JPH02287965A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To promote the reliability by interlocking individual operations of taking out, clamping and retreating a disk with their individual cams provided on a driving gear. CONSTITUTION:When the driving gear 11 under a searching state is rotated by driving force of a motor in the direction of (a), a transfer lever pin 12a to be engaged with a cam groove 11a is moved along the groove 11a, and a lever 12 is turned in the direction of (g). An engaging groove 5a for a lift lever 5 is pushed up by a lever shaft 12b, and the lever 5 is turned in the direction of (b), and then a circumferential edge of an optical disk 2 is pushed up by a roller 6a. When the gear 11 is further rotated in the direction of (a), the disk 2 is pushed up to a play starting position by the lever 5. When the gear 11 is furthermore rotated in the direction of (a), the lever 12 is turned in the direction of (h), and the lever 5 is brought back to a reteating position, and then the roller 6a is separated from the circumferential edge of the disk 2, while a guide lever 15 is brought back to a retreating position in the direction of (c) to be under its standby state. Thus, by interlocking individual operations of taking out, clamping and reteating the disk 2 with their individual cams of the gear 11 and then performing their changes in good timing, the reliability can be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a disc playback device that plays back data from a double-sided playback type optical disc.

(Prior Art) Conventionally, there has been a disc playback device that plays back both sides of an optical disc with data recorded on both sides without reversing the optical disc.

In such a double-sided disc playback type disc playback device, double-sided playback is normally performed by moving the pickup head from one side of the optical disc to the other side.

On the other hand, a disk drive mechanism such as a disk motor and a disk table for centering and holding an optical disk while engaging with its center hole at a predetermined data playback position and rotationally driving the optical disk is a pickup. It was mounted on a fixed chassis separate from the head, and always operated on one side of the disk.

However, with this configuration, the following errors occurred.

That is, the operation of the transport mechanism that takes out the optical disc to be played from the retracted position and transports it to the play start position, the operation of the clamp mechanism that clamps the optical disc at the play start position, and the operation that retracts the transport mechanism when the optical disc is crushed. Each operation is performed by a dedicated motor, and each operation is switched by each detection switch, which not only complicates the configuration but also impedes improvement in the reliability of the mechanism.

(Problems to be Solved by the Invention) As described above, in the conventional double-sided disc playback device, not only the configuration is complicated, but also the reliability of the mechanism is not improved.

The present invention has been made to solve these problems, and aims to provide a disc playback device that has a simple configuration and can improve the reliability of its mechanism.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the disc playback device of the present invention is a disc playback device that plays back data on a double-sided playback type optical disc. a disc transport means for transporting the optical disc to a predetermined data playback position; a disc holding means for holding the optical disc at the data playback position in conjunction with the transport operation of the disc transport means; A driving gear having a cam having a predetermined shape corresponding to each switching operation for switching to a holding operation and switching to an evacuation operation for retracting the disk transport means when the optical disk is held by the disk holding means. It is.

(Function) In the disc playback device of the present invention, as the drive gear rotates, the disc transport means transports the optical disc to a predetermined data playback position, the disc holding means holds the optical disc at the data playback position, and the disc Since the holding means performs a series of operations such as retracting the disk transport means when the optical disk is held, the switching timing for each operation amount can be accurately and reliably performed.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an overall perspective view showing a disc playback device according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a disk storage device that stores a plurality of double-sided playback type optical disks (hereinafter simply referred to as optical disks) 2, each of which has data recorded on both sides, vertically at predetermined intervals. .

This disc storage container 1 is provided with an arcuate groove 2a along the outer shape of the optical disc 2 at its bottom so that each optical disc 2 can be supported in a vertically removable manner.

A disk playback unit 3 for taking out a desired optical disk 2 from the disk storage 1 and reproducing data from the optical disk 2 is arranged above the disk storage 1 in which a plurality of optical disks 2 are stored. .

This disc reproducing unit 3 is formed by integrating the various constituent parts described below so that the entire unit can be moved in the direction in which the optical discs are arranged along a guide shaft 4 fixed at both ends in a casing (not shown).

That is, this disc reproducing unit 3 is equipped with a lift lever 5 for lifting a desired optical disc 2 from the disc storage 1 to a predetermined height (data reproducing position).

The lift lever 5 is rotatably attached to the above-mentioned guide shaft 4, and has a roller 6a at its tip that rolls into contact with the peripheral edge of the optical disc 2.

6b is attached.

In this embodiment, the lift lever 5 has a substantially "<" shape, and rollers 6 are attached to both ends of the lift lever 5, so that it can be used not only to push up the optical disc 2 but also to return the optical disc 2 to its original position in the disc storage container 1. It is configured to be reliably swallowed into the groove when stored.

The optical disc 2 lifted from the disc storage device 1 along the groove by the lift lever 5 is further carried to the data reproduction position along the groove provided in the guide lever of the disc reproduction unit 3, which will be described later. ing.

In addition, in this disc playback unit 3, the optical disc 2
A pickup head (not shown) for reading out data recorded on the optical disc using a laser beam, and a pickup head (not shown) that engages with the center hole of the optical disc 2 and cooperates with a clamper to be described later to provide rotational drive to the optical disc 2. a disk table 7,
A disk drive motor 8 serving as a drive source, etc., and a tilt mechanism (not shown) that detects the warpage of the optical disk 2 and makes the head surface of the pickup head face the surface of the optical disk 2 are integrated into one mechanical chassis 9. I am on board.

However, this mechanical chassis 9 is tilted at a predetermined angle with respect to the optical disk surface so that the disk table 7 is in a position deviated from its normal position until the optical disk 2 is finally brought to the data reproduction position. When the optical disc 2 is carried to the above-mentioned data reproduction position,
In order for the disk table 7 to reach the correct position, it is controlled by a chassis movement control system that makes full use of a cam mechanism.

Further, this mechanical chassis 9 has a pair of U-shaped discs arranged so as to straddle the optical disc 2 set at the data reproduction position.
It is supported at two points by U-shaped guide rails 10a and 10b, and the mechanical chassis 9 is supported by U-shaped guide rails 10a and 10b.
By moving along lines 0g and 10b, reproduction is switched from one side of the optical disc 2 to the other side.

Note that 13 in the figure indicates a sub-guide lever, which will be described later.

2 to 5 show the cam mechanism of the disc reproducing unit 3. FIG. In the figures described below, FIG. 2 shows a search state, and FIG. 3 shows a push-up state.

In the figure, reference numeral 11 indicates a drive gear that receives the driving force of a drive motor (not shown) and rotates in the direction of arrow a or b.

A cam groove 11a is provided near the center of the surface of the drive gear 11, and a cam Ilb is provided protruding from the outer periphery of the cam groove 11a.

A cam groove 11c is provided near the center of the back surface of the drive gear 11, and a cam groove 11d is provided on the outer periphery thereof.

Near the drive gear 11, there is a relay lever pin 12 at the peripheral end.
A relay lever 12 is provided, which has a relay lever 12b and a relay lever 12b, and rotates in the directions of arrows a and b via a shaft 12c. A lift lever 5 having an engagement groove 5a is disposed near the relay lever 12 so as to be rotatable in the directions of arrows a and b via the guide shaft 4.
The relay lever pin 12b of the relay lever 12 is engaged with the relay lever pin 12b.

Near the lift lever 5, there is a guide lever bin 1 at one end.
3a and a guide lever shaft 13b at the other end, and a sub-guide lever 13 that rotates in the directions of arrows a and b via the shaft 13c is disposed. Further, a sub-guide 14 having a guide groove 14a is arranged near the lift lever 5.

Above the disc storage 1, there is an arcuate groove 15a along the outer shape of the optical disc 2, and a guide lever bin 1 at one end.
The guide lever 15 having the arrow 5b is moved by the arrow c
, and are arranged so as to be freely rotatable in the d direction.

6 and 9 show a clamping mechanism of the disc reproducing unit 3 disposed near the drive gear 11. As shown in FIG. In the figures described below, FIG. 6 shows the clamped state, and FIG. 9 shows the state during performance.

As shown in the figure, the clamp lever 16 of the clamp mechanism
A clamp pin 16a is attached to one end, and a clamper 17 is attached to the other end, and the clamp lever 16 is arranged so as to be rotatable in the directions of arrows e and f via a shaft 16b. . In addition, the clamper 17 is
Although the clamper 17 is generally made of an opaque material, it may also be made of a transparent material. You can also see it instantly.

Then, the clamp lever 16 rotates in the direction of arrow f and is fitted into the disc table 7 attached to the rotating shaft 8a of the disc drive motor 8, thereby clamping the optical disc 2.

Next, the engagement relationship between the cam groove of the drive gear 11 and each of the pins will be described.

A relay lever pin 12a of the relay lever 12 is engaged with a cam groove 11a provided on the surface of the drive gear 11. Cam groove 1 provided on the back surface of drive gear 11
A guide lever pin 15b of the guide lever 15 and a sub-guide lever pin 13a of the sub-guide lever 13 are engaged with 1c and lld, respectively.

Next, a series of operations of the disc reproducing unit 3 as the drive gear 11 rotates will be explained using FIG. 9.

First, the drive gear 11 in the search state of FIG. 2 is in the state shown in FIG.
The relay lever pin 12a engaged with the cam groove 11a
, thereby rotating the relay lever 12 in the direction of arrow g.

When the relay lever 12 rotates in the direction of arrow g, the relay lever shaft 12b pushes up the engagement groove 5a of the lift lever 5, thereby causing the lift lever 5 to rotate in the direction of the arrow.

When the lift lever 5 rotates in the direction indicated by the arrow, the roller 6a first pushes up the peripheral edge of the optical disc 2 in the disc storage 1. (See Figure 3). When the drive gear 11 further rotates in the direction of arrow a, this series of operations causes the lift lever 5' to push up the optical disc 2 to the playing start position (see Figure 6). At this time, the optical disc 2 moves to the position shown in Figure 5. It is guided along the arc-shaped groove 2 of the disc storage 1, the arc-shaped groove 15a of the guide lever 15, and the guide groove 14a of the sub-guide 14.

However, from just before the performance start position, the cam groove 1 of the drive gear 11
Since the sub-guide lever pin 13a engaged with the optical disc 1d moves, the sub-guide lever 13 rotates in the direction indicated by the arrow, and its engagement pin 13b assists in pushing up the peripheral edge of the optical disc 2.

When the drive gear 11 continues to rotate further in the direction of the arrow a, the tapered portion 11bb of the cam llb engages the clamp pin 16a.
In order to push up the clamp lever 16, the clamp lever 16 rotates in the direction of arrow f via the lever 16b.

The clamper 17, which has rotated in the direction of the arrow f, fits into the disc table 7, thereby clamping the front disc 2.

When the drive gear 11 continues to rotate further in the direction of the arrow a from this state, the relay lever 12 rotates slightly in the direction of the arrow, and in conjunction with this, the lift lever 5 is returned to the retracted position of the arrow a. The roller 6a separates from the peripheral edge of the first disk 2.

At this time, as the drive gear 11 rotates in the direction of arrow a,
Guide lever 15 is in the direction of arrow C, sub guide lever 13
are returned to their respective retracted positions in the direction of arrow a (see FIG. 9).

This puts the device into standby mode and starts playing.

Note that when the optical disc 2 is returned to the disc storage 1 at the end of a performance, etc., the drive gear 11 rotates in the direction of the arrow, so the series of operations of each component described above is performed in reverse. ing.

Thus, according to the disc playback device of this embodiment, the ejecting operation, the clamping operation, and the retracting operation of the optical disc 2 are performed in conjunction with each other by the respective cams provided on the - drive gears 11. switching can be performed at good timing. Also, from this point of view, the limits for switching at each movement amount that were conventionally used are
Soto switch can be omitted.

Furthermore, the operation of taking out the optical disc to be played from the retracted position and transporting it to the performance start position by the rotation of the drive gear 11, the operation of clamping the optical disc at the performance start position,
Since the evacuation operations when the optical disk is clamped are linked, the motors dedicated to each operation, which were conventionally used, can be omitted.

Furthermore, since the optical disc 2 is stored and played vertically, it is possible to prevent the outer periphery from bending due to the weight caused by horizontal storage and horizontal performance in conventional disc playback devices.

Further, in this embodiment, an arcuate groove 2a is formed along the outer shape of the optical disc 2 so that each optical disc 2 can be removably supported from the vertical direction at the bottom of the disc storage container l, and a guide lever 15 and a sub guide 14 are formed. An arcuate groove 15B and a guide groove 14a are formed in each of the grooves, and the optical disc 2 is conveyed along each guide groove to the performance start position. Conventional horizontal storage requires a tray for each. The use of that tray can also be omitted.

[Effects of the Invention] As explained above, according to the disc playback device of the present invention, the reliability of the mechanism can be improved with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing a disc playback device according to an embodiment of the present invention, FIG. 2 is a side view showing a search state of a disc playback unit of the same disc playback device, and FIG. FIG. 4 is a plan view showing the drive gear of the disc playback unit; FIG. 5 is a sectional view showing the guide groove for guiding the optical disc in the disc playback unit; FIG. 6 is a side view showing the optical disc being pushed up; A side view showing a state in which the optical disc is clamped by the disc reproducing unit; FIG. 7 is a partially cross-sectional side view showing the state before the clamping mechanism of the disc reproducing unit completes clamping; FIG. 8 is a clamping state of the disc reproducing unit. FIG. 9 is a side view in partial section showing the state at the time of completion, FIG. 9 is a side view showing the playing state of the disc playback unit, and FIG. 10 is a cam diagram of the drive gear of the disc playback unit. 2... Double-sided playback optical disc, 5... Lift lever 7... Disc table, 8... Disk drive motor, 9... Mechanical chassis, 10a, 10b... U-shaped guide rail, 11-・・Drive gear, lla, llc
. 11d... cam groove, 11b... cam, 12a...
Relay lever pin, 12...Relay lever 13a...
Guide lever bin, 13...Sub guide lever 14
a...Guide groove, 14...Sub guide, 15a...
・Arc-shaped groove, 15b...Guide lever pin, 15・
...Guide lever 16...Clamp lever 16a...
・Clamp bin, 17... Clamper applicant Toshiba Corporation

Claims (2)

[Claims] (1) A disc playback device that plays back data from a double-sided playback type optical disc, comprising: a disc transport means for transporting the optical disc to a predetermined data playback position; a disc holding means for holding the optical disc at a data reproduction position; switching from a transporting operation of the disc transporting means to a holding operation of the disc holding means, and transporting the disc when the optical disc is held by the disc holding means; 1. A disc playback device comprising: a drive gear having a cam having a predetermined shape corresponding to each switching operation for switching to a retracting operation for retracting the means. (2) A disc playback device that plays back data from a double-sided optical disc, which has an arc-shaped groove along the outer shape of the optical disc at the bottom, and supports each optical disc in a vertically removable manner. a disc storage device for vertically guiding the optical disc taken out from the disc storage device to a predetermined data playback position while maintaining the vertical state; 1. A disc playback device comprising a disc holding means for holding the disc in a fixed state.