JP2000251374A - Disk recording and/or reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply a disklike recording medium to a disk drive device from two directions so that the disklike recording medium is automatically turned over by arranging the disk drive device in a center hole bored in the center part of a turntable and providing disk conveying means at two places on a diagonal of the turntable. SOLUTION: A disk reproducing device 11 is equipped with the turntable 12 which can longitudinally store many disklike recording media Dn supported rotatably on a main chassis 13 and the disk drive device 14 which reproduces the disklike recording media Dn in the center hole. Disk conveying means 17 which convey the disklike recording media Dn are provided at two places on the diagonal of the turntable 12 between the disk drive device 14 and turntable 12. Consequently, the information recording surfaces Da and Db of a disklike recording medium Dn can automatically and continuously be reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk-shaped recording medium such as a CD (compact disk) in which information signals are recorded on one side and a DVD (digital video disk) in which information signals are recorded on both sides. The present invention relates to a disk recording and / or reproducing apparatus for writing (recording) or reading (reproducing) a signal, and in particular, a disk-shaped recording medium (preferably a large number, for example, 100 to 300) can be stored vertically. The present invention relates to a disc recording and / or reproducing apparatus provided with a turntable for a disc stack.

[0002]

2. Description of the Related Art Conventionally, generally, a CD is placed on a turntable.
A disk recording and / or reproducing apparatus capable of storing a large number of optical disks such as DVDs and DVDs vertically,
For example, the one shown in FIG. 32 is known. FIG. 32 shows 100 optical disks Dn (n = 1 to 100).
1) shows a schematic configuration of a disk reproducing apparatus 1 in which the disk reproducing device 1 can be placed vertically on a turntable 2 when viewed from a plane.

[0003] The disc reproducing apparatus 1 includes a base chassis 3 having a square planar shape. A turntable 2 having a donut-shaped planar shape is supported at a position slightly deviated from the substantially central portion of the base chassis 3 to one side in one diagonal direction so as to be rotatable in the planar direction. The turntable 2 is provided with 100 disk storage portions arranged at equal angular intervals in a circumferential direction. Further, a disk drive device 4 for executing a reproducing operation on the optical disk Dn is arranged at one corner of one diagonal direction of the base chassis 3.

[0004] The disk drive device 4 chucks an optical disk Dn and rotationally drives the optical disk Dn, and transmits an information signal to the optical disk Dn mounted on the disk table 5 and integrally rotated. An optical pickup device 6 and the like for performing reading are provided.
A disk transport means 7 is provided between the disk drive device 4 and the turntable 2. By the operation of the disk transport means 7, any one of the 100 optical disks Dn placed on the turntable 2 can be selected.
The sheets are selectively taken out and transported to the disk drive device 4, or the optical disk Dn mounted on the disk drive device 4 is transported to the turntable 2 side,
The turntable 2 is stored in a predetermined disk storage section.

[0005]

However, in the conventional disk recording and / or reproducing apparatus 1 as described above, an information signal is recorded only on one side, and the information signal can be reproduced on one side. When an optical disc such as a CD is used (hereinafter, referred to as "the former"), if the optical disc is stored in the turntable 2 with its signal recording surface on the opposite side, the disc is conveyed by the disc conveying means 7 and the disc drive is driven. The reproduction operation could not be performed even if the device was mounted on the device 4. Further, when an optical disc such as a DVD capable of reproducing an information signal from both sides or recording an information signal on both sides is used (hereinafter referred to as “the latter”).
That. In (2), recording and / or reproducing operations could not be continuously performed on both sides.

Therefore, in the former case, it is necessary to take out the optical disk from the disk storage portion of the turntable 2 once, turn the left and right sides thereof, and then store the optical disk in the disk storage portion again. In the latter case, when the recording and / or reproducing operation of the information signal is performed on the opposite surface following one surface, the user replaces the left and right surfaces of the optical disk and stores the optical disk in the disk storage unit. , And had to be mounted on the disk mounting section again. Therefore, in the above-mentioned conventional disk reproducing apparatus 1, the essential that a disk changer mechanism provided in such a disk recording and / or reproducing apparatus is "replaceable without touching a disk" is impaired. There was a problem that would be.

As a countermeasure against such a problem, for example, as shown in FIG. 33, it is conceivable to provide dedicated disk drive devices 4a and 4b for each surface of the optical disk. Two disk drive devices 4a, 4b
Is disposed at a position displaced by 90 ° with respect to the rotation center of the turntable 2. The disk tables 5 of the disk drive devices 4a and 4b are installed outward so as to be separated from each other. As described above, the dedicated disk drive device 4 is provided for each surface of the optical disk.
By providing a and 4b, it is possible to reproduce (or record) both sides of the optical disc.

However, the measures for installing two disk drive devices 4a and 4b not only increase the product cost because two disk drive devices 4 are required, but also dispose two disk drive devices 4a. Since it is necessary to secure such a space, there arises a problem that the external dimensions of the entire apparatus become large.

The present invention has been made in view of such a conventional problem, and supplies an optical disk from two diagonal directions to a disk drive so that the disk-shaped recording medium is automatically turned over. It is an object of the present invention to solve the above-mentioned problem by making it possible.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems and the like, and to achieve the above-mentioned object, a first aspect of the present invention is described.
The disc recording and / or reproducing apparatus described above is a turntable capable of storing a disc-shaped recording medium vertically and arranged in a circumferential direction, and a disc on which a disc-shaped recording medium is mounted to record and / or reproduce information signals. A drive device, a disk transport means for transporting a disk-shaped recording medium between the disk drive device and the turntable,
A disk recording and / or reproducing apparatus comprising: a disk drive device disposed in a central hole provided in a central portion of a turntable, and disk transport means provided at two positions on a diagonal line of the turntable. It is characterized by.

According to a second aspect of the present invention, there is provided the disk recording and / or reproducing apparatus, wherein the disk transport means lifts the disk-shaped recording medium from the disk storage portion of the turntable and restricts the movement thereof; And a transport belt that applies a rotational force to the recording medium and rolls along the disk guide to transport the recording medium to the disk mounting portion of the disk drive device.

According to a third aspect of the present invention, there is provided a disk recording and / or reproducing apparatus, wherein the disk guide is formed between a lifting member provided in the center hole of the turntable so as to be able to move up and down, and the lifting member. And a restraining member for restraining the recording medium, wherein the transport belt is attached to the elevating member so as to run.

According to a fourth aspect of the present invention, there is provided a disk recording and / or reproducing apparatus provided with a cam drive mechanism for rotating and driving a pair of disk transport means provided at two locations in conjunction with each other. When one of the disk transport means transports a disk-shaped recording medium, the other disk transport means is kept in a non-transport state.

According to a fifth aspect of the present invention, there is provided a disk recording and / or reproducing apparatus, wherein the disk drive device has a first support frame and a second support frame which are opposed to each other with the disk transport means interposed therebetween. The first support frame is provided with a disk table on which a disk-shaped recording medium is mounted and a pickup device, and the second support frame is provided with a chucking plate for holding the disk-shaped recording medium between the disk table and the disk table. It is characterized by having been provided.

With the above-described structure, in the disk recording and / or reproducing apparatus according to the first aspect of the present invention, the disk is transported to two positions on a diagonal line of the turntable in which the disk drive is disposed in the center hole. Means, one surface (for example, the A surface) of the disk-shaped recording medium is directed to the pickup device by removing the disk-shaped recording medium from the disk storage portion and transporting the disk-shaped recording medium by one disk transporting means. It can be mounted on the disk table in the state. Further, after the turntable is rotated by half while the disk-shaped recording medium is returned to the original disk storage portion, the disk-shaped recording medium is transported by the other disk transport means, so that the disk-shaped recording medium is removed. It can be mounted on the disc table with the other side (for example, side B) facing the pickup device. As a result, the reproducing or recording operation can be performed by automatically making both sides of the disc-shaped recording medium continuous.

In the disk recording and / or reproducing apparatus according to the second aspect of the present invention, since the disk transport means has the disk guide and the transport belt, a large number of the disks are vertically arranged on the turntable and arranged in the circumferential direction. Any one of the disc-shaped recording media can be selected and taken out and transported to the disc mounting unit, or the disc-shaped recording medium after the recording or reproducing operation can be returned from the disc mounting unit to the original disc storage unit. it can.

In the disk recording and / or reproducing apparatus according to the third aspect of the present invention, the disk guide has an elevating member and a restraining member, and the transport belt is attached to the elevating member so as to be able to run. An arbitrary one of a large number of disk-shaped recording media vertically arranged on a table and arranged in a circumferential direction is selected and taken out and transported to a disk mounting portion, or disk-shaped recording after recording or reproducing operation. The operation of returning the medium from the disk mounting section to the original disk storage section can be reliably performed.

In the disk recording and / or reproducing apparatus according to the fourth aspect of the present invention, the operation of the pair of disk transport means is controlled by the cam drive mechanism. , The disk-shaped recording medium can always be transported by only one disk transport means.

In the disk recording and / or reproducing apparatus according to the fifth aspect of the present invention, the first and second support frames are opposed to each other with the disk carrying means interposed therebetween, and the first support frame has a disk table and a pickup. Equipment,
Since the chucking plate is provided on the second support frame, the disk-shaped recording medium transported by the disk transport means can be securely mounted on the disk table at the disk mounting section.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a disk recording and / or reproducing apparatus according to the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an example of the basic configuration of a disk recording and / or reproducing apparatus according to the present invention.
Is a plan view and FIG. 2 is a side view. FIGS. 3 to 31 show a specific configuration of an embodiment of the disc recording and / or reproducing apparatus according to the present invention.
Using an optical disk such as a disk-shaped recording medium,
Many optical disks are stored on the turntable,
A disc stack turn for selecting and taking out one arbitrary optical disc stored in the turntable and reproducing (reading) an information signal recorded on an information recording surface of the optical disc. This is applied to a disk reproducing apparatus having a table.

That is, FIG. 3 shows a disk recording and / or recording system according to the present invention.
4 is a plan view of a disk reproducing apparatus showing an embodiment of the reproducing apparatus, FIG. 4 is an external perspective view of the disk reproducing apparatus with the opening door open, FIG. 5 is a side view of the reproducing apparatus, and FIGS. FIG. 15 to FIG. 20 are explanatory views of the turntable shown in FIG. 6 and the like, respectively, and FIG. 22 is a turntable. FIG. 23 is a plan view of the same, FIG. 24 is an exploded perspective view showing a cam driving mechanism of the disk chucking device, and FIG.
5 is an explanatory view showing a power transmission system of the cam drive mechanism, FIG. 26 is an explanatory view showing a power transmission system of the disk transport means, FIG. 27 is a perspective view showing a disk drive frame supporting the disk drive device, and FIG. FIG. 29 is an exploded perspective view of the disk drive device, FIG. 30 is a side view of the disk drive device, and FIG.

As shown in FIG. 1 and FIG. 2 as an example of a basic configuration, a disc reproducing apparatus 11 according to the disc recording and / or reproducing apparatus of the present invention is an optical disc showing a specific example of a disc-shaped recording medium. For example, a DVD (digital video disk) or the like is used to reproduce (read) information signals recorded on the information recording surfaces Da and Db provided on both sides of the optical disk Dn by using Dn. is there. The disc reproducing apparatus 11 has a large number (for example, 100, 300, etc.) of optical discs D at one time.
The disk drive comprises a turntable 12 for a disk stack capable of storing n vertically and a main chassis 13 rotatably supporting the turntable 12.

The turntable 12 has a donut shape in plan view, and has an optical disc D
n can be stored vertically, for example, 100
A disk storage section 20 is provided at each location. Therefore,
When the optical disks Dn are stored in the respective disk storage units 20, the optical disks Dn are radially arranged around the rotation center of the turntable 12. Such a turntable 12 is supported at a substantially central portion of a rectangular main chassis 13 so as to be rotatable in a plane direction.

In the center hole 12a provided in the center of the turntable 12, a disk drive 14 for executing a reproducing operation on the optical disk Dn is arranged. The disk drive device 14 reads an information signal from a disk table 15 that chucks and drives the optical disk Dn and rotates the optical disk Dn that is mounted on the disk table 15 and integrally rotated. An optical pickup device 16 and the like showing a specific example of the pickup device are provided. The disk table 15 of the disk drive device 14 is integrally attached to a rotating shaft of a spindle motor (not shown) fixed to one longitudinal end of a base chassis 21 forming a frame.

The optical pickup device 16 is configured to be movable in the longitudinal direction with respect to the base chassis 21. That is, the optical pickup device 16 is movably supported by a feed shaft and a guide shaft attached to the base chassis 21 so as to be parallel to each other. And, by moving guided by both axes,
It approaches and separates from the disk table 15. Due to the movement of the optical pickup device 16, the objective lens 16a of the optical head moves in the radial direction along the information recording surface of the optical disk Dn.

A disk transport means 17 for transporting the optical disk Dn is provided between the disk drive device 14 and the turntable 12. The disk transport means 17 includes a transport rail 22 that connects the inner peripheral edge of the turntable 12 in a diagonal direction, a pair of disk ejection levers 23 a and 23 b disposed diagonally outside the transport rail 22, A disk return lever 24 disposed substantially at the center.

A pair of disk ejection levers 23a, 23b
From the lower surface of the turntable 12
It is configured to be able to protrude to zero. Therefore, in each disk storage unit 20 of the turntable 12,
A slit 26 opened radially inward is provided. By letting the disk take-out lever 23a (or 23b) protrude above the turntable 12 through the slit 26, the optical disk Dn stored in the disk storage portion 20 is taken out as shown in FIG. It is placed on the transport rail 22.

The transport rail 22 is a rail member having a guide groove 22a extending diagonally on the upper surface.
The disk drive device 14 is supported by a support frame 18 to which the disk drive device 14 is attached. This support frame 18 is fixed on the main chassis 13. Further, a disc return lever 24 is rotatably attached to the support frame 18. The disc return lever 24 is configured to protrude into the guide groove 22a from a through hole 27 provided in the transport rail 22. This guide groove 22
By rotating the disk return lever 24 in the position a,
Optical disk Dn sent from turntable 12
Is stopped below the disk drive device 14, and
The optical disk Dn sent from the disk drive device 14 can be sent back to the turntable 12.

Further, by raising the disk return lever 24 while the optical disk Dn is mounted, the optical disk Dn can be pushed up by a predetermined amount and transported to the disk mounting portion of the disk drive device 14. Further, after receiving the optical disk Dn at the disk mounting unit and descending to the transport rail 22, the optical disk Dn is pushed out by the rotation force by rotating in a predetermined direction, and the optical disk Dn is stored in a predetermined disk storage unit 20. You can go back.

Reference numeral 25 shown in FIG. 1 is an opening / closing door provided on the front of the disk reproducing device 11. This opening / closing door 25
It is arranged at a substantially central portion of a front panel (not shown), and its lower end is rotatably supported by the front panel by hinge means. The space opened and closed by the opening / closing door 25 is a disk entrance 27 for inserting and removing the optical disk Dn. The disk drive device 14 and the disk transport means 17 are arranged to extend in the front-rear direction at right angles to the opening / closing door 25 that opens and closes the disk entrance 27. In this manner, by allowing one end of the disk transport means 17 to face the disk entrance 27, the turntable 1
The optical disc Dn can be supplied to the disc mounting unit without rotating the disc 2.

According to the disk reproducing apparatus 11 having such a configuration, the optical disk Dn is removed from the disk storage section 20 by operating the first disk removal lever 23a arranged on one side of the turntable 12 in the diagonal direction. As a result, the optical disk Dn is
The guide groove 22a moves to the center of the base chassis 13. When the optical disk Dn reaches a substantially central portion, the optical disk Dn is lifted by the disk return lever 24 and transported to the disk mounting portion of the disk drive device 14.

The optical disk Dn thus transported
Is mounted on the disk table 15 and driven to rotate. Then, one of the information recording surfaces (for example, the A surface Da) of the optical disk Dn is subjected to a reproducing operation by the optical pickup device 16 to reproduce an information signal recorded in advance. Thereafter, when the reproducing operation is completed, the optical disk Dn is released from the disk table 15 and is placed on the disk return lever 24. Then, the disc is returned to the transport rail 22 together with the disc return lever 24, and is sent out by the rotation of the disc return lever 24 and returned to the original disc storage unit 20.

Next, the turntable 12 is rotated by 180 °, and the second disk ejection lever 23b arranged on the other side in the diagonal direction is operated to take out the optical disk Dn from the disk storage section 20. As a result, the optical disk Dn is guided by the guide groove 22a of the transport rail 22 while being turned upside down, and moves to the center of the main chassis 13. Then, as in the case described above, after the optical disk Dn reaches the substantially central portion, the optical disk Dn is lifted by the disk return lever 24 and transported to the disk mounting portion of the disk drive device 14 in the same manner.

As a result, the optical disk Dn is mounted on the disk table 15 with the optical disk Dn turned upside down. In this state, the optical disk Dn is subjected to a reproducing operation by the disk drive device 14, and the other information recording surface (for example, the B surface Db)
Is reproduced in advance. After that, when the reproduction operation is completed, as in the case described above,
The optical disk Dn is released from the disk table 15 and placed on the disk return lever 24. Then, after being returned to the transport rail 22, the disk is returned by the rotation of the disk return lever 24 and is returned to the original disk storage unit 2.
Returned to 0.

Next, a specific embodiment of the disc recording and / or reproducing apparatus according to the present invention will be described with reference to FIGS. This disk reproducing device 31 is shown in FIGS.
As shown in the figure, the turntable 32 and the main chassis 3
3, exterior cover 34, front panel 35, and door 36
And a table support 37 and the like.

The main chassis 33 is formed of a sheet metal frame opened on the top and front surfaces.
The outer cover 34 is fitted on the upper part of the third member 3. The main chassis 33 and the exterior cover 34 are removably fastened at a plurality of locations with fixing screws 38a, which is a specific example of a fastening means, to form a housing with an open front. By attaching the front panel 35 to the front opening of the housing, a housing in which all of the front, rear, left, right, and upper and lower surfaces are enclosed is configured.

At a substantially central portion in the horizontal direction of the front panel 35, a disk entrance 40 for inserting and removing the optical disk Dn is provided. The disk entrance 40 has a substantially rectangular shape, and can be freely opened and closed by an opening / closing door 36. The lower end of the opening / closing door 36 is rotatably supported by the front panel 35 by hinge means. The pivot door 36 is pivoted about the hinge means, and the disc door 40 shown in FIG. 3 is closed and the disc door 40 shown in FIGS. 4 and 5 is opened selectively. it can. Although not shown, operation buttons, operation dials and other switches, a display device such as a liquid crystal monitor, and the like are attached to the front panel 35 as necessary.

At the four corners on the lower surface of the main chassis 33, legs 41 whose height can be adjusted are attached. The table support 37 is fixed on the upper surface of the substantially central portion of the main chassis 33 by fixing means such as fixing screws.
Is attached. The table support 37 is a pointed cylindrical body having a storage hole 37a in the center. The outer peripheral surface of the table support 37 is provided with a curved surface portion 37b formed according to the outer peripheral surface shape of the optical disk Dn to be used. As shown in FIGS. 6 to 14, a positioning shaft 37 c is provided at the center of the lower surface of the table support 37. By fitting this positioning shaft portion 37c into a reference hole of the main chassis 33,
The table support 37 is positioned with respect to the main chassis 33, and the table support 37 is set at a substantially central portion thereof.

At three locations on the skirt portion of the table support 37, inner support rollers 42 for supporting the inner peripheral edge of the turntable 32 from below are provided. As shown in FIG. 3, the three inner support rollers 42 are arranged at equal angular intervals in the circumferential direction. Then, as shown in FIG. 21, the inner support roller 42 is rotatably supported in a horizontal direction by a support pin 37d provided on the table support 37. An outer flange 42 a protruding outward in the radial direction is provided below the outer peripheral edge of the inner support roller 42. On the outer flange 42a of these inner support rollers 42,
An inner peripheral edge of the turntable 32 is placed.

Further, as shown in FIG. 3, a sensor mounting piece 37e protruding outward is provided on the bottom of the table support 37.
Is provided. The sensor attachment piece 37e is provided with a position detection sensor 43a and an address detection sensor 43b for controlling the rotation position of the turntable 32. These detection sensors 43a and 43b will be described later in detail.

The turntable 32 has a donut shape in plan view, and has disk storage portions 45 at 300 locations on its upper surface. The 300 disk storage portions 45 are provided at equal angular intervals in the circumferential direction of the turntable 32, and are arranged radially as a whole. Each disk storage section 45 is formed of a slit-shaped recess. Therefore, the width of each disk storage section 45 is set slightly larger than the thickness of the optical disk Dn to be stored. Then, as shown in FIG.
5 has a concave arc shape corresponding to the outer peripheral edge of the optical disk Dn.

An outer peripheral ring 32a is provided on the outer peripheral edge of the turntable 32 in a circumferential direction. The outer peripheral ring portion 32a is supported from below by six outer support rollers 46 arranged outside the turntable 32. As shown in FIG. 3, the six outer support rollers 46 are arranged at appropriate intervals in the circumferential direction. Each outer support roller 46 is rotatably supported by a roller support member 47. Roller support member 47
Is composed of a bracket having a support pin 47a protruding in the lateral direction, and an outer support roller 46 is rotatably attached to the tip of the support pin 47a. The roller support member 47 is attached to the main chassis 33 by fixing means such as a fixing screw 38b.

Further, inside the outer peripheral ring part 32a of the turntable 32, two annular convex parts 48a, 4 for sensors are provided.
8b are provided concentrically. These annular projections 48
a, 48b, the first annular convex portion 48 located outside
a is provided with 300 slits, the same number as the number of the disk storage portions 45. These 300 slits are provided at equal angular intervals so as to correspond to the disk storage portions 45 of the 300. The above-described position detection sensor 43a corresponding to the first annular convex portion 48a is attached to the sensor attachment piece 37e.

Further, the second annular convex portion 48 located on the inner side
In FIG. 2B, slits are provided in the same number as the number of addresses, each representing an address in which an appropriate number of disk storage units 45 are put together. The number of these addresses can be set as ten addresses by, for example, dividing the 300 disk storage units 45 into ten. The address detection sensor 43b described above corresponding to the second annular projection 48b is attached to the sensor attachment piece 37e. These detection sensors 43
By detecting the position of the turntable 32 at a and 43b, the position of the turntable 32 can be accurately controlled.

Further, as shown in FIG. 21, on the outer peripheral surface of the outer peripheral ring portion 32a of the turntable 32, a table gear 49 that rotates in the circumferential direction is integrally provided.
The table gear 49 is provided with a table rotation drive mechanism 50 for driving the turntable 32 to rotate. As shown in FIGS. 22 and 23, the table rotation drive mechanism 50 includes a table drive motor 51, a gear train 52 having a plurality of gears, a support bracket 53, and the like. The table drive motor 51 includes a support bracket 53
It is placed on top and fixed. The support bracket 53 bent in a crank shape is fixed to the main chassis 33 by a plurality of fixing screws 38c showing a specific example of the fixing means.

Gear train 52 of table rotation drive mechanism 50
Is an output gear 52a, three intermediate gears 52b to 52d each having a large diameter portion and a small diameter portion, and a driving gear 52e.
And The output gear 52a is fixed to the rotating shaft of the table drive motor 51, and the large diameter portion of the first intermediate gear 52b is meshed with the output gear 52a. First
The large-diameter portion of the second intermediate gear 52c meshes with the small-diameter portion of the intermediate gear 52b, and the large-diameter portion of the third intermediate gear 52d meshes with the small-diameter portion of the second intermediate gear 52c. Further, a driving gear 52e is provided on the small diameter portion of the third intermediate gear 52d.
And the drive gear 52e is meshed with the table gear 49. Then, the first to third intermediate gears 52b
To 52d and the drive gear 52e are rotatably supported by four gear shafts 54a to 54d erected on the support bracket 53, respectively.

As shown in FIGS. 3 and 6 to 20, the disk drive device 72 and the disk transport means are provided in the storage hole 37a of the table support 37 inserted into the central hole 32b of the turntable 32. Disk transfer device 56
And are arranged. The disk drive device 72 includes a disk drive frame 57 and upper and lower slide plates 5.
It is supported by the base frame 60 via 8, 59. The disk transport device 56 includes a pair of front and rear transport mechanisms 56a and 56b. The front and rear transport mechanisms 56a and 56b are supported by the plate frame 61 so as to be able to move up and down.

As shown in FIG. 24, the base frame 60
Has an L-shape when viewed from the front, a base portion 60a extending in the lateral direction, and a rising portion provided continuously so as to protrude upward from one side of the base portion 60a. 60b
And These base part 60a and rising part 60b
The base frame 60 is formed as a frame by bordering the periphery of the front side of the base frame 60. A shelf 60c extending in the lateral direction is provided on the upper portion on the rear side of the base 60a. A lower slide plate 59 is slidably mounted on the shelf 60c.

In the frame of the base frame 60, a cam gear train 64 for driving a pair of cam gears 62, 63 to rotate.
And a plurality of gears 65a to 65d constituting a loading gear train 65 for operating a pair of front and rear transport mechanisms 56a, 56b. A cam drive motor 66 and a loading motor 67 as driving sources for generating power for driving the cam gear train 64 and the loading gear train 65 are attached to the rear side of the base frame 60, respectively.

The cam drive motor 66 and the loading motor 67 are arranged side by side at predetermined intervals in the horizontal direction. The rotation axis of each of the motors 66 and 67 is
a and protrudes to the front side of the base frame 60. The output gears 64a and 65a
Are attached. First output gear 64a
And two intermediate gears 64b, 64c and a cam drive gear 64d
A cam gear train 64 is constituted by these. Also, the second output gear 65a and the three intermediate gears 65b, 65c,
65d, a drive gear 65e, and six movable gears 65f, 65
g, 65h, 65i, 65j, 65k and the two belt drive gears 65m, 65n to form a loading gear train 6
5 are configured.

As shown in FIG. 25 and the like, each of the two intermediate gears 64b and 64c of the cam gear train 64 has a large-diameter portion and a small-diameter portion. Output gear 64a is meshed. First intermediate gear 64
The large diameter portion of the second intermediate gear 64c is meshed with the small diameter portion b, and the small diameter portion is meshed with the cam drive gear 64d. The two intermediate gears 64b, 64c and the cam drive gear 64d are rotatably supported by gear support shafts provided on the base portion 60a of the base frame 60 so as to protrude forward.

Each of the two intermediate gears 65b and 65c of the loading gear train 65 has a large diameter portion and a small diameter portion, and the second output gear 65a is connected to the large diameter portion of the first intermediate gear 65b. Are engaged. The large diameter portion of the second intermediate gear 65c meshes with the small diameter portion of the first intermediate gear 65b,
A third intermediate gear 65d is meshed with a small diameter portion of the intermediate gear 65b. Then, the third intermediate gear 65d is meshed with the drive gear 65e.

Further, front and rear first movable gears 65f and 65i are meshed with a driving gear 65e of the loading gear train 65. These front and rear first movable gears 65f, 65f
The power transmission direction is distributed to the front side and the rear side by i. The front second movable gear 6 is attached to the front first movable gear 65f.
5g are meshed, and the rear second movable gear 65j is meshed with the rear first movable gear 65i. Further, a front third movable gear 65h is meshed with the front second movable gear 65g, and a rear third movable gear 65k is meshed with the rear second movable gear 65j. The front third movable gear 65h meshes with the front belt drive gear 65m, and the rear third movable gear 65h
k is meshed with the rear belt drive gear 65n.

The three intermediate gears 65b, 65c, 65d and the driving gear 65e of the loading gear train 65 are rotatable on gear support shafts provided to protrude forward on the base portion 60a of the base frame 60. It is supported by. Further, as shown in FIG. 26 and the like, one ends of a pair of first connection plates 68a and 68c are rotatably connected to a gear support shaft that supports the drive gear 65e.

The front first connecting plate 68a extends to the front side, and the front first movable gear 65f
Are rotatably supported. One end of the front second connection plate 68b is rotatably connected to the other end of the front first connection plate 68a together with the front second movable gear 65g. A front third movable gear 65h is rotatably supported at a middle portion in the longitudinal direction of the front second connection plate 68b. And the other end of the front second connection plate 68b is
The front belt drive gear 65m is rotatably supported by a support shaft that rotatably supports the front belt drive gear 65m.

The rear first connecting plate 68c extends rearward, and is provided with a rear first movable gear 65i at an intermediate portion in the longitudinal direction.
Are rotatably supported. Thereafter, one end of the rear second connection plate 68d is rotatably connected to the other end of the first connection plate 68c together with the rear second movable gear 65j. A rear third movable gear 65k is rotatably supported at a middle portion in the longitudinal direction of the rear second connection plate 68d. And the other end of the rear second connection plate 68d is
The rear belt drive gear 65n is rotatably supported by a support shaft that rotatably supports the rear belt drive gear 65n.

The cam drive gear 64 of the cam gear train 64
A pair of cam gears 62 and 63 are meshed with d. Therefore, the pair of cam gears 62 and 63 are driven to rotate in the same direction according to the rotation direction of the cam drive gear 64d. The pair of cam gears 62 and 63 are disposed at symmetrical positions, and are rotatably supported by support shafts 69a and 69b provided to protrude forward in the base 60a. And a pair of cam gears 6
2 and 63 are prevented from being removed by a set screw 38d screwed and fixed to the support shafts 69a and 69b.

Each of the cam gears 62 and 63 has a disk-shaped gear portion 62a, 63a, and a gear portion 62a, 63a.
Cam part 62 provided so as to protrude from one surface of 63a
b, 63b. The cam portions 62b and 63b of both cam gears 62 and 63 are symmetrical in shape, and spiral cam surfaces 62c and 63c are provided on the outer peripheral surfaces thereof. Guide pins of a disk transport device to be described later are in sliding contact with these cam surfaces 62c and 63c. Therefore, the front and rear disk transport devices are provided with the cam surfaces 62.
It is reciprocated in the vertical direction by the amount of displacement (stroke) in the radial direction of c and 63c.

As shown in FIGS. 6 and 24, a cam groove 70 which is continuous in the circumferential direction is provided on the surface of the first cam gear 62 opposite to the cam portion 62b. The cam groove 70 has a circumferential cam portion 70a set in a radially inner portion over a range of approximately 180 °, and a radial cam portion 70a extending outward from one end of the circumferential cam portion 70a in the radial direction. And a displacement cam portion 70b having a curve returning to the inner peripheral portion. The maximum displacement portion of the displacement cam portion 70b is the cam portion 6
The angle is set so as to be substantially 90 ° with the step portion 2b.
A cam follower pin 71a is slidably engaged with the cam groove 70 of the first cam gear 62.

The cam copying pin 71a is connected to the swing lever 7
One end is provided so as to protrude forward. The swing lever 71 extends in the up-down direction, and is rotatably supported on the rising portion 60b of the base frame 60 by a mounting means such as a mounting screw 38e at a middle portion in the longitudinal direction. An upper engaging hole 71b is provided at the upper end of the swing lever 71. Further, the swing lever 71
A lower engaging hole 71c extending in the longitudinal direction is provided between the cam copying pin 71a and the mounting screw 38e. Then, the rising portion 6 is made to correspond to the upper and lower engaging holes 71b, 71c.
0b is provided with through holes 60d and 60e, respectively, extending in the lateral direction.

An upper engaging pin 58a provided on the upper slide plate 58 is inserted into the upper through hole 60d. The upper engagement pin 58a is rotatably engaged with the upper engagement hole 71b of the swing lever 71. A lower engagement pin 59a provided on the lower slide plate 59 is inserted into the lower through hole 60e. The lower engagement pin 59a is rotatably engaged with the lower engagement hole 71c of the swing lever 71. This swing lever 7
By the swing of 1, the upper engagement pin 58a is guided in the upper through hole 60d and moves in the lateral direction. Swing lever 71
Swing, the lower engagement pin 59a is guided by the lower through hole 60e, and moves in the lateral direction opposite to the upper engagement pin 58a.

The lower slide plate 59 is connected to the base frame 60.
Is slidably mounted on the shelf 60c. The lower slide plate 59 is formed of an elongated plate material, and a lower engagement pin 59a is provided on a rising piece 59b provided at one end in the longitudinal direction so that a lower engagement pin 59a projects forward. Lower slide plate 59
Is provided with a pair of lower guide grooves 59c, 59c at predetermined intervals in the longitudinal direction. Lower guide groove 59c
Has a parallel portion provided on one side in the width direction, and an inclined portion which is continuous with an end near the lower engagement pin 59a of the parallel portion and extends obliquely. The pair of lower guide grooves 57c, 59c provided on the lower end surface of the disk drive frame 57 are fitted in the pair of lower guide grooves 59c, 59c.
b is slidably engaged.

The disk drive frame 57 is the same as that shown in FIG.
As shown in (1), the upper portion is formed of a screen-like member having a large width. This disk drive frame 57
A pair of upper guide pins 57a is provided on the upper end surface of the pair, and a pair of lower guide pins 57a is formed on the lower end surface thereof.
b is provided. A drive unit 72, which is a specific example of a disk drive device, is provided at three locations, that is, the upper portion and the left and right sides of the front surface of the disk drive frame 57.
A unit support portion 57c for supporting the unit is provided. The drive unit 72 is elastically supported by the disk drive frame 57 via three insulators 73 abutting on these unit support portions 57c.
As shown in FIG. 28, the insulator 73 is formed in a gourd shape by a rubber-like elastic body such as rubber or plastic.

An upper slide plate 58 is slidably mounted on the disk drive frame 57. The upper slide plate 58 is also formed of an elongated plate material, and a rising piece 58b provided at one end in the longitudinal direction thereof has an upper engagement pin 5
8a is provided so as to protrude forward. The upper slide plate 58 is provided with a pair of upper guide grooves 58c, 58c at predetermined intervals in the longitudinal direction.
Each upper guide groove 58c has a parallel portion provided on one side in the width direction, and an inclined portion which is continuous with an end portion of the parallel portion remote from the upper engagement pin 58a and which extends obliquely. are doing. Three pairs of upper guide pins 57a to 57a provided on the upper end surface of the disk drive frame 57 are slidably engaged with the pair of upper guide grooves 58c to 58c, respectively.

The parallel portion of the upper guide groove 58c and the parallel portion of the lower guide groove 59c are set so as to coincide with each other on their extension lines. Also, the upper guide groove 5
The inclined portion 8c and the inclined portion of the lower guide groove 59c cross each other.

Thus, when the swing lever 71 is tilted to the right as shown in FIG.
7a and 57b are located at the tips of the inclined portions of the upper and lower guide grooves 58c and 59c. Therefore, the disk drive frame 57 is located at the retracted position away from the plate frame 61. At this time, the disk table of the drive unit 72 is in a non-chucking state.
On the other hand, when the swing lever 71 is tilted leftward as shown in FIG. 7, the upper and lower guide pins 57a, 57
7b are located in parallel portions of the upper and lower guide grooves 58c and 59c. Therefore, the disk drive frame 57 is located at the forward position closer to the plate frame 61. At this time, the disk table is in a chucking state.

The drive unit 72 attached to the disk drive frame 57 which is moved forward and backward in this way.
Has a configuration as shown in FIGS. That is, the drive unit 72 is provided with a disk table 74 on which the optical disk Dn used for reproducing the information signal is mounted.
Chassis rotatably supporting the optical disc Dn mounted on the disc table 74, and a pickup chassis movably supporting an optical pickup device 76, which is a specific example of a pickup device for reading an information signal from the optical disc Dn. 77 and the like. The spindle chassis 75 and the pickup chassis 77 constitute a base chassis.

As shown in FIG. 29, the spindle chassis 75 is formed of a frame-like member having a front piece 75a, left and right side pieces 75b and 75c, and a rear piece 75d.
Only 5a is set to be approximately twice as high as the other pieces. Supporting portions for supporting the insulator 73 are provided at a total of three places, one corner of the front piece 75a, the front end of the side piece 75b located on the opposite side, and the approximate center of the rear piece 75d. 75e is provided. The support portion 75e has a claw shape having a flat C-shape, and the constricted portion of the insulator 73 is inserted into the support portion 75e. Then, a fixing screw (not shown) is inserted from above into the insulator 73.
The drive unit 72 is elastically supported by the disk drive frame 57 via the three insulators 73 by screwing the screw portion at the tip into a screw hole provided in the unit support portion 57c.

The front piece 7 of the spindle chassis 75
5a is provided with a motor mounting seat 75f by expanding a part thereof upward. A spindle motor 78 is mounted inside the motor mounting seat 75f, and is integrally fixed by a plurality of fixing screws 38f. The rotating shaft 7 of the spindle motor 78
8a protrudes above the spindle chassis 75 through a through hole 75g of the motor mounting seat 75f. An offset washer 78b is provided in the middle of the rotating shaft 78a.
Are fitted and fixed. And the offset washer 7
A disk table 74 is fitted and fixed to the upper part of 8b.

The disk table 74 has a mounting portion 74 on which the periphery of the center hole Dc of the optical disk Dn is mounted.
a and a fitting portion 74b fitted into the center hole Dc are integrally formed. Disk table 7
4 is provided with a center hole Dc of the optical disc Dn.
It has a disk shape with a slightly larger diameter. A fitting portion 74b is provided at the center of the mounting portion 74a so as to protrude toward one surface thereof. This fitting portion 74
The height of b is set to be slightly larger than the thickness of the optical disk Dn.

The fitting portion 74b of the disk table 74
Has a tapered substantially conical shape, and a ring-shaped concave portion is formed by providing a boss portion 74c at the center. The spindle motor 7 is provided in the hole of the boss 74c.
The disk table 74 is fixed by a fixing means such as press-fitting, and is integrated in the rotation direction. A yoke plate 74d and a magnet 74e, also in the form of a ring, are provided in the recess of the fitting portion 74b.
And are stored. Further, the outer peripheral portion of the fitting portion 74b
It is composed of a plurality of fixing pieces 74f radially arranged around the boss 74c and a plurality of elastic pieces 74g similarly arranged radially and interposed between adjacent fixing pieces 74f.

The fixed piece 74f and the elastic piece 74g are
They are alternately arranged at predetermined angular intervals in the circumferential direction. Each fixing piece 74f is configured to have a sufficient thickness to secure an appropriate rigidity and to reliably guide the center hole Dc of the optical disc Dn. On the other hand, the elastic piece 74g has an end on the mounting portion 74a side as a free end, and has a moderately thin thickness to have elasticity.
The free end of the elastic piece 74g is pressed against the inner peripheral surface of the center hole Dc at a plurality of positions, thereby positioning the optical disk Dn. Reference numeral 79a shown in FIG. 29 is an offset spring that regulates movement of the rotating shaft 78a in the axial direction. The offset spring 79a is set so as to cross the motor mounting seat 75f, and an intermediate portion thereof is engaged with the offset washer 78b, and both ends thereof are locked by the motor mounting seat 78f.

A tilt motor 80 is mounted inside the motor mounting seat 78f so as to be aligned with the spindle motor 78. The tilt motor 80 has a fixing screw 3
It is tightened and fixed at 8 g to be integrated. The rotation shaft 80a of the tilt motor 80 is connected to the hole 7 of the motor mounting seat 75f.
5h, and protrudes above the spindle chassis 75. A tilt gear 80b is fitted and fixed to a rotation shaft 80a of the tilt motor 80. The gear 81a of the tilt cam 81 is meshed with the tilt gear 80b. The tilt cam 81 is rotatably supported by a support shaft 75i provided upright on the upper surface of the front piece 75a. A spirally extending cam surface 81b is provided on the upper surface of the tilt cam 81, and the pickup chassis 77 swings up and down by a stroke in the height direction of the cam surface 81b.

The side piece 7 of the spindle chassis 75
5b, 75c and the rear surface piece 75d are formed such that their cross-sectional shapes are L-shaped over substantially the entire length in the longitudinal direction.
5 to increase the rigidity of the whole. Further, a pair of bearing portions 75j, 75k are provided in a substantially central portion in the longitudinal direction of the both side pieces 75b, 75c so as to project in the lateral direction. These first and second bearing portions 75j, 75k include:
A pair of shaft portions 77 provided on the pickup chassis 77
e and 77f are rotatably held.

The first bearing portion 75j is formed of a box-shaped casing which projects greatly outward and is opened on the upper surface, and a V-shaped bearing surface 75l is provided in the casing. On the upper surface of the first bearing portion 75j, a positioning pin 75m for positioning and a screw hole 75n are provided. On the bearing surface 75l of the first bearing portion 75j,
One shaft portion 77e of the pickup chassis 77 is mounted. By pressing the shaft portion 77e from above with the pressing piece 79b, the shaft portion 77e is prevented from coming off. The holding piece 79b is fixed to the first bearing 7 by the fixing screw 38h.
5j.

The second bearing 75k has a gate-shaped frame projecting slightly outward, and has a V-shaped bearing surface 75o provided inside. The other shaft portion 77f of the pickup chassis 77 is mounted on the bearing surface 75o of the second bearing portion 75k. By inserting the shaft 77f between the bearing surface 77a and the frame, the shaft 7
7f is rotatably supported while being retained.

The pickup chassis 77 is formed in substantially the same size so that the shape seen from a plane is substantially the same as the shape of the spindle chassis 75 except for the front piece 75a. That is, the pickup chassis 77 is disposed behind the front piece 75a of the spindle chassis 75,
It is formed of a frame-shaped member having a front piece 77a adjacent to the front piece 75a, a pair of side pieces 77b and 77c facing left and right, and a rear piece 77d connected to the rear. An opening 77g through which the optical head 82 of the optical pickup device 76 penetrates inside these frame members.
Is provided.

The front piece 7 of the pickup chassis 77
Side piece 77b, 77c and rear piece 77d excluding 7a
Is formed such that its cross-sectional shape is L-shaped over substantially the entire length in the longitudinal direction. With such a cross-sectional shape, the rigidity of the entire pickup chassis 77 is increased. The height of the side pieces 77b, 77c and the rear piece 77d is set to be substantially the same as the height of the side piece 75b of the spindle chassis 75 and the like. Therefore, by stacking the pickup chassis 77 at a predetermined position on the spindle chassis 75, the height of this overlapping portion is substantially the same as the height of the front piece 75a of the spindle chassis 75.

On the other hand, the front piece 77a of the pickup chassis 77 is formed in a plate shape so that the left and right side pieces 77b and 77c are connected only by the upper surface. The upper surface of the front piece 77a has an inclined surface with one side piece 77b side lowered so as to be inclined in the lateral direction, which is the extending direction. Thus, the front piece 7 of the pickup chassis 77
By providing the inclined surface on 7a, the number of parts can be reduced as compared with the conventional drive unit, and the assembling work can be improved to facilitate the assembling work.

As shown in FIG. 29, a positioning projection 7 is provided on the upper surface of the rear piece 77d of the pickup chassis 77.
7h are provided. The light-shielding plate 79c is fastened and fixed to the rear piece 77d by the fixing screw 38i by the positioning protrusion 77h. This light shielding plate 79c has a substantially L-shaped cross section.
It is shaped like a letter, and covers the upper part of the optical head 82 of the optical pickup device 76 that has moved to the outermost side, particularly, the objective lens 82a.

Further, an insertion hole 77i is provided at the front end of one side piece 77b of the pickup chassis 77. A bearing 77j is provided at the rear end of the side piece 77b corresponding to the insertion hole 77i. A bearing member provided on the feed motor 83 is fitted into the front insertion hole 77i. Then, the feed shaft 83a inserted through the insertion hole 77i
Is rotatably supported by a bearing 77j.
The feed shaft 83a is a rotation shaft of the feed motor 83. A spiral screw groove is formed on the outer peripheral surface of the feed shaft 83a, and the feed shaft 83a itself constitutes a rotor of the feed motor 83. The feed motor 83 is fixed to the front edge of the side piece 77b so as to protrude forward of the pickup chassis 77 by fastening a bracket 83b, which is a fixed portion, with two fixing screws 38j.

A guide shaft 83d is mounted inside the other side piece 77c of the pickup chassis 77 so as to be parallel to the feed shaft 83a. for that reason,
A pair of insertion holes 77 is provided at the front edge and the rear edge of the side piece 77c.
k is provided. The guide shaft 83d is supported by the pickup chassis 77 at both ends by press-fitting both ends into these insertion holes 77k.

The optical pickup device 76 movably supported by the feed shaft 83a and the guide shaft 83d.
Can be moved toward and away from the disk table 74 by being guided by both shafts 83c and 83d. The optical pickup device 76 has a slide member 84 on which an optical head 82 is mounted. This slide member 8
4 is provided with a bearing hole 84a, and a feed shaft 83a is slidably inserted into the bearing hole 84a.
A slide rack 85 is attached to the lower surface of the slide member 84.

The sliding rack 85 has a rack portion 85a meshed with the screw groove of the feed shaft 83a, and a support piece 85b for elastically supporting the rack portion 85a. The sliding rack 85 is fixed to the slide member 84 by tightening the support piece 85b with the fixing screw 38m. Further, a bearing portion 84b is provided on a side of the slide member 84 opposite to the bearing hole 84a, and a guide shaft 83d is slidably inserted in the bearing portion 84b. This feed shaft 8
The 3a, the feed motor 83 and the sliding rack 85 constitute a head feed mechanism for moving the optical pickup device 76.

The optical head 82 of the optical pickup device 76 has a two-axis actuator that can independently move the objective lens 82a in the focus direction (vertical direction) and the tracking direction (lateral direction). This 2
Electromagnetic force is exclusively used as the driving force of the shaft actuator, and in this embodiment, a leaf spring type two-axis actuator classified as a difference in the method of supporting the movable portion is employed. However, it is a matter of course that other types of wire supporting system, hinge system, shaft sliding system and the like can be applied as the biaxial actuator.

Further, a cam piece 77m protruding toward the tilt cam 81 is provided at the upper front edge of the other side piece 77c of the pickup chassis 77. This cam piece 77
The free end of a leaf spring 79d is pressed against m, and the cam piece 77m is urged by the spring force of the leaf spring 79d,
It is in pressure contact with the cam surface 81b of the tilt cam 81 located below. The fixed end of the leaf spring 79d is fixed to the front piece 75a of the spindle chassis 75 by a fixing screw 38k.
It is fastened and fixed to the upper surface of.

Reference numeral 86 shown in FIG. 29 is a biaxial cover that covers the biaxial actuator. This two-axis cover 86
Has an opening window 86 for exposing the objective lens 82a.
a is provided.

Further, a plate frame 61 opposed to and substantially parallel to the base frame 60 at a predetermined interval is provided.
Has the following configuration. That is, the plate frame 61 is made of a screen-shaped member having a square front shape, and the four sides are bent in the same direction to form an upper surface piece 61a, a lower surface piece 61b, and left and right side pieces 61c, 61d.
Are formed. An optical disk D is provided between the disk table 74 and a substantially central portion of the base frame 60.
chucking plate 8 for holding and chucking n
There is provided an opening window 61e through which the window 7 is put in and out.

The chucking plate 87 includes a disk holding plate 87a, a yoke plate 87b, and a yoke holding plate 87c each having a disk shape. Disc holding plate 87
a is in contact with a non-recording area provided at the peripheral edge of the center hole Dc of the optical disc Dn. This disc holding plate 8
A cylindrical portion is provided on the inner peripheral edge of 7a, and engagement holes are opened at three locations on the inner peripheral edge. Three leg pieces 87 provided on the yoke pressing plate 87c are provided in these engagement holes.
d is engaged. The three leg pieces 87d are arranged on an arc so that the circumscribed circle forms a part of the circumference. Inside these three leg pieces 87d, a yoke plate 87b made of an iron plate or the like attracted by a magnet 74e built in the disk table 74 is housed.

The chucking plate 87 is attached to the chucking lever 88, and is inserted into and out of the opening window 61e by the elastic deformation of the chucking lever 88. The chucking lever 88 has a lever main body 88a to which the chucking plate 87 is attached, and an elastic body 88b that elastically supports the lever main body 88a on the plate frame 61. The elastic body 88b has a lever-side connecting piece 88c and a frame-side connecting piece 88d extending in parallel with each other.

By fixing the free end of the lever-side connecting piece 88c to an intermediate portion in the longitudinal direction of the lever main body 88a by a fixing means such as caulking, the elastic body 88b is connected to the lever main body 88.
a. Then, the frame side connecting piece 88
The free end of d is fixed to the plate frame 6 by a fixing means such as caulking.
1, the chucking lever 88 is elastically supported by the plate frame 61. One end of the chucking lever 88 is provided with a disc holding plate 87a.
The chucking plate 87 is attached so that the chucking plate 87 is sandwiched from both sides by the yoke pressing plate 87c. The chucking plate 87 is attached to the chucking lever 88 with a predetermined gap provided therebetween, and is configured to be displaceable by a predetermined amount in a plane direction and a vertical direction perpendicular thereto.

The other end of the chucking lever 88 protrudes upward through an opening 61f provided in the upper surface piece 61a. By operating the upper protruding portion of the chucking lever 88, the chucking plate 87 is opened.
1e. In addition, the upper surface piece 61
A is provided with a positioning pin 61g for positioning.

Guide holes 61 h, which extend in the vertical direction, are provided at the four corners of the plate
61i are provided. Further, left and right openings 61j, 61j are provided diagonally above the lower guide hole 61i. In the middle of the upper and lower guide holes 61h and 61i, left and right first spring support pieces 61k and 61k formed by folding out a part of the plate frame 61 are provided.
Is provided. Also, left and right side pieces 61c, 61d
Are provided with support pins 89 projecting sideways. The left and right support pins 89, 89 are set at substantially the center in the vertical direction. Above and below each support pin 89, a stopper support piece 61m and a second spring support piece 61n connected to the side pieces 61c and 61d are provided, respectively.

A pair of lift plates 90a and 90b are arranged on both sides of the front surface of the plate frame 61. Each lift plate 90a, 90b has a rail support portion 91a having an L-shaped cross section, and a rising portion 91b provided continuously in a direction intersecting the longitudinal direction of the rail support portion 91a. ing. An upper guide pin 91c is provided at the upper portion of the rising portion 91b, and a lower guide pin 91d is provided at the lower portion. These upper and lower guide pins 91c and 91d protrude toward the plate frame 61 side. The upper guide pin 91c is slidably inserted into the upper guide hole 61h of the plate frame 61, and the lower guide pin 91d is slidably inserted into the lower guide hole 61i. The guide pins 91c and 91d are guided by the guide holes 61h and 61i, so that the pair of lift plates 90a and 90b can move up and down.

Further, a spring support piece 91e disposed inside is provided on the rising portion 91b of the lift plates 90a and 90b.
And a stopper regulating piece 91f arranged on the outside. The spring support piece 91e is provided below the rising portion 91b, and is provided in the opening 61j of the plate frame 61.
Has been inserted. One end of a coil spring 92a, which is a specific example of an elastic body, is locked to the spring support piece 91e, and the other end is a first spring support piece 61k of the plate frame 61.
It is locked to. The lift plates 90a and 90b are constantly urged upward by the spring force of the coil spring 92a.

Further, a disc stopper 93 is rotatably supported on each support pin 89 of the plate frame 61. The disc stopper 93 is formed of an arm-shaped member having a boss at one end. The other end of the disk stopper 93 is provided with a stopper portion 93a that protrudes on the transport trajectory of the optical disk Dn and prevents the optical disk Dn from moving. The boss portion of the disc stopper 93 has a rotating operation portion 93 b and a spring receiving piece 9.
3c is provided. The stopper portion 93a protrudes in a direction intersecting the direction in which the disk stopper 93 extends, and the rotation operation portion 93b also protrudes in the same direction.
As a result, the rotation operation portion 93b projects on the movement trajectory of the lift plates 90a and 90b.

The spring receiving piece 93c of the disc stopper 93
Protrudes to the side opposite to the rotating operation portion 93b, and one end of a coil spring 92b, which is a specific example of an elastic body, is locked. The other end of the coil spring 92b is connected to the plate frame 61.
Of the second spring support piece 61n. Due to the spring force of the coil spring 92b, each disk stopper 93,
93 is always urged to rotate backward. The rearward rotation of each disk stopper 93 is prevented by the stopper support piece 61m.

A movable guide rail 94, which is a specific example of an elevating member, is attached to the rail supporting portions 91a of the lift plates 90a, 90b by fixing means such as fixing screws 38n. Movable guide rail 9
Reference numeral 4 denotes a prism-shaped member having an appropriate length, width and thickness. At one end in the longitudinal direction of the movable guide rail 94, a disk lifting portion 94a for lifting the optical disk Dn stored in the disk storage portion 45 of the turntable 32 is provided. Disk lifting unit 94
The width of “a” is set slightly larger than the width of the optical disk Dn. The upper half of the disk lifting portion 94a is a slanted surface with a slanted upper surface.

A toothed pulley 95a having teeth on the outer peripheral surface is rotatably supported by a support shaft 95b at the distal end of the disk lifting portion 94a. One end of a conveyor belt 95c formed of, for example, a timing belt is stretched over the toothed pulley 95a. The width of the transport belt 95c is set to substantially the same as the thickness of the optical disk Dn to be transported. This conveyor belt 95c
Is also bridged over a toothed pulley 95d. The toothed pulley 95 d is
Is rotatably supported by a cam pin 95e at the other end in the longitudinal direction. The movable guide rails 94 are provided on the movable guide rails 94 so that the transport belt 9
There is provided a belt escape groove 94b through which the belt 5c can pass.

Thus, the front transport mechanism 56a is constituted by the movable guide rail 94 mounted on the front lift plate 90a disposed on the front side of the main chassis 33, the transport belt 95c, and the like. Also, the main chassis 33
The rear transport mechanism 56b is configured by the movable guide rail 94 mounted on the rear lift plate 90b disposed on the rear side, the transport belt 95c, and the like.

The cam pins 95e of the front transport mechanism 56a
Is in contact with the cam portion 63b of the second cam gear 63 of the cam drive mechanism described above. When the front lift plate 90a is urged upward by the coil spring 92a,
The cam pin 95e is connected to the cam surface 63 of the second cam gear 63.
c is pressed from below. Therefore, the front lift plate 9
0a is moved up and down following the cam surface 63c. on the other hand,
The cam pin 95e of the rear transport mechanism 56b contacts the cam portion 62b of the first cam gear 62. When the rear lift plate 90b is urged upward by the coil spring 92a, the cam pin 95e is moved to the first cam gear 62.
Is pressed from below onto the cam surface 62c. Therefore, the rear lift plate 90b moves up and down following the cam surface 62c.

Above the base plate 60 and the plate frame 61 having the above-described configuration, an upper guide rail 96 is provided, which is a specific example of a restraining member that restrains the movement of the optical disk Dn. 3 and 5
As shown in FIG. 20, the upper guide rail 96 is a plate-shaped member that extends rearward from above the base plate 60 and the plate frame 61 and reaches near the rear surface of the exterior cover 34.

A guide groove 96a extending in the front-rear direction is provided substantially in the center of the lower surface of the upper guide rail 96. During transport, the optical disc Dn is inserted into the guide groove 96a from below. The optical disc Dn is sandwiched between the guide groove 96a and the transport belt 95c from above and below.
Is transported forward or backward. Therefore, the guide groove 96
It is preferable to lay rubber or soft plastic or the like that can softly support the peripheral edge of the optical disk Dn at the bottom of a.

Further, a rear guide piece 96b is provided on the rear surface of the outer cover 34 in order to restrain the movement of the optical disk Dn lifted by the movable guide rail 94. The rear guide piece 96b prevents the optical disc Dn lifted by the movable guide rail 94 of the rear transport mechanism 56b from moving rearward. Similarly,
A front guide piece 96c is provided on the back of the door 36. By the front guide piece 96c, the front transport mechanism 5
The optical disc Dn lifted by the movable guide rail 94 of 6a is prevented from moving to the front side.

The main chassis 33, the outer cover 34, the plate frame 61 and the lift plate 9
As the material of Oa and 90b, for example, a stainless steel plate or other metal plate material can be used, but a synthetic resin can also be used. In addition, turntable 32,
Front panel 35, door 36, table support 3
7, disk drive frame 57, base frame 6
As the material of the slide plates 58, 59 and the upper guide rail 96, for example, an ABS resin or other synthetic resin can be used, but an aluminum alloy or other metal material can also be used.

The reference numeral 35 shown in FIGS.
a is a tunnel unit provided integrally with the front panel 35. The tunnel portion 35 a is formed to be curved so as to be continuous with the upper portion of the table support 37.

The disc reproducing apparatus 31 having such a configuration can be used, for example, as follows.
As a result, the disk storage unit 45 on the turntable 32
A desired optical disk Dn is selected from among a large number of optical disks Dn placed on the optical disk Dn, and information signals recorded on information recording surfaces provided on both sides of the optical disk Dn are continuously reproduced, Alternatively, an information signal recorded on an information recording surface provided only on one side of the optical disc Dn can be reproduced.

First, as shown in FIG. 4, the opening / closing door 36 is opened to open the disk entrance 40, and the turntable 32 is opened.
A suitable number of optical disks Dn are stored in an arbitrary one of the many disk storage units 45 provided in the above. The turntable 32 is provided with 300 disk storage units 45, and each disk storage unit 45
Can store optical disks Dn one by one. Therefore, in the present embodiment, a maximum of 300
One optical disk Dn can be stored. Incidentally, the size of the optical disk Dn used is generally 1 diameter.
This is a 2 cm disk-shaped recording medium. However, an optical disc Dn having a diameter of 8 cm can be used by using an adapter.

Each disk storage section 4 of the turntable 32
The operation of storing the optical disk Dn in the device 5 is performed by the user. When the disk door 40 is opened by pulling the door 36 forward, the front portion of the turntable 32 is exposed. In this state, the optical disc Dn
Is inserted vertically into the disk entrance 40 and stored in an arbitrary disk storage part 45. At this time, a unique position number (from 1 to 300 in this embodiment) and an address number (from 1 to 10 in this embodiment) are assigned to each disk storage unit 45. ,
It is preferable to record information on the stored optical disk Dn in the control device in association with the position number and the address number.

When storing a plurality of optical discs Dn, the turntable 32 is moved in an arbitrary direction by operating input means (for example, operation dials, operation buttons, etc.) provided on the front surface of the front panel 35 or the like. Rotate to.
Then, the optical disk Dn is stored in the empty disk storage section 45. When the optical disk Dn is stored in the disk storage section 45 of the turntable 32 in this manner,
Each of the optical disks Dn is placed on the turntable 32 in a state of standing substantially vertically. Thereby, an arbitrary optical disc Dn can be selected and automatically played.

The operation of reproducing the optical disk Dn includes a disk loading step and a disk chucking step. In the disk loading step, the optical disk Dn is taken out of the disk storage section 45 and transported to the disk mounting section, or the optical disk Dn is returned from the disk mounting section to the disk storage section 45. This disc loading step can be performed from the rear side of the disc reproducing device 31 or can be performed from the front side. The relationship between the rear loading and the front loading can be set arbitrarily. In this embodiment, an example will be described in which the rear loading is prioritized and the front loading is performed after the rear loading. In the disc chucking step, the optical disc Dn conveyed to the disc mounting unit is chucked on the disc table 74 and the chucking is released.

FIGS. 6 and 15 show the initial state of the disk reproducing apparatus 31, from which the loading of the optical disk Dn is started. In the initial state of the disk reproducing apparatus 31, as shown in FIG.
Is at the lower end. At this time, the disk lifting portion 94a provided at the tip of the movable guide rail 94 is
The optical disk Dn stored in the disk storage section 45 of the turntable 32 is located slightly below.
Assuming that the distance from the upper end of the disk lifting portion 94a to the guide groove 96a of the upper guide rail 96 is H1, the distance H1 is slightly larger than the diameter S of the optical disk Dn (H1> S).

Further, the pair of cam gears 62, 63 are in a state where both step portions 62d, 63d of the cam portions 62b, 63b face upward. Therefore, the position of the largest displacement of the first cam gear 62 in the cam groove 70 is located on the side away from the other cam gear 63. As a result, FIG.
As shown in FIG. 5, the disk drive frame 57 is in a state of protruding forward. Therefore, the disk table 74 approaches the plate frame 61, and the chucking plate 87 is mounted on the disk table 74.

In this state, after the power is input, the position number of the disk storage unit 45 is selected to select a desired optical disk Dn, and the reproduction start switch is operated. Thereby, the turntable 32 is rotated to a predetermined position through the operation of the table rotation drive mechanism 50 shown in FIGS.

That is, when the reproduction start switch is operated, electric power is supplied to the table drive motor 51 of the table rotation drive mechanism 50. Therefore, the torque of the rotating shaft of the table drive motor 51 is transmitted from the output gear 52a to the large diameter portion of the first intermediate gear 52b, and the transmission force is transmitted from the small diameter portion to the large diameter portion of the second intermediate gear 52c. Is done. The torque is transmitted from the small diameter portion of the second intermediate gear 52c to the large diameter portion of the third intermediate gear 52d, and the transmission force is transmitted from the small diameter portion to the large diameter portion of the third intermediate gear 52d. Then, the power is transmitted from the small diameter portion of the third intermediate gear 52d to the table gear 49 of the turntable 32.

As a result, the turntable 32 is driven to rotate about the table support 37. At this time, the inner periphery of the turntable 32 is supported at three places by the inner support rollers 42, and the outer periphery is supported at six places by the outer support rollers 46. Therefore, the turntable 32 is reliably rotated by the operation of the table rotation drive mechanism 50. Further, since the rotation position of the turntable 32 is detected by the position detection sensor 43a and the address detection sensor 43b, the rotation position of the turntable 32 can be accurately controlled.

Next, when the turntable 32 is rotated to a predetermined position and the disk storage unit 45 of the position number selected by the user moves to the rear loading position, whether the optical disk Dn is present in the disk storage unit 45 or not. Is detected by a disk detection sensor (not shown). This disc detection sensor is configured by, for example, arranging a light emitting element and a light receiving element vertically above and below a rear loading position and a front loading position, respectively. In this disk detection sensor, light is passed between the two elements, and when the light of the light emitting element can be detected by the light receiving element, it is detected that the optical disk Dn exists in the predetermined disk storage portion 45, and when the light cannot be detected, the optical disk Dn is detected. It is detected that there is no Dn.

Next, the case where the optical disc Dn is loaded from the rear loading position will be described.
In this case, as shown in FIGS. 7 and 16, the rear transfer mechanism 56b of the disk transfer device 56 is operated, and the front transfer mechanism 56a is held in a non-operating state. First, the cam drive motor 66 is driven, and its rotational force is output to the output gear 6.
4a to the large diameter portion of the first intermediate gear 64b of the cam gear train 64. The rotational force is applied to the first intermediate gear 64b.
Is transmitted from the small diameter portion to the large diameter portion of the second intermediate gear 64c, and the torque is transmitted from the small diameter portion to the cam drive gear 64d. Then, it is transmitted from the cam drive gear 64d to the pair of cam gears 62, 63.

As a result, the pair of cam gears 62, 63
Are driven to rotate approximately 180 ° counterclockwise in FIG. As a result, the cam pin 95e provided on the movable guide rail 94 of the rear transport mechanism 56b moves along the cam surface 62c of the first cam gear 62 and gradually moves upward. Therefore, the movable guide rail 94 is lifted upward integrally with the lift plate 90b by the spring force of the coil spring 92a that urges the lift plate 90b upward. As a result, the transport belt 95c, one end of which is hung over the disk lifting portion 94a provided at the end of the movable guide rail 94, comes into contact with the lower inner edge of the optical disk Dn from below. Then, the optical disk Dn is lifted by the lifting of the transport belt 95c, and is taken out of the disk storage section 45.

At this time, the upper portion of the disk lifting portion 94a is formed thin like a blade of a sword, and the width of the upper end portion is set to be substantially equal to the thickness of the optical disk Dn. The disc lifting portion 94a enters a portion of the three optical discs Dn facing the loading position where the outer gap is wider than the innermost peripheral portions. Therefore, while the left and right optical disks Dn are pushed and opened laterally by the disk lifting portions 94a, only the center optical disk Dn can be placed on the transport belt 95c and lifted upward.

At this time, as shown in FIG. 7, the cam groove 70 provided on the back surface of the first cam gear 62 rotates by 180 °, and the displacement cam portion 70b moves to the right.
The cam follower pin 71a is guided by the
Go to As a result, the swing lever 71 is rotated in the counterclockwise direction, so that the swing lever 71 is lowered to the right. As a result, FIG.
As shown in (2), the disk drive frame 57 moves in a direction away from the plate frame 61, and the disk table 74 moves away from the chucking plate 87.

On the other hand, the second cam gear 63 is also rotated counterclockwise by 180 ° like the first cam gear 62, but the cam pin 95e provided on the movable guide rail 94 of the front transport mechanism 56a is Cam surface 63 of portion 63b
The outermost part is moved along c. Therefore, the cam pin 9
Since the height of 5e does not change, the lift plate 90
a does not move upward, and the front movable guide rail 94 is held at the original lower end position.

As shown in FIG. 7, the disc lifting section 94
Optical disk Dn lifted to a predetermined position by a
Enters the guide groove 96a of the upper guide rail 96 disposed above. Then, it is brought into contact with the bottom surface in the guide groove 96a and the rear guide piece 96b, and is elastically supported at three points of these and the transport belt 95c.

In this state, the loading motor 6
7 is driven. When the loading motor 67 is driven, its rotational force is transmitted from the output gear 65a to the large diameter portion of the first intermediate gear 65b of the loading gear train 65. The rotational force is transmitted from the small diameter portion of the first intermediate gear 65b to the drive gear 65e via the second intermediate gear 65c and the third intermediate gear 65d. Further, the driving gear 65e
Is distributed back and forth, while the front transport mechanism 5
The transmission is transmitted to the front first movable gear 65f of the rear transport mechanism 56b, and is transmitted to the rear first movable gear 65i of the rear transport mechanism 56b.

The transmission is transmitted from the front first movable gear 65f to the front belt drive gear 65m via the front second and third movable gears 65g and 65h. Further, from the rear first movable gear 65i, the rear belt driving gear 65n is connected via the rear second and third movable gears 65j and 65k.
Is transmitted to The rotation of the belt drive gears 65m, 65n causes the front and rear transport belts 95c, 95c to travel in the same direction.

In this case, in the rear disk up state shown in FIG. 7, the rear belt drive gear 65n is rotated clockwise. Therefore, a rotational force is applied to the optical disk Dn so as to rotate in the counterclockwise direction. At this time, since the upper part of the optical disk Dn is restrained by the upper guide rail 96 and the rear guide piece 96b, there is no possibility that the optical disk Dn moves backward. On the other hand, the distance H2 between the guide groove 96a of the upper guide rail 96 and the conveyor belt 95c is smaller than the diameter S of the optical disk Dn (H2 <S), but the movable guide rail 94 is attached upward by the coil spring 92a. The distance H2 can be made larger than the diameter S because it is urged.

Accordingly, when the forward moving force due to the rotation of the optical disk Dn becomes larger than the spring force of the coil spring 92a, as shown in FIGS.
The n enters the distance H2 and pushes down the movable guide rail 94. Thus, the distance H3 becomes equal to the diameter S (H3 = S). At this time, the pair of cam gears 62 and 63 are held in a stopped state, and the cam surface 6 of the first cam gear 62 is
The cam pin 95e in contact with 2c moves radially outward while being guided by the step 62d of the cam portion 62b. Thereby, the position of the optical disk Dn changes from the position shown in FIG. 7 to the position shown in FIG. 9 via the position shown in FIG. 8, and the loading of the optical disk Dn is executed.

As a result, as shown in FIGS. 9 and 18,
The loading of the optical disk Dn is completed when the optical disk Dn is transported to the center. At this time, the rotation end 93b of the disk stopper 93 is pushed down by the stopper restricting piece 91f of the front lift plate 90a at the front end of the optical disk Dn.
The optical disc Dn is in contact with a stopper 93a protruding on the movement trajectory to prevent the optical disc Dn from moving forward. Further, the position of the optical disk Dn is slightly above the disk mounting portion used for the reproducing operation.

At this time, the front end portion of the optical disk Dn projects forward from the inner end portion of the transport belt 95c, so that the third point of the transport belt 9 which comes into contact with the optical disk Dn.
The inner end of 5c is slightly in contact with the lowermost end of the optical disc Dn. Therefore, the rear lift plate 90b is lifted by the spring force of the coil spring 92a,
The distance H4 between the guide groove 96a and the conveyor belt 95c becomes the shortest (H4 <S). At this time, the cam pin 95e in contact with the cam surface 62c of the first cam gear 62 is
It moves radially inward along the step 62d of the cam 62b.

Next, the cam drive motor 66 is driven to move the cam gears 62 and 63 clockwise in FIG.
Rotate °. Accordingly, the cam pin 95e is moved downward by the cam surface 62c of the first cam gear 62, and the rear movable guide rail 94 is pushed down. Thereby, the optical disk Dn moves downward by its own weight.

At this time, the cam groove 7 of the first cam gear 62
The cam follower pin 71a engaged with 0 moves from the inside in the radial direction to the outside. Therefore, the swing lever 7
1 is swung clockwise about the mounting screw 38e. As a result, the upper engagement pin 58a engaged with the upper engagement hole 71b of the swing lever 71 moves rightward in FIG. 9, and the lower engagement pin 58a engaged with the lower engagement hole 71c. 59a moves to the left in FIG. As a result, the upper slide plate 58 moves rightward, and the lower slide plate 59 moves leftward.

As a result, as shown in FIGS. 10 and 19, the upper guide pins 57 of the disk drive frame 57 engaged with the respective guide grooves 58c of the upper slide plate 58.
a moves to the parallel portion side of the guide groove 58c. Similarly,
Lower guide pin 57b of disk drive frame 57 engaged with each guide groove 59c of lower slide plate 59
Moves to the parallel portion side of the guide groove 59c. for that reason,
Disk drive frame 57 is plate frame 61
The disk table 74 of the drive unit 72 elastically supported by the disk drive frame 57 approaches the optical disk Dn.

Then, when the optical disk Dn is lowered to the disk mounting portion, the fitting portion 74b of the disk table 74 is fitted into the center hole Dc of the optical disk Dn. At the same time, the chucking plate 87 supported by the chucking lever 88 attached to the plate frame 61 is attracted by the magnet 74e built in the disk table 74. As a result, the disc table 74 and the chucking plate 8
7 hold the optical disk Dn, and the chucking is completed. Thereafter, the movable guide rail 94 is further pushed down, and the transport belt 95c is completely separated from the optical disk Dn.

As a result, the optical disk Dn can be reproduced by the drive unit 72. Thus, the spindle motor 78 of the drive unit 72 is driven to rotationally drive the optical disk Dn (for example, at a constant linear velocity), and the information signal is read while the optical pickup device 76 is moved in the radial direction of the optical disk Dn. Thus, the reproduction of the information signal recorded on the information recording surface of the chucked optical disc Dn is executed.

After the reproduction of one surface of the optical disk Dn is completed, when the reproduction of the remaining surface is continuously performed, the optical disk Dn is returned to the original disk storage portion 45 once. Also, when the reproducing operation is terminated by one-sided reproduction of the optical disk Dn, the optical disk Dn is returned to the original disk storage unit 45. The operation of returning the optical disk Dn is performed by an operation reverse to the above-described loading operation.

That is, in the state shown in FIGS. 10 and 19, when the cam drive motor 66 is driven to rotate in the reverse direction, the pair of cam gears 62 and 63 are moved counterclockwise through the cam gear trains 64a to 64. Rotate 180 °. Accordingly, the cam follower pin 71a engaged with the cam groove 70 of the first cam gear 62 moves from the radially outer displacement cam portion 70b to the inner circumferential cam portion 70a. Therefore, the swing lever 71 swings counterclockwise around the mounting screw 38e. Thereby, the swing lever 7
1 upper engaging pin 58a engaged with the upper engaging hole 71b.
Moves to the left, and the lower engagement pin 59a engaged with the lower engagement hole 71c moves to the right. As a result, the upper slide plate 58 moves leftward, and the lower slide plate 59 moves rightward.

Thus, the disk drive frame 5 engaged with each guide groove 58c of the upper slide plate 58
7, the upper guide pin 57a moves from the parallel portion of the guide groove 58c to the inclined portion side. Similarly, the lower guide pin 57b of the disk drive frame 57 engaged with each guide groove 59c of the lower slide plate 59 moves from the parallel portion of the guide groove 59c to the inclined portion side. Therefore, the disk drive frame 57 moves in a direction away from the plate frame 61, and the disk table 74 of the drive unit 72 is separated from the chucking plate 87. Thereby, the chucking of the optical disk Dn in the disk mounting portion is released.

At this time, the optical disk Dn separated from the disk table 74 is placed on the rear transport belt 95c and supported at three points: the front disk stopper 93 and the upper guide rail 96. At this time, since the upper end of the optical disk Dn is supported by the lower edge of the upper guide rail 96, the optical disk Dn does not fall and jump out of the disk mounting portion.

At the same time, the cam pin 95e moves upward along the cam surface 62c of the first cam gear 62, and the rear movable guide rail 94 is pulled upward. As a result, the optical disc Dn placed on the transport belt 95c of the rear movable guide rail 94 is moved by the coil spring 92a.
And is changed to the state shown in FIG. At this time, since the front transport mechanism 56a only moves the cam pin 95e of the front movable guide rail 94 on the outer peripheral portion of the cam surface 63c of the second cam gear 63, the lift plate 90a is not moved up and down. It is held at the original lower end position.

Next, in the state shown in FIG. 9, by driving the loading motor 67, the transport belt 95c runs counterclockwise. Thereby, the transport belt 95
A rotational force is applied to the optical disk Dn from c, and the optical disk Dn is rotated clockwise. Due to the rotational force of the optical disk Dn, the rear movable guide rail 94 is pressed down against the spring force of the coil spring 92a. As a result, the optical disk Dn rides on the transport belt 95c, and is transported rearward between the transport belt 95c and the guide groove 96a of the upper guide rail 96 (see FIG. 8).

Then, the optical disk Dn is
After reaching the outer end of the transport belt 95c, the rear end of the optical disk Dn jumps out of the outer end of the transport belt 95c (see FIG. 7). And guide groove 96 of upper guide rail 96
a and the rear guide piece 96b.

Next, the first cam gear 62 is rotated approximately 180 ° clockwise through the operation of the cam drive motor 66. Thereby, the cam pin 95e is formed by the cam surface 62c.
Is pushed down, and the rear movable guide rail 94 moves downward. As a result, the optical disk Dn similarly moves downward and is stored in the original disk storage section 45 (see FIG. 6). Thereby, the optical disk Dn returns to the initial position, and the disk reproducing device 31 returns to the initial state.

When the other surface of the optical disk Dn is subsequently reproduced, the turntable 32 is rotated by 180 ° through the operation of the table rotation drive mechanism 50, and the optical disk Dn is transported by the front transport mechanism 56a. Move to the position. At this time, the upper end of the optical disk Dn stored in the disk storage part 45 of the turntable 32 is located at the top of FIG.
Although the height is the same as that of the upper end of the optical disk Dn at the time of chucking shown in FIG. 0, the notch 96d is provided at the lower end edge of the upper guide rail 96 above the disk storage part 45, so that the turntable 32 There is no possibility that the optical disk Dn on the disk storage section 45 will contact the upper guide rail 96 when rotating.

When the optical disk Dn is transported to the front transport position by the rotation of the turntable 32, the optical disk Dn is transported by the front transport mechanism 56a through a transport operation similar to the transport operation by the rear transport mechanism 56b. .

Next, a case where the optical disc Dn is loaded from the front loading position will be described. In this case, as shown in FIGS. 11 and 20, of the disk transport device 56, the front transport mechanism 56a is operated, and the rear transport mechanism 56b is kept in a non-operating state. First, the cam drive motor 66 is driven, and its rotational force is transmitted from the output gear 64a of the cam gear train 64 to the first intermediate gear 64b.
And a cam drive gear 64d via a second intermediate gear 64c
Is transmitted to Then, it is transmitted from the cam drive gear 64d to the pair of cam gears 62, 63.

As a result, the pair of cam gears 62, 63
Are driven to rotate approximately 180 ° clockwise in FIG. As a result, the cam pin 95e provided on the front movable guide rail 94 of the front transport mechanism 56a moves along the cam surface 63c of the second cam gear 63, and gradually moves upward. Therefore, the spring force of the coil spring 92a that urges the front lift plate 90a upwards,
The movable guide rail 94 is lifted up integrally with the lift plate 90a. Thereby, the movable guide rail 9
A transport belt 95c, one end of which is hung over a disk lifting portion 94a provided at the outer end of the optical disk 4, comes into contact with the lower inner edge of the optical disk Dn from below. Then, the optical disc Dn is lifted by the rise of the transport belt 95c,
It is taken out of the disk storage unit 45.

At this time, since the upper portion of the disk lifting portion 94a is formed to be thin and the width of the upper end portion thereof is set to be substantially equal to the thickness of the optical disk Dn, the disk lifting portion 94a faces the loading position. The optical disk Dn enters a portion where the outer gap is wider than the innermost peripheral portion. Therefore, while the left and right optical disks Dn are pushed and opened in the horizontal direction by the disk lifting unit 94a, only the center optical disk Dn is transported by the transport belt 95c.
It can be placed on top and lifted up.

At this time, the cam groove 70 provided on the back surface of the first cam gear 62 rotates by 180 °, and the displacement cam portion 70b moves to the left. It moves to the peripheral cam part 70a. As a result, the swing lever 71 is rotated clockwise, so that the swing lever 71 is lowered to the right. As a result, as shown in FIG. 20, the disk drive frame 57 moves in a direction away from the plate frame 61, and the disk table 74 moves away from the chucking plate 87.

On the other hand, the first cam gear 62 is also rotated 180 ° clockwise similarly to the second cam gear 63, but the cam pin 95e provided on the movable guide rail 94 of the rear transport mechanism 56b is Cam surface 62c of portion 62b
Only move the outermost portion along the cam pin 9
No change occurs in the height of 5e. Therefore, the rear lift plate 90b does not move upward, and the rear movable guide rail 94 is held at the initial lower end position. Therefore,
The optical disk Dn stored in the disk storage unit 45 corresponding to the rear side is not taken out.

As shown in FIG. 11, the disk lifting section 9
Optical disk D lifted to a predetermined position by 4a
n enters the guide groove 96a of the upper guide rail 96 disposed above. A front guide piece 96c provided on the bottom surface in the guide groove 96a and the inner surface of the door 36.
, And are elastically supported at these three points, that is, the transport belt 95c.

In this state, the loading motor 6
7 is driven, the rotational force is transmitted from the output gear 65a of the loading gear train 65 to the first intermediate gear 65b.
, The second intermediate gear 65 and the third intermediate gear 65d are transmitted to the drive gear 65e. Further, the driving gear 65e
Is distributed back and forth and transmitted to the front first movable gear 65f of the front transport mechanism 56a and the rear first movable gear 65i of the rear transport mechanism 56b. And the front first
Is transmitted to the front belt drive gear 65m through the front second and third movable gears 65g and 65h, and the rear second and third gears are transmitted from the rear first movable gear 65i. The power is transmitted to the rear belt drive gear 65n via the movable gears 65j and 65k. These belt drive gears 65
m, 65n, the front and rear transport belts 95c, 9
5c is driven in the same direction.

In this case, in the disk-up state on the front side shown in FIG. 11, the front belt drive gear 65m is rotated counterclockwise. Therefore, a rotational force is applied to the optical disk Dn to rotate clockwise. At this time, since the upper part of the optical disk Dn is restrained by the upper guide rail 96 and the front guide piece 96c, there is no possibility that the optical disk Dn moves forward. On the other hand, the guide groove 96a of the upper guide rail 96 and the conveyance belt 95
The distance H2 from the movable guide rail 94 is smaller than the diameter S of the optical disk Dn (H2 <S).
Is biased upward by the coil spring 92a, so that the distance H2 can be made larger than the diameter S.

Therefore, when the forward moving force due to the rotation of the optical disc Dn becomes larger than the spring force of the coil spring 92a, the optical disc Dn enters the distance H2 and pushes down the movable guide rail 94 as shown in FIG. . Thereby, the distance H3 becomes equal to the diameter S (H3
= S). At this time, the pair of cam gears 62 and 63 are held in a stopped state, and the cam pin 95e in contact with the cam surface 63c of the second cam gear 63 is moved to the stepped portion 6 of the cam portion 63b.
It moves radially outward while being guided by 3d. As a result, the position of the optical disk Dn changes from the position shown in FIG. 11 to the position shown in FIG. 13 via the position shown in FIG. 12, and the loading of the optical disk Dn is executed.

As a result, as shown in FIG. 13, the loading of the optical disk Dn is completed by transporting the optical disk Dn to the center. At this time, the rear end portion of the optical disk Dn is projected on the movement trajectory of the optical disk Dn because the rotating operation portion 93b of the disk stopper 93 is pushed down by the stopper restricting piece 91f of the rear lift plate 90b. Stopper 93a
, So that rearward movement is prevented. Also,
The position of the optical disk Dn is slightly higher than the disk mounting portion used for the reproducing operation.

At this time, the rear end portion of the optical disk Dn projects rearward from the inner end portion of the transport belt 95c, so that the third point of the transport belt 9 which comes into contact with the optical disk Dn.
The inner end of 5c is slightly in contact with the lowermost end of the optical disc Dn. Therefore, the front lift plate 90a is lifted by the spring force of the coil spring 92a,
The distance H4 between the guide groove 96a and the conveyor belt 95c becomes the shortest (H4 <S). At this time, the cam pin 95e in contact with the cam surface 63c of the second cam gear 63 is
It moves radially inward along the step 63d of the cam 63b.

Next, the cam drive motor 66 is driven to move the cam gears 62 and 63 counterclockwise in FIG.
Rotate 80 °. Thereby, the cam pin 95e moves downward by the cam surface 63c of the second cam gear 63,
The front movable guide rail 94 is pushed down. Thereby, the optical disk Dn moves downward by its own weight.

At this time, the cam groove 7 of the first cam gear 62
Since the cam follower pin 71a engaged with 0 moves from the inside to the outside in the radial direction, the swing lever 71 swings clockwise around the mounting screw 38e. As a result, the upper engagement pin 58a engaged with the upper engagement hole 71b of the swing lever 71 moves rightward in the drawing, and the lower engagement pin 59a engaged with the lower engagement hole 71c. Moves to the left in the figure. As a result, the upper slide plate 58 moves rightward, and the lower slide plate 59 moves leftward.

Thus, as shown in FIG. 14, the upper guide pins 57a of the disk drive frame 57 engaged with the respective guide grooves 58c of the upper slide plate 58 move toward the parallel portions of the guide grooves 58c. Similarly, the lower guide pin 57b of the disk drive frame 57 engaged with each guide groove 59c of the lower slide plate 59 moves toward the parallel portion of the guide groove 59c. Therefore, the disk drive frame 57 approaches the plate frame 61 side,
The disk table 74 of the drive unit 72 elastically supported by the disk drive frame 57 approaches the optical disk Dn.

Then, when the optical disk Dn is lowered to the disk mounting portion, the fitting portion 74b of the disk table 74 is fitted into the center hole Dc of the optical disk Dn. At the same time, the chucking plate 87 supported by the chucking lever 88 attached to the plate frame 61 is attracted by the magnet 74e built in the disk table 74. As a result, the disc table 74 and the chucking plate 8
7 hold the optical disk Dn, and the chucking is completed. Thereafter, the movable guide rail 94 is slightly pushed down, and the transport belt 95c is completely separated from the optical disk Dn.

As a result, the other surface of the optical disk Dn can be reproduced by the drive unit 72.
Therefore, the spindle motor 78 of the drive unit 72
To rotate the optical disk Dn (for example,
The information signal is read while moving the optical pickup device 76 along the radial direction of the optical disk Dn together with the linear velocity. Thereby, the reproduction of the information signal recorded on the second information recording surface of the chucked optical disc Dn is executed. As a result, it is possible to continuously reproduce information signals recorded on both sides of one optical disc Dn.

The disc reproducing apparatus 31 of this embodiment
According to this, one of the transport mechanisms of the disk transport device 56 is arranged at the front of the device, that is, at the disk entrance 40, so that the optical disk Dn is mounted on the disk drive device 72 without rotating the turntable 32. be able to. In this case, the optical disk Dn is stored in the disk storage portion 45 located at the
To be stored. Thus, the reproducing operation can be performed by loading the optical disc Dn by the front transport mechanism 56a without rotating the turntable 32. Therefore, in this case, since the rotation time of the turntable 32 is not required, the reproduction operation can be performed early from the start of the operation, and the operability can be improved. Further, since the height of the disk transport device 56 is only slightly higher than the optical disk Dn, the overall height of the disk reproducing device 31 can be set as low as possible.

As described above, the present invention is not limited to the above-described embodiment. For example, in the above-described embodiment, an example in which the present invention is applied to a disk reproducing apparatus dedicated to reproducing an information signal has been described. The present invention can be applied not only to a disk recording device dedicated to recording information signals but also to a disk recording / reproducing device capable of performing both recording and reproduction. Furthermore, the number of optical discs that can be stored in the turntable is 300 in the above-described embodiment, but it is needless to say that the number of optical discs may be 300 or less, or 300 or more.

In the above embodiment, an example in which the present invention is applied to a DVD as a disk recording medium has been described. However, the present invention is not limited to this. Can be used. Further, an optical disk such as a CD or a CD-ROM in which an information signal is recorded on only one side can be used. In the case of this single side, the information signal is not reproduced on the side where the information signal is not recorded, but the information signal is reproduced at one of the left and right positions. There is an advantage that an optical disk such as a CD can be stored without considering the above. Further, in addition to the optical disk, the present invention can be applied to a disk-shaped recording medium of another recording / reproducing format such as a magnetic disk or a magneto-optical disk. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0164]

As described above, according to the first aspect of the present invention,
According to the disk recording and / or reproducing apparatus described above, the disk drive device is disposed at the center of the turntable and the disk transport means is provided at two positions on the diagonal line of the turntable. By taking out the disk recording medium from the disk storage section and transporting it, the disk-shaped recording medium can be mounted on the disk table with one surface (for example, the A surface) of the disk-shaped recording medium facing the pickup device. Further, after the turntable is rotated about 1/2 turn in a state where the disk-shaped recording medium is returned to the original disk storage portion, the disk-shaped recording medium is transported by the other disk transport means. Can be mounted on the disc table with the other side (for example, side B) facing the pickup device. As a result, it is possible to automatically reproduce or record the both sides of the disc-shaped recording medium continuously.

In addition, it is possible to reproduce and / or record data on both sides or one side of an optical disk by using a single disk drive device, and to provide an inexpensive disk recording and / or reproducing apparatus without increasing the cost. it can. Furthermore, even when the disk-shaped recording medium is stored in the disk storage portion of the turntable without considering the orientation of the information recording surface, the reproduction or recording of the information signal can be executed without replacing the disk. Profit is also gained.

According to the disk recording and / or reproducing apparatus according to the second aspect of the present invention, since the disk transport means is provided with the disk guide and the transport belt, it can be placed vertically on the turntable and in the circumferential direction. An arbitrary one of a number of disk-shaped recording media arranged in a row is selected and taken out and transported to a disk mounting portion, or a disk-shaped recording medium after recording or reproducing operation is stored from a disk mounting portion into an original disk. The effect of being able to return to the part can be obtained.

According to the disk recording and / or reproducing apparatus of the third aspect of the present invention, since the disk guide has the elevating member and the restraining member, and the transport belt is attached to the elevating member so as to be able to run, An arbitrary one of a large number of disk-shaped recording media vertically arranged on a turntable and arranged in a circumferential direction is selected and taken out and transported to a disk mounting portion, or a disk-shaped disk after recording or reproducing operation. The effect that the operation of returning the recording medium from the disk mounting portion to the original disk storage portion can be reliably performed can be obtained.

According to the disk recording and / or reproducing apparatus of the fourth aspect of the present invention, since the operation of the pair of disk transport means is controlled by the cam drive mechanism, one disk transport means transports the disk-shaped recording medium. Sometimes, the other disk transport means is kept in a non-transport state, and the disk-shaped recording medium can always be transported by only one disk transport means, and a pair of disk transport means can be driven by one power source. Can be obtained.

According to the disk recording and / or reproducing apparatus according to the fifth aspect of the present invention, the first and second support frames are opposed to each other with the disk carrying means interposed therebetween, and the first support frame has a disk table. And a pickup device, and a chucking plate is provided on the second support frame, so that the disk-shaped recording medium transported by the disk transport means can be securely mounted on the disk table at the disk mounting section. The effect described above can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a basic configuration of a disc reproducing apparatus according to a disc recording and / or reproducing apparatus of the present invention.

FIG. 2 is a cross-sectional front view showing an embodiment of a basic configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention.

FIG. 3 is a plan view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention.

FIG. 4 is a perspective view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, with an opening / closing door being opened.

FIG. 5 is a side view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, with an opening / closing door being opened.

FIG. 6 is an explanatory view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a sectional view showing an initial position of disc loading.

FIG. 7 is an explanatory view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, in which a state in which a rear disc is lifted up in disc loading is shown in cross section. It is.

FIG. 8 is an explanatory view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a sectional view showing a loading state of a rear disc.

FIG. 9 is an explanatory view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a cross-sectional view showing a completed loading state of a rear disc.

FIG. 10 is an explanatory view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a cross-sectional view showing a completed state of chucking of a rear disc.

FIG. 11 is a cross-sectional view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, showing a state where a front-side disc is lifted up in disc loading. It is.

FIG. 12 shows an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is an explanatory view showing a cross section of a loading state of a front disc.

FIG. 13 is an explanatory diagram showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a cross-sectional view showing a completed loading state of a front-side disc.

FIG. 14 is an explanatory diagram showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and is a cross-sectional view showing a completed state of chucking of a front disc.

FIG. 15 is a plan view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, and showing a main part at an initial position of disc loading.

FIG. 16 is a plan view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, showing a main part of a state where the rear disc is lifted up during disc loading. It is.

FIG. 17 is a plan view showing one embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, showing a main part of a rear side disc in a loaded state.

FIG. 18 is a plan view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, showing a main part of a rear-side disc in a completed loading state.

FIG. 19 is a plan view showing an embodiment of a specific configuration of a disc reproducing apparatus according to the disc recording and / or reproducing apparatus of the present invention, showing a main portion of the rear disc in a chucking completed state.

FIG. 20 is a plan view showing an embodiment of a specific structure of a disk reproducing apparatus according to the disk recording and / or reproducing apparatus of the present invention, showing a main part of the state in which the front disk is lifted up during disk loading. It is.

21 is an explanatory view showing a cross section of a main part of a turntable according to one embodiment of a specific configuration of the disc reproducing apparatus shown in FIG. 3;

FIG. 22 is a cross-sectional view showing a table rotation drive mechanism according to one embodiment of a specific configuration of the disc reproducing apparatus shown in FIG. 3;

FIG. 23 is a plan view showing a table rotation drive mechanism according to one embodiment of a specific configuration of the disk reproducing apparatus shown in FIG. 3;

24 is a perspective view showing a cam drive mechanism according to one embodiment of a specific configuration of the disc reproducing apparatus shown in FIG. 3;

FIG. 25 is a front view showing a main part of a cam drive mechanism according to an embodiment of a specific configuration of the disc reproducing apparatus shown in FIG. 24;

26 is a front view showing a power transmission system of a disk transport mechanism according to one embodiment of the specific configuration of the disk reproducing device shown in FIG. 6;

FIG. 27 is a perspective view showing a frame of the disk drive device according to one embodiment of the specific configuration of the disk reproduction device shown in FIG. 6;

28 is a perspective view showing a disk drive device according to an embodiment of a specific configuration of the disk reproducing device shown in FIG.

29 is an exploded perspective view showing a disk drive device according to an embodiment of a specific configuration of the disk reproduction device shown in FIG. 6;

30 is a side view showing a disk drive device according to an embodiment of the specific configuration of the disk reproduction device shown in FIG. 6;

FIG. 31 is an exploded perspective view showing a disc transport mechanism and others according to an embodiment of the specific configuration of the disc reproducing apparatus shown in FIG. 6;

FIG. 32 is a plan view showing a schematic configuration of an example of a conventional disk reproducing apparatus.

FIG. 33 is a plan view showing a schematic configuration of another example of the conventional disk reproducing apparatus.

[Explanation of symbols]

11, 31 disc playback device (disc recording and / or playback device), 12, 32 turntable, 1
3, 33 main chassis, 14 disk drive unit, 15, 74 disk table, 16, 76
Optical pickup device (pickup device), 1
7,56 disk transport device (disk transport means),
18 support frame, 22 transfer rail, 23a,
23b disk ejection lever, 24 disk return lever, 34 exterior cover, 35 front panel,
36 opening / closing door, 37 table support, 40 disk entrance / exit, 46 table gear, 50 table rotation drive mechanism, 56a, 56b transport mechanism, 57
Disk drive frame, 57a, 57b Guide pin, 57, 59 Slide plate, 58c, 59c
Guide groove, 60 base frame (first support frame), 61 plate frame (second support frame), 62, 63 cam gear, 64 cam gear train,
65 loading gear train, 66 cam drive motor, 67 loading motor, 70 cam groove, 7
Reference Signs List 1 swing lever, 71a cam copying pin, 72 drive unit (disk drive device), 78 spindle motor, 87 chucking plate, 9
0a, 90b lift plate, 92a, 92b coil spring, 93 disk stopper, 94 movable guide rail (elevating member), 94a disk lifting section,
95c conveyor belt, 95e cam pin, 96
Upper guide rail (restraint member), 96a guide groove,
96b, 96c guide pieces (restraining members), Dn optical discs (disk-shaped recording media)

Claims (5)

[Claims] 1. A turntable capable of storing a disk-shaped recording medium vertically and arranged in a circumferential direction, a disk drive device mounted with the disk-shaped recording medium and recording and / or reproducing information signals, and A disk transport device for transporting the disk-shaped recording medium between the disk drive device and the turntable, wherein the disk recording and / or reproducing device comprises: A disk recording and / or reproducing apparatus, wherein the disk drive device is arranged and the disk transport means is provided at two positions on a diagonal line of the turntable. 2. The disk transport means includes: a disk guide for lifting the disk-shaped recording medium from a disk storage portion of the turntable to limit movement; and applying a rotational force to the disk-shaped recording medium to the disk guide. The disk recording and / or reproducing apparatus according to claim 1, further comprising: a transport belt that rolls along the transport path and transports the disk to a disk mounting portion of the disk drive device. 3. The disk guide has an elevating member provided so as to be able to move up and down in a center hole of the turntable, and a restraining member for restraining the disk-shaped recording medium between the elevating member. 3. The disk recording and / or reproducing apparatus according to claim 2, wherein the transport belt is attached to a lifting member so as to be able to run. 4. A cam drive mechanism for rotating a pair of said disk transport means provided at said two locations in conjunction with each other, wherein one of said disk transport means transports said disk-shaped recording medium. 2. The disk recording and / or reproducing apparatus according to claim 1, wherein the other disk transport means is kept in a non-transport state when performing. 5. The disk drive device has a first support frame and a second support frame which are opposed to each other with the disk transfer means interposed therebetween, and the first support frame has the disk-shaped recording medium. A disk table on which a medium is mounted and a pickup device are provided, and a chucking plate for holding the disk-shaped recording medium between the second support frame and the disk table is provided. 2. The disc recording and / or reproducing apparatus according to claim 1.