when a so-called 8 cm disc is mounted. A large opening is made from the center of the circular recess 9 toward the other arm 6 side (opening 10).

The arc wall on the side opposite to the opening 10
A concave portion 11 is formed in the inner part of the concave portion 8.
A finger is put in the opening 10 so that the 8 cm diameter disc in the circular recess 9 can be easily taken out. In addition, the mounting portion 4,
Another concave portion 12 is provided outward from the circular arc wall 8 and this concave portion 12 is also 12 cm placed inside the circular arc wall 8.
A finger insertion portion for facilitating removal of the diameter disc 2. A notch 14 is provided between the end of the arc wall 8 and the arm 5, and a recess 15 continuous with the notch 14 is provided at the end of the arc wall 8.

The arm portion 5 is set to have a length about twice the depth of the mounting portion 4, and a groove 16 is formed on the lower surface of the arm portion 5 in the longitudinal direction so as to protrude from the main chassis 1. The guide portion (not shown) is fitted. Therefore, the disk receiver 3 is linearly movable in the left-right direction in FIG. A rack 17 is integrally formed on the lower portion of the outer side surface of the arm portion 5 from the substantially central portion to the left end.

Further, on the right side of the upper surface of the main chassis 1, as shown in FIG. 3, a disk holder 18 for holding a plurality of disks 2 as a single unit in a plurality of stages vertically with a predetermined gap therebetween.
However, it is mounted so that it can move up and down. In the disc holder 18, shelves 19 on which the discs 2 are placed one by one are integrally formed vertically with a predetermined interval. In this example,
The disk 2 stored in the disk holder 18 is a so-called 12 cm
Disc, ie outer diameter D = 120mm, diameter of clamping area d
= 33 mm (see Fig. 5).

The positional relationship between the disc holder 18 and the disc receiver 3 is set as follows. That is, the center position of the disc 2 when the disc 2 is placed on the shelf 19 of the disc holder 18, and the disc 4 on the placing portion 4 of the disc receiver 3.
The distance L on the plan view from the center position of the disk when 2 is placed is set to be 1/2 or more of (D + d) and less than D.

FIG. 5 (a) shows the state of the distance L = (D + d) / 2, and FIG. 5 (b) shows the state of the distance L = D. The reason why L is set to (D + d) / 2 or more is that the clamp area of the disc in the disc reproducing section does not overlap the disc in the disc holder because the disc is held between the turntable and the clamper. Is. The reason why L is set to less than D is that if L is set to D or more, it is against the original purpose of the present invention, which is to reduce the size of the entire apparatus. However, in this embodiment, as shown in FIG. 1, L is set to be slightly larger than (D + d) / 2.

As shown in FIG. 1, an external guide surface provided on the disk receiver 3 is provided on the inner wall surfaces between the shelves 19 and between the upper plate 20 of the disk holder 18 and the uppermost shelf 19. An internal guide surface 21 is formed which is located on the same straight line as that of 7. The top plate 20 of the disk holder 18 and the shelf 19 have the same shape,
Although formed in dimensions, the shape of the disc reproducing portion side is formed so as to follow the outer peripheral shape of the disc 2 when the disc 2 is placed on the placing portion 4 of the disc receiver 3 in a plan view.

Between the shelves 19 and between the upper plate 20 and the uppermost shelf 19
Set the space between and so that it becomes slightly narrower in the back,
If you hold the edge of the disc lightly, the holder 18
It is possible to reliably prevent the disc 2 from coming off. In addition, slide the top surface of each shelf 19 from the disk guide side 29
The information recording area on the lower surface of the disc can be slightly floated from the upper surface of the shelf 19 by slightly inclining downward to the side and inclining downward from the anti-reproducing section side to the reproducing section side. It is possible to protect the information recording area.

The disc holder 18 is provided with the inner guide surface 21 and a 12 cm diameter disc which is continuous with the inner guide surface 21 on the side opposite to the disc reproducing portion and the side opposite to the guide arm portion 5.
2 is closed by an arc-shaped wall surface 22 conforming to the outer peripheral shape of the disc 2. However, the disc reproducing portion side is opened over the entire area, and the guide arm portion 5 side is also accommodated in the disc 2 stored as shown in FIG. A line A that passes through the center and is orthogonal to the inner and outer guide surfaces 21, 7 is used as a reference, and an opening is formed at least from a position on the opposite side of the disc reproducing portion to the disc reproducing portion side.

Therefore, as shown in FIG. 1, the disc 2 is largely exposed from the disc holder 18 to the outside from the edge portion on the disc reproducing portion side to the edge portion on the guide arm portion 5 side. Will be placed on top. Especially the guide arm
The reason for exposing on the 5 side is to facilitate the transfer of the disc. A female screw bush 23 is attached to a corner portion of the disk holder 18 outside the arc-shaped wall surface 22 as shown in FIGS. On the other hand, as shown in FIG. 3, a sub-chassis 24 mounted below the main chassis 1 with a predetermined distance from the main chassis 1 has a feed screw shaft 26 having a belt pulley 25 at the lower end. Is rotatably supported. The screw shaft 25 is screwed into the female screw bush 23, and is configured to drive the disc holder 18 up and down by rotation of the screw shaft 25.

As shown in FIG. 2, a guide groove 28 is formed on the inner and outer surfaces of the upper portion of the guide arm portion 5 of the disk receiver 3 over the entire length, and a slide member 29 is formed in the guide groove 28. Is movably fitted. These guide grooves 28
And the slide body 29 is a disc reproducing portion and a disc holder.
A disk transfer mechanism for transferring the disk 2 to and from 18 is configured. The slide body 29 has a rack 30 over the entire length at the lower portion of the outer surface thereof. Further, the upper plate portion 31 of the slide body 29 projects toward the inside of the disc receiver 3, and the inner edge portion of the upper plate portion 31 is, as shown in FIGS. 2 and 6 (a) and 6 (b). A circular arc concave shape is formed along the outer circumference of the disk 2, and the sending projections 32 for pressing the outer circumference of the disk 2 at the right end and the left end of the circular arc concave, respectively.
And a return protrusion 33.

Then, when the slide body 29 moves along the guide groove 28, the disk 2 is projected onto the projections 32, 33 of the slide body 29.
By pressing the outer periphery in a direction parallel to the inner and outer guide surfaces 21, 7 by contacting the outer periphery with the inner and outer guide surfaces 21, 7, the mounting portion 4 of the disc receiver 3 and the predetermined height of the disc holder 18. It will be transferred linearly to and from the shelf 19.

On the lower surface of the upper plate portion 31, as shown in FIG.
As shown in (b), the tip was thinly formed into a knife shape. 2
One support piece 34, 35 is rotatably provided. These supporting pieces 34, 35 are for allowing the knife-like tip to enter the lower surface side of the disk 2 in a wedge shape and slightly lift the disk 2 from the upper surface of the shelf 19 of the disk holder 18.
A spring (not shown) is constantly urged to rotate so that its tip projects from the arcuate recess of the upper plate 31. However, when the slide body 29 is at the end position on the disc holder 18 side, the support pieces 34, 35 are projected onto the projections 36, 37 protruding from the guide arm portion 5 of the disc receiver 3 as shown in FIG. 6B. Abut,
In order not to hinder the vertical movement of the disk holder 18, the disk holder 18 is rotated in a direction against the spring and hidden on the lower surface side of the upper plate portion 31.

Further, the sub chassis 24 and the disc holder
As shown in FIG. 4, a pair of pantograph mechanisms 38 constituting a holder elevating mechanism are suspended between the outer surfaces of 18 and. These pantograph mechanisms consist of a pair of link elements.
39, 40 are rotatably connected to each other via a hinge pin 41 at the center, and one end of each link element 39, 40 is rotatably connected to the outer surface of the disc holder 18 and the sub chassis 24. The other ends of the elements 39 and 40 are connected to the outer surfaces of the sub-chassis 24 and the disk holder 18 so as to be horizontally movable.

On the other hand, a clamper support body 43 for supporting the clamper 42 is fixed to the main chassis 1 as shown by a chain double-dashed line in FIG. The clamper 42 is made of a magnetic material such as a thin iron plate, and its position is set to a position above the center of the disc 2 when the disc 2 is in the disc reproducing portion.

On the lower surface side of the main chassis 1, FIG.
A reproducing mechanism 44 is arranged as shown in FIG. In the reproducing mechanism 44, an optical head 46, a motor 47 for driving the same, a turntable 48, a motor 49 for driving the same, and the like are attached to a rotating plate 45 mounted on the lower surface of the main chassis 1 so as to be vertically rotatable. It has a different configuration. At least a part of the turntable 48 is formed of a magnet. The turntable 48 is located below the lower surface of the mounting portion 4 when the rotating plate 45 is in the downward rotating position as shown in FIG. 8B, and the rotating plate 45 is shown in FIG. 8A. As described above, as it rotates upward, it rises to a position slightly above the upper surface of the mounting portion 4 through the opening 10 of the mounting portion 4.

At the rotating end of the rotating plate 45, an engaging pin 50 is provided so as to project as shown in FIG. Also, on the lower surface side of the main chassis 1, a playback mechanism lifting cam 5 as shown in FIG.
1 is rotatably arranged. This playback mechanism lifting cam 5
In the reference numeral 1, an inclined slit 52 is provided on a peripheral wall of a cylindrical body, and the engaging pin 50 is inserted into the slit 52. In addition, a gear part 53 is provided on the upper outer periphery of the unit elevating cam 51.
Are formed. The vertical movement of the disc holder 18 and the reproducing mechanism 44 is performed as shown in FIGS. 7 and 10.
It is performed by the motor 55. In FIG. 7, all gears are shown as simple circles for simplification, and each meshing position is shown as a black dot. Further, FIG. 10 schematically shows the meshing relationship of gears.

That is, as shown in FIGS. 7 and 10, a clutch gear 56, which is composed of a gear having a large size and a small size, is provided so as to be vertically movable, and the large gear is a motor gear 57 having a wide tooth width attached to the rotary shaft of the first motor 55. The small gear is configured to selectively mesh with the rotation transmission system on the disc holder lifting drive side at the upper position and the rotation transmission system on the playback mechanism lifting drive side at the lower position. . The rotation transmission system on the drive side for raising and lowering the disk holder is composed of a gear 58 with a belt pulley. The pulley 25 and the pulley 25 are interlocked with each other via a belt 60.

The rotation transmission system on the drive side of the reproducing unit is composed of a single large and small integrated gear 61, and the small gear of the clutch gear 56 is selectively meshed with the large gear to form a large and small integrated gear 61. The small gear has a gear part of the playback mechanism lifting cam 51.
53 is always meshed. The clutch gear 56 is normally located at the lower position shown by the chain double-dashed line in FIG. 10 by the spring 62, and the small gear meshes with the gear 61 on the drive mechanism for raising and lowering the reproduction mechanism. The small gear is moved up to the position shown by and the small gear comes into mesh with the belt pulley gear 58 on the disc holder lifting drive side.

On the other hand, the slide body 29 and the disk receiver
The horizontal advancing / retreating drive of 3 is performed by the second motor 64 shown in FIG. That is, as shown in FIG. 4, the rotation of the second motor 64 is controlled by the large gear through the motor gear 65 and the large and small integrated gear 66.
It is sequentially transmitted to the gear 67, and is decelerated and transmitted to the pinion 68 formed integrally with the large gear 67. The rack 30 of the slide body 29 and the rack 17 of the disk receiver 3 are selectively meshed with the pinion 68.

FIG. 11 schematically shows the meshing relationship between the pinion 68 and the racks 17 and 30, and the rack 30 of the slide body 29 is usually shown in FIG.
It horizontally reciprocates between the positions shown in (a) and (b). The notch 14 provided in the disk receiver 3 is for ensuring the passage of the slide body when the slide body moves to the mounting portion side. That is, FIG. 11A shows a state before the slide body 29 sends out the disc 2 from the disc holder 18, and FIG. 11B shows the slide body 29 sends out the disc 2 from the disc holder 18 to the mounting portion 4 of the disc receiver 3. It shows the state of being done. Figure 1
In 1 (b), the disc receiver 3 is in a predetermined disc reproducing portion, and the rack 17 of the disc receiver 3 is not meshed with the pinion 68.

However, when the pinion 68 is further rotated counterclockwise from the state of FIG. 11B, the slide body 29 is excessively moved to the left along with this, and at that time, the slide body 29 is moved.
A part of the disk receiver 3 by the return projections 33 of 29, that is, the recess 1
By pressing the inner wall surface of the disk 5, the rack 17 of the disk receiver 3 is brought into mesh with the pinion 68 as shown in FIG. Then, as the pinion 68 rotates counterclockwise, the disc receiver 3
Is further moved to the left to be in the state of (d) in the figure, but the slide body 29 also rides on the disk receiver 3 and moves together with the disk receiver 3.

When the second motor 64 is rotated clockwise in the state shown in FIG. 11D, the disc receiver 3 moves to the right. At this time, the inner wall surface of the recess 15 of the disc receiver 3 has the slide member 29. When the return protrusion 33 is pressed in the opposite direction, the state shown in FIG. In addition, the disk receiver
When the disk receiver 3 is in the position shown in FIG. 11C, for example, if the disk receiver 3 is elastically held at the disk reproducing position by an elastic holding mechanism (not shown), the disk receiver 4 will move when the slide body 29 moves. There is no fear of moving.

Next, the operation of the first embodiment will be described. The disc 2 is stored in the disc holder 3 as follows. First, the slide body 29 is moved to the disc reproducing portion side by the second motor 64, and the disc receiver 3 is moved in the direction opposite to the disc holder 18 to obtain the state of FIG. 11 (d), and the plunger 63 is further energized. Clutch clutch 56
Is engaged with a belt pulley gear 58, and then the feed screw shaft 25 is rotated by the first motor 55 to position the disc holder 3 at the uppermost stage.

Then, the first 12 cm diameter disc 2 is placed on the placing portion 4. At this time, since the peripheral edge of the lower surface of the 12 cm diameter disk 2 is placed on the supporting pieces 34 and 35, and a slight gap exists between the information recording surface of the lower surface of the disk and the upper surface of the mounting portion 4, the information recording is performed. The surface is protected. Next, the second motor 64
The disc receiver 3 is returned to the disc reproducing portion by the motor 64, and the slide body 29 is further moved to the disc holder 18 side by the motor 64 so that the state shown in FIGS. Store.

Subsequently, the disk holder 18 is lowered by one step by the first motor 55, and then the slide body 29 and the disk receiver 3 are moved again to the position of FIG. The second disc 2 is placed on the part 4, and the 12 cm disc 2 is stored up to the uppermost shelf 19 in the same manner.

If the disc is placed on the placing portion 4 in the state of FIG. 11 (d) and only the disc reproducing portion reproduces it, a disc having a diameter of 8 cm may be placed, but it may be slid. Body 29 is made for a 12 cm diameter disc, so 8 cm
The disc with the diameter cannot be stored in the disc holder 18.
Even if it can be stored by some means, it is difficult to take it out again. Therefore, when an 8 cm diameter disc is placed on the placing portion 4, the disc is placed on the disc holder.
If you take safety measures so that the second motor 64 does not operate even if you try to store it in 18, it is even more secure.

Next, when one of the plurality of discs 2 stored in the cassette holder 18 is selected and its information is to be reproduced, the disc to be reproduced is the shelf of the disc holder 18 at which stage. After checking whether it is in 19, specify the column. Then, the plunger 63 is energized, and the first
The disc holder 18 is moved up and down by the motor 55, so that the disc 2 at the designated stage matches the height of the disc reproducing portion.
Then, the second motor 64 moves the slide body 29 to the side of the disk reproducing portion, and the state shown in FIG. 11B is obtained. At the beginning of this movement, the support pieces 34, 35 are disengaged from the protrusions 36, 37 and
Since the 2 cm disc 2 is slightly scooped from the bottom side,
The disk 2 is pushed to the vicinity of an appropriate position on the mounting portion 4 by being pushed by the sending projection 32 of the slide body 29 while the information recording area on the lower surface of the disk 2 is protected.

When a reproducing operation is performed there, when a disk having a diameter of 12 cm or 8 cm exists on the mounting portion 4 in the state of FIG. 7B, the state is detected, and as a result, the first motor 65 rotates. Then, the playback mechanism lifting cam 51 is rotationally driven,
The rotating plate 45 rotates upward, the turntable 48 enters the center hole of the disc as shown in FIG. 7B, and the taper surface of the turntable 48 positions the disc at an appropriate position with high precision. In addition, the clamper 42 is lifted up slightly from the clamper support body 43 while being magnetically attracted, and the clamp area at the center of the disk is sandwiched between the turntable 48 and the clamper 42, and the turntable 48 The rotation drives the disk to rotate. Then, the information recorded on the disk 2 is reproduced by the optical head 46.

At this time, the disc 2 being reproduced is in the holder 1
Although it overlaps with the disk 2 in 8 in the plan view, since the dimension lifted by the turntable 48 is very small, the intervals between the shelves 19 in the holder 18 should be set in consideration of that amount. For example, there is no risk that the disc 2 being reproduced comes into contact with the disc in the holder 18 located above it. next,
If the stop operation is performed, the turntable 48 and the optical head 46 are stopped, and then the first motor 55 rotates in the other direction to rotate the rotating plate.
45 rotates downward, and the disc 2 is placed on the placing portion 4 again.

Further, when it is desired to exchange the disc on the mounting portion 4 with another disc 2 in the disc holder 18 to reproduce information, the stage in which the desired disc is stored is designated and the disc exchange operation is performed. Should be done. At this time, the placing section 4
If the disk placed on top is a disk with a diameter of 12 cm and no other disk is stored in the shelf 19 at a height position that matches the disk playback section, after checking that state with a sensor, The second motor 64 rotates, the slide body 29 is driven by the second motor 64, and the disc holder 18
Then, the return projection 33 pushes the outer circumference of the disk 2 on the mounting portion 4 to transfer the disk 2 to a predetermined shelf 19 in the disk holder 18 while contacting the guide surfaces 7 and 21.

However, the disc placed on the placing portion 4 is a disc having a diameter of 8 cm, or the disc holder 18
The second motor 67 does not rotate when another disk is present on the shelf 19 located at the predetermined height. Therefore, 8 cm
The problem that the radial disc cannot be taken out from the disc holder 18 or the disc is damaged when it is tried to double-insert into one shelf 19 can be prevented in advance.

Therefore, according to the disc reproducing apparatus of the first embodiment, the transfer amount of the disc 2 from the disc holder 18 to the disc receiver 3 is within a range that does not hinder the sandwiching of the disc by the turntable 48 and the clamper 42. The disc holder 18
Since the information is reproduced in a state of overlapping with the inner disk 2, the size of the entire apparatus in the disk transfer direction can be significantly reduced.

Further, since the disc holder 18 stores the disc directly without using a tray, the height dimension of the disc holder 18 can be greatly reduced, and the disc can be selected. The vertical movement of the disc holder 18 can be small. Therefore, the disc holder 18 can be made smaller and lighter, and the vertical movement mechanism thereof can be simplified.

Further, the disc holder 18 and the disc receiver 3
Since the disk 2 is transferred between the disk and the slide body 29 by pushing out the outer circumference of the disk by the sending or returning projections 32 and 33 of the slide body 29 and bringing the other outer circumference of the disk into contact with the guide surface, the disk is extremely light. It is possible to transfer, and the disk transfer mechanism can be configured easily and in a small size.
The size of the entire device can be further reduced. Further, since the disc receiver 3 is movable in the direction opposite to the disc holder 18, when the disc is placed on the placing portion 4, it is hindered by the clamper 40 by pulling the disc receiver 3 outward. It can be placed easily without any.

FIG. 13 shows a second embodiment of the present invention. In this embodiment, the disc holder can be detached from the main body of the apparatus, and the disc receiver can be moved up and down although it cannot be moved in the horizontal direction. That is, a disk holder 71 similar to that of the first embodiment is arranged on the right side of the chassis 70 in FIG. 13, and a disk receiver 72 similar to that of the first embodiment is arranged on the left disk reproducing portion. Since the disc receiver 72 does not move horizontally, no rack is provided. The distance L on the plan view between the disc center position when the disc 2 is placed in the shelf of the disc holder 71 and the disc center position when the disc is placed on the placing portion of the disc receiver 72 is the first embodiment. As in the example (D + d)
It should be set slightly larger than 1/2.

The disc holder 71 is held by a holding frame 73 provided on the chassis 70, and can be attached to and detached from the holding frame 73 from the reproducing section side. The disk receiver 72 is mounted on the chassis 70 so that it can be moved up and down by a pantograph mechanism 74 while maintaining the parallel state. A reproducing mechanism (not shown) similar to that of the first embodiment is attached to the disc receiver 72 so as to be vertically rotatable, and the clamper support 76 supporting the clamper 75 is also fixed to the disc receiver 72. ing.

Further, a slide body 78, which is also similar to that of the first embodiment, is mounted on the guide arm portion 77 of the disk receiver 72 so as to be freely reciprocated left and right. The rack 79 of the slide body 78 is
The pinion 80 for horizontally driving the slide body is always meshed, but the height of the slide body 78 changes as the disc receiver 72 moves up and down, so that the pinion 80 having a wide tooth width is used. The height of the disc holder 74 is equal to the disc holder 71.
Although the control is performed according to the pitch interval of the shelves inside, the description of the drive mechanism is omitted. The description of the mechanism for vertically rotating the reproducing mechanism is also omitted. Further, the driving of the pinion 80 has the same configuration as that of the first embodiment.

Next, the operation of the second embodiment will be described.
First, when the disc 2 is stored in the disc holder 71, the disc holder 72 is lowered to the lowest position to avoid interference between the slide body 78 and the disc in the disc holder 71, and the disc holder 71 is held by the holding frame 73. Then, the disc is stored in each shelf in the disc holder 71. However,
Since the 8 cm diameter disc cannot be transferred with the slide body 78, 1
Only use 2 cm diameter discs. After the disc is stored, the disc holder 71 is again held by the holding frame 73.

Next, in order to select one disk 2 and reproduce its information, the number of shelves in which the disk 2 to be reproduced is stored is specified and the disk receiver 72 is positioned at a predetermined height. After that, the slide body is rotated by rotating the pinion 80.
78 is moved to the reproducing portion side, and the predetermined disc 2 is transferred onto the mounting portion of the disc receiver 72. The subsequent reproduction operation procedure is the same as in the first embodiment. To replace the playback disc, move the slide body 78 to the disc holder 71 side to return the disc 2 on the mounting portion to the shelf in the disc holder 71, and then match the height position of the disc to be played next. This can be realized by moving the disc receiver 72 up and down and moving the slide body 78 again to the reproducing unit side.

Therefore, according to the disc reproducing apparatus of the second embodiment, as in the first embodiment, the disc transfer amount from the disc holder 71 to the disc receiver 72 is reduced, so that the disc 2 is stored in the disc holder 71. In addition to the effect of directly storing the disk as a single unit and the effect of transferring the disk between the disk holder 71 and the disk receiver 72 by pushing the outer circumference of the disk with the slide body 78, By making the disc holder 71 detachable, it is possible to obtain the effect that all the discs can be exchanged at once in a short time.

FIG. 13 shows a third embodiment of the present invention. In this embodiment, the disc holder can be detached from the main body of the apparatus and can be moved up and down. That is, an elevating plate 91 is provided on the chassis 90 so as to be able to ascend and descend via a pantograph mechanism 92, and a disc holder 93 similar to that of the first embodiment is attached to and detached from the elevating plate 91 from the side opposite to the disc reproducing portion. It is configured to be able to. The disc receiver (not shown) provided in the disc reproducing portion does not have to be movable up and down, but may be pulled out in the direction opposite to the disc holder 90 as in the first embodiment. A slide body similar to that of the first embodiment is movably attached to this disc receiver.

The elevating plate 91 is driven up and down by the disc holder 93.
Screw the feed screw shaft 95 into the part 94 of the
The belt pulley 96 installed on the
This is done by transmitting the rotation of (not shown). As a measure for preventing the disc holder 93 from coming off the lift plate 91, for example, an upward stopper 91a and a horizontal stopper 91b are provided on the lift plate 91 side, and the edge of the lift plate 91 is fitted on the disc holder 93 side. Appropriate means may be taken, such as providing a fitting groove 93a for

The distance L on the plan view between the center position of the disc housed in the disc holder 93 and the center position of the disc when the disc is placed on the placing portion of the disc receiver is (D + d). Since it is an important point of the present invention that it is ½ or more and less than D, naturally L is set as such also in this embodiment.

Next, the operation of the third embodiment will be described.
First, when the disc 2 is stored in the disc holder 93, the disc holder 93 is lifted to the highest position to avoid the interference between the slide body and the disc in the disc holder 93, and the disc holder 93 is moved from the lift plate 91. The disc is removed and the discs are stored in the shelves in the disc holder 93. However,
Also in this embodiment, since the 8 cm diameter disc cannot be transferred by the slide body, only the 12 cm diameter disc is used. After storing the disc, the disc holder 93 is mounted again on the elevating plate 91.

Next, in order to select one disk 2 and reproduce its information, the number of shelves in which the disk 2 to be reproduced is stored is specified, and the feed screw shaft 95 is driven to rotate. After matching the holder 93 to the height of the disc receiver, drive the slide body to
Are transferred to the mounting portion of the disc receiver. The subsequent reproduction operation procedure is the same as in the first embodiment. To replace the playback disc, move the slide body to the disc holder side to return the disc on the mounting section to the shelf in the disc holder 93, and then adjust the disc holder according to the height position of the disc to be played next.
This can be achieved by raising and lowering 93 and moving the slide body to the reproducing section side again.

Therefore, according to the disc reproducing apparatus of the second embodiment, as in the first embodiment, the effect of reducing the disc transfer amount from the disc holder 93 to the disc receiver is that the disc 2 is placed in the disc holder 93. In addition to the effect of storing directly by itself and the effect of transferring the disc 2 between the disc holder 93 and the disc receiver by pushing the outer periphery of the disc 2 with a slide body, By making the disc holder 93 detachable, all the discs can be exchanged at once in a short time, which is also the same effect as in the second embodiment. In addition, the disc holder is provided with a disc holder as in the first embodiment.
If you configure it so that it can be pulled out in the opposite direction to the 93 side, you can pull out the disc holder outwards and mount the disc.
Not only 12cm diameter discs but 8cm diameter discs can be played.

Although three embodiments have been shown above, the present invention is not limited to these. For example, for the lifting / lowering drive mechanism of the disk holder and the disk receiver, the transfer mechanism of the disk, the lifting / lowering drive mechanism of the reproducing mechanism, etc., a pinion / rack mechanism, a cam mechanism, a pantograph mechanism, a feed screw mechanism and other known means may be used alone or in appropriate combination. Can be configured.

[0057]

As described above, according to the present invention, the transfer amount of the disc from the disc holder to the disc receiver is small within a range that does not hinder the sandwiching of the disc by the turntable and the clamper, that is, the transfer amount L is reduced. It is set to 1/2 or more of (D + d) and less than D, and the information is reproduced when the disc located in the disc reproducing section overlaps with the disc in the disc holder. The dimension in the direction can be significantly reduced.
Also, since the disc is stored in the disc holder directly without using a tray, the height dimension of the disc holder can be greatly reduced, and the disc holder top and bottom for disc selection can be greatly reduced. The amount of movement is small. Therefore, the size and weight of the disc holder can be reduced, and the vertical movement mechanism can be simplified.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a disc reproducing apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a disc receiver and a slide body according to the first embodiment.

FIG. 3 is a sectional view schematically showing a peripheral portion of a disc holder in the first embodiment.

FIG. 4 is a schematic perspective view of a disc holder peripheral portion in the first embodiment.

FIG. 5 is a diagram for explaining a disc transfer amount between a disc holder and a disc receiver.

FIG. 6 is a plan view and a cross-sectional view showing a slide body according to the first embodiment.

FIG. 7 is a plan view showing a schematic configuration of a reproducing mechanism and a driving mechanism in the first embodiment.

FIG. 8 is a side view showing a partial cross-section of the relationship between the reproducing mechanism and the lifting cam in the first embodiment.

FIG. 9 is a perspective view of a reproducing mechanism lifting cam according to the first embodiment.

FIG. 10 is a sectional view schematically showing the drive mechanism in the first embodiment.

FIG. 11 is an explanatory view showing the relationship between the disc receiver and the slide body in the first embodiment.

FIG. 12 is a plan view showing a schematic configuration of the disc reproducing apparatus in the first embodiment.

FIG. 13 is a perspective view showing a schematic configuration of a disc reproducing apparatus according to a second embodiment of the present invention.

FIG. 14 is a perspective view showing a schematic configuration of a disk holder peripheral portion according to a third embodiment of the invention.

[Explanation of symbols]

D: Disc outer diameter, d: Clamping area diameter, L: Disc transfer amount, 2 ... Disc, 3,72 ... Disc receiver, 18,7
1,93 ・ ・ ・ Disk holder, 42,75 ・ ・ ・ Clamper, 46 ・ ・ ・ Optical head, 48 ・ ・ ・ Turntable

Claims (5)

[Claims] 1. A plurality of discs each having an outer diameter D and having a clamping region with a diameter d in the center are coaxially housed directly in a disc holder with a predetermined gap in the axial direction, and one disc is loaded from the disc holder. The information recorded on the disc is optically transferred by moving the disc in a direction orthogonal to the axial direction of the disc and positioning it on the disc receiver of the disc reproducing unit, sandwiching the disc by a turntable and a clamper, and rotating the disc by the turntable. In the disc reproducing apparatus for reproducing the disc, the amount L of movement from the disc holder to the disc receiver in the direction orthogonal to the axial direction of the disc is (D + d)
/ 2 or more and less than D, a disk reproducing device characterized by the above. 2. The disk reproducing apparatus according to claim 1, wherein the disk holder cannot be removed from the apparatus main body.
Further, the disc holder can be raised and lowered in the axial direction of the disc, the clamper can be made to stand by above the disc reproducing portion, and the turntable and the optical head can be raised and lowered in the axial direction of the disc. And a disc reproducing apparatus, which is movable to a disc exchange position different from the disc reproducing section. 3. The disk reproducing apparatus according to claim 1, wherein the disk holder is detachable from the main body of the apparatus. 4. The disk reproducing apparatus according to claim 3, wherein the disk holder is not allowed to move up and down, and the clamper, the turntable and the optical head can be moved up and down according to the height position of the selected disk in the disk holder. A disk reproducing device characterized in that 5. The disk reproducing apparatus according to claim 3, wherein an elevating mechanism is provided in the main body of the apparatus, and the disk holder is detachably attached to the elevating mechanism.