JP2982940B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus suitable for optical disks and magneto-optical disks.

[0002]

2. Description of the Related Art With the rapid spread of an optical disk represented by a compact disk and a magneto-optical disk which is one of computer peripheral devices, there is a need for a disk reproducing device capable of charging a plurality of (three or more) disks. Is increasing. Japanese Patent Laid-Open Publication No.
No. 189860 “Compact disc playback device”
Japanese Patent Application Laid-Open No. 3-83262 discloses a "disk reproducing apparatus".

The above is a technique proposed by the applicant of the present invention, in which three magazine cases 3, 3, 3 are mounted on a reproducing apparatus main body 2 as shown in FIG. Six disk trays DT are slidably housed in the magazine case 3, and disks are placed on each of the disk trays DT. Therefore, 18 sheets (3
X6) Discs can be preset.

Further, as shown in FIG. 2 of the above, a stocker 20 is provided at the back of the apparatus.
0 has six sub-tray 23 _{1-23 6} stores the six discs on these sub-tray 23 _{1-23 6} optionally transferred disk to the main tray 30, to play, the disc Six discs can be played back as appropriate, just like replacing and playing back another disc.

[0005]

However, the above method requires a magazine case, and requires an operation of inserting a disk into the magazine case and an operation of mounting the magazine case on a playback device, which is troublesome. In addition, since the magazine case can be completely removed from the playback device, there is a new inconvenience that if the magazine case is lost, playback cannot be performed.

Since the above-mentioned case does not require a magazine case, there is no risk of the case being lost, and the operation is relatively simple. However, since the mechanism for inserting the external disk into the back stocker 20 and the mechanism for moving the disk from the back stocker 20 to the playback position are the same, it is not possible to remove or insert the external disk during the playback operation. Can not. That is,
It is characterized in that the preset of the disc and the reproduction of the disc are not performed simultaneously. However, there is a demand to exchange other discs during playback.

An object of the present invention is to provide a disk reproducing apparatus which does not require a magazine case and can exchange other disks during reproduction.

[0008]

In order to achieve the above object, the present invention provides a sub-tray for mounting a disc,
A main tray for holding the sub-tray so as to be movable by a certain distance; a reproducing apparatus housing for holding at least three main trays arranged in a stack so as to be movable for a certain distance; and a tray moving mechanism for selectively moving the sub-tray and the main tray. And a reproducing mechanism for reproducing the disk placed at the reproducing position, constitutes a disk reproducing apparatus.

The tray moving mechanism includes a pinion that meshes with one of a rack attached to the sub-tray and a rack attached to the main tray, a pinion rotating motor that rotates the pinion, and a pinion And pinion moving means for moving along the rotation axis.

The pinion moving means includes a pinion elevating cam for moving the pinion along the rotation axis, and the reproducing mechanism is moved to a predetermined position by a reproducing unit elevating cam, and one of the pinion elevating cam and the reproducing unit elevating cam is provided. Is selectively rotated by the cam rotation motor.

[0011]

By moving three or more main trays, the sub-tray is positioned “inside” or “outside” of the playback device housing, and a disk is placed on the sub-tray or replaced at the “outside” position. At the "in" position, the sub-tray is moved to the standby position or the reproduction position, and the recording is reproduced at the reproduction position. The movement of the main tray and the sub-tray is all performed by the tray moving mechanism. Other main trays other than the main tray related to the reproduction can be moved at any time, and the disc can be replaced even during the reproduction.

For example, tray movement is performed by engaging a pinion with a rack attached to a main tray or a rack attached to a sub-tray. Since only one pinion moves across a plurality of racks, only one pinion is required.

The pinion is moved in the axial direction by the pinion elevating cam. Further, the reproducing mechanism is appropriately moved by the reproducing unit elevating cam. By selectively driving the pinion elevating cam and the reproducing unit elevating cam by a cam rotation motor, only one motor can be used.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a perspective view of a disk reproducing apparatus according to the present invention. The disk reproducing apparatus 1 has three slits 4, 4, 4 on the front surface 3 of a reproducing apparatus housing 2 (hereinafter abbreviated as "housing 2").
Are opened, and the main trays 15 can be pulled out of each of the slits 4. This is a reproducing apparatus capable of taking in and out a total of three discs D (recording media). It should be noted that the present invention is not limited to a reproduction-only device, but also includes a recording / reproduction device. In short, the invention is widely applied to a device having a reproduction function.

FIG. 2 is a plan view of the sub-tray and the main tray according to the present invention. The sub-tray 10 has a concave portion 10a for accommodating a disk D or a concave portion 10b for accommodating a disk d having a smaller diameter, and has an optical pickup unit (or U-shaped notch 10 for introducing magneto-optical unit)
c, a rack 11 is integrally provided on the lower surface, and a pinion through hole 12 is formed at a position facing the rear end of the rack 11.
It is provided with.

The main tray 15 is provided with guide grooves 15a, 15a having a U-shape in section, for example, on both sides of a flat plate, a large square notch 15b at the rear, and a rack 16 integrally on the lower surface. It is provided with a pinion through hole 17 opened at a position facing the front end. By fitting the sub-tray 10 into the guide grooves 15a, 15a of the main tray 15, the sub-tray 10 can move lightly between the A position and the B position. Although the rack 11 of the sub-tray 10 and the rack 16 of the main tray 15 are located in an overlapping position in plan view, the racks 11 and 16 are shifted from each other in a direction perpendicular to the plane. The sub-tray 10 and the main tray 15 are selectively driven by one pinion, and the relationship and operation with the pinion will be described in the section of operation.

FIG. 3 is a side perspective view of the casing of the reproducing apparatus according to the present invention, showing that the main trays 15 are held in the upper and lower three stages in the casing 2, and the tray is moved to the front inside the casing 2. It shows that the mechanism 20, the pinion elevating cam 30, the reproducing unit elevating cam 40, and the reproducing mechanism 50 are provided in the inner part of the housing. Hereinafter, these mechanisms and cams will be described in detail.

FIG. 4 is a view taken in the direction of arrow 4-4 in FIG.
Is front, and “R” is back. As described above, the tray moving mechanism 20, the pinion elevating cam 30 as a pinion moving means, the reproducing unit elevating cam 40, the pinion rotating motor 21, the cam rotating motor 41 Indicates that is arranged. Gears will be described later.
The playback mechanism 50 disposed at the back of the housing 2 includes a platform 52 supported by the pantograph links 51 and 51 so as to be able to move up and down, a turntable 53 attached to the platform 52, and the optical pickup unit 5.
4. Consists of a guide rail 55 and the like, and a disc clamper (not shown). As is well known, the turntable 53 is accurately rotated by a turntable motor (not shown), and the optical pickup unit 54 is reciprocated along a guide rail 55 by a traverse motor 56 and a gear set 57. In the figure, reference numeral 59 denotes a lever protruding from the platform 52, which is a member that engages with the reproducing unit elevating cam 40.

The base gear 42 of the reproducing section elevating cam 40
Is a swing gear 43, which is connected to a gear 45a by a tie plate 44, and swings right or left in accordance with the rotation direction of the gear 45a. This gear 45
a is the gear 45b, gear 45c, gear 45d and gear 45
The cam rotation motor 41 is connected to the cam rotation motor 41 to rotate one of the pinion elevating cam 30 and the reproducing unit elevating cam 40.

FIG. 5 is a view taken in the direction of the arrow 5 in FIG. The output of the pinion rotation motor 21 is the gear 22a, the gear 22b, the gear 22c (the gear 22b
And 22c are integral. Others are the same. ), The gear 22 d, the long gear 23, the gear 24 and the neck 25 are transmitted to the pinion 26. And pinion 26 is neck 2
5 and the gear 24 can be moved up and down by a stroke L. This elevating and lowering is performed via the elevating claw 32, and that point will be described below.

FIG. 6 is a perspective view of the pinion elevating cam and the reproducing unit elevating cam according to the present invention.
Is a cylindrical cam formed by connecting a required number of horizontal planes with inclined surfaces to hold the lifting claw 32 at any of six different levels. The lifting claw 32 moves up and down while maintaining a correct posture without being inclined by the T groove 2a of the housing 2. In addition, the reproducing section elevating cam 40 is a cylindrical cam formed by connecting a required number of horizontal planes with slopes in order to hold the lever 59 at any of six different levels. Note that the shapes and relative positional relationships of the cams 30, 40 are not accurate.

The operation of the above-described disk reproducing apparatus will now be described. FIG. 7 is an explanatory view of the first operation of the present invention. The front part of the main tray 15 at a certain stage is “outside” the housing 2 and the disk D can be placed on the sub-tray 10 or a new disk can be used. Indicates that the disk can be replaced. This position is referred to as a “disk replacement position”. Immediately below the pinion holes 12 of the sub-tray 10, there is a pinion holes 17 of the main tray 15. However, at this time, the pinion 26 is engaged with the rack 16 of the main tray 15. Next, when the pinion 26 is rotated counterclockwise in the figure, the main tray 15 moves into the housing 2.

FIG. 8 is a view for explaining the second operation of the present invention, and shows that the main tray 15 has been sufficiently inserted “inside” the housing 2 in the above procedure. At this time, the sub tray 10 is at the “standby position”. 7 and 8 are repeated, the other two main trays 15 are also inserted into the housing 2, and all the disks are made to wait at the "standby position".

FIG. 9 is a view for explaining a third operation of the present invention, in which the pinion 26 is raised or lowered (moves in the front and rear directions in the figure) until it engages with the rack 11 of the sub-tray 10 to be reproduced. At this time, in this embodiment, the pinion 26 is finely rotated in a very short cycle. Then, the pinion 26 can smoothly mesh with the rack 11 of the sub-tray 10 or the rack 16 of the main tray 15, or the pinion 26 can smoothly pass through the racks 11, 16.

As another structure, the teeth of the racks 11, 16 or the pinion 26 are tapered. When the taper processing is performed, the strength of the teeth is reduced, and the life of the racks 11, 16 or the pinion 26 is shortened. In this regard, fine rotation of the pinion 26 is preferable because it is not necessary to weaken the teeth, so that the strength of the teeth can be maintained at a high level.

In FIG. 8, the rack 11 of the sub-tray 10
By rotating the pinion 26 meshing with the counterclockwise direction, the sub-tray 10 can be moved to the "reproduction position" as shown in FIG. In this process, the main tray 15 is stationary because it is not related to the pinion 26. As described above, the pinion 26 is moved across the bottom main tray 15, the bottom sub-tray 10, the middle main tray 15, the middle sub-tray 10, the top main tray 15, or the top sub-tray 10. 6 and the operation of meshing with either of the racks 11 or 16 is performed by the action of the pinion lifting cam 30 and the lifting claw 32 shown in FIG.

FIGS. 10 (a) and 10 (b) are diagrams for explaining the fourth operation of the present invention (operational diagram of the reproducing mechanism). Although not described in FIG. 9, the sub-tray 10 is moved from the standby position to the reproducing position. To do so, the turntable 53 and the clamper 61 are kept on standby as shown in FIG. This is to avoid interference. When the disk D reaches the reproduction position, the turntable 53 is raised to scoop up the disk D as shown in FIG. Next, the disc D is reproduced by the optical pickup unit 54 of FIG.

FIG. 11 is an explanatory view of the fifth operation (an explanatory view of the height position of the turntable) of the present invention.
Reference numeral 3 denotes a # 1 position (lowest standby position), a # 2 position (lowest reproduction position), a # 3 position (intermediate standby position), # 4
The position (reproduction position at the middle), the # 5 position (top standby position), and the # 6 position (top reproduction position) are held. This movement is performed by the reproducing unit elevating cam 40 in FIG.

FIG. 12 is an explanatory view of the sixth operation of the present invention (explanatory drawing when a disc is replaced during reproduction), and the pinion 26 (not shown) is empty during reproduction. Therefore, for example, the uppermost main tray 15 is pulled out of the housing 2 by this pinion, and the disk D related thereto is replaced. Similarly, the middle main tray 15 can be pulled out. For example, if the number of stages of the main tray 15 is set to ten, nine main trays 15 except for the main tray 15 being reproduced are pulled out to the “disk exchange position” as needed.
The feature is that the disk can be exchanged.

The sub-tray 10 and the main tray 15
The pinion through holes 12 and 17 may be U-shaped notches. If a U-shaped notch is formed, the pinion 26
It can also move in the plane direction of 0,15. That is, the pinion 26
The rack 1 is moved in the direction of the pinion axis while being separated from the racks 11 and 16, and the pinion 26 is moved at a predetermined position in the direction perpendicular to the pinion axis (the surface direction of the trays 10 and 15), and
1 or the rack 16. According to this configuration,
Since there is no need to finely rotate the pinion 26, the load on the motor and the control mechanism can be reduced. There is no need to taper the racks 11, 16 or the pinion 26.

In this embodiment, the sub-tray 10 and the main tray 15 are placed horizontally. However, the present invention is not limited to this, and the trays 10 and 15 may be placed vertically or obliquely. In this case, “elevating” the pinion elevating cam 30 or the reproducing unit elevating cam 40 means moving along the rotation axes of the cams 30 and 40.

[0032]

According to the present invention, the following effects are exhibited by the above configuration. A first aspect of the present invention provides a sub-tray for mounting a disk, a main tray for holding the sub-tray so as to be movable by a certain distance, a reproducing apparatus housing for holding at least three main trays for a certain distance, a sub-tray and a main tray. Since the disc reproducing apparatus is constituted by a tray moving mechanism for selectively moving the tray and a reproducing mechanism for reproducing the disc placed at the reproducing position, the reproducing apparatus can always reproduce the main trays other than the main tray related to the reproducing. It can be pulled out of the housing, and the disk can be replaced even during playback.

A second aspect of the present invention provides a tray moving mechanism comprising: a pinion that meshes with one of a rack attached to a sub-tray and a rack attached to a main tray; and a pinion rotation motor that rotates the pinion. And pinion moving means for moving the pinion along the rotation axis of the pinion, so that the pinion is moved across a plurality of racks, so that one pinion can be provided regardless of the number of main trays and sub-tray. And the number of parts can be reduced.

According to a third aspect of the present invention, the pinion is moved in the axial direction by a pinion elevating cam, and the reproducing mechanism is appropriately moved by a reproducing unit elevating cam. By selectively driving with a cam rotation motor, only one motor can be used, and the number of motors can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk reproducing apparatus according to the present invention.

FIG. 2 is a plan view of a sub tray and a main tray according to the present invention.

FIG. 3 is a side perspective view of a playback apparatus housing according to the present invention.

FIG. 4 is a view taken in the direction of arrows 4-4 in FIG. 3;

FIG. 5 is a view taken in the direction of arrow 5 in FIG. 4;

FIG. 6 is a perspective view of a pinion elevating cam and a reproducing unit elevating cam according to the present invention.

FIG. 7 is a diagram illustrating a first operation of the present invention.

FIG. 8 is a diagram illustrating a second operation of the present invention.

FIG. 9 is a diagram illustrating a third operation of the present invention.

FIG. 10 is an explanatory view of a fourth operation of the present invention (operational diagram of the regeneration mechanism).

FIG. 11 is an explanatory view of a fifth operation of the present invention (an explanatory view of the height position of the turntable).

FIG. 12 is an explanatory view of a sixth operation of the present invention (an explanatory view when a disc is replaced during reproduction).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc reproduction apparatus, 2 ... reproduction apparatus housing, 10 ... Subtray, 11 ... Subtray rack, 12 ... Subtray pinion hole, 15 ... Main tray, 16 ... Main tray rack, 17 ... Main tray pinion hole , 2
0: tray moving mechanism, 21: pinion rotation motor, 23
... Long gear, 26 ... Pinion, 30 ... Pinion elevating cam (pinion moving means), 32 ... Elevating claw, 40 ... Reproducing part elevating cam, 41 ... Cam rotating motor, 43 ... Swing gear, 5
0: playback mechanism, 51: pantograph link, 52: platform, 53: turntable, 54: optical pickup unit, 59: lever, D, d: disk.

Claims (3)

(57) [Claims] 1. A sub-tray for mounting a disk as a recording medium, a main tray holding the sub-tray so as to be movable by a certain distance, and a main tray being capable of moving at least three main trays arranged in a stack by a certain distance. A disc reproducing device comprising: a reproducing device housing for holding; a tray moving mechanism for selectively moving the sub-tray and the main tray; and a reproducing mechanism for reproducing a disc placed at a reproducing position. 2. The apparatus according to claim 1, wherein the tray moving mechanism includes a pinion that meshes with one of a rack attached to the sub-tray and a rack attached to the main tray, a pinion rotation motor that rotates the pinion, 2. The disk reproducing apparatus according to claim 1, further comprising pinion moving means for moving the pinion along a rotation axis of the pinion. 3. The pinion moving means includes a pinion elevating cam for moving the pinion along a rotation axis,
3. The reproducing mechanism according to claim 2, wherein the reproducing mechanism is moved to a predetermined position by a reproducing unit elevating cam, and the pinion elevating cam and the reproducing unit elevating cam are selectively rotated by a single cam rotation motor. Disc playback device.