JPS6050748A - Reproducer of optical disk record - Google Patents

Abstract

PURPOSE:To improve the protecting performance and operability of an optical disk by correcting the position of the disk by a coaction of both the sloping part and the control part of a tray and the control part of a cabinet in response to a loading action of the disk when the disk is stored erroneously. CONSTITUTION:A disk 25 is stored erroneously to a disk store part 16 of a tray main body 13 with the disk stuck out toward an end of the part 16, and an ejection key is operated. In such a case, the fringe part of the disk 25 touches an end of an opening part 22 of a front panel 12 and receives a position correction as the disk is loaded toward an arrow B. At the same time, the rear edge part of the disk touches a control part 21. Thus the disk 25 is slightly shifted toward an arrow C. Then the disk 25 touches a right projection part 24 to receive a position correction. Therefore the disk 25 is shifted more toward C as it is loaded. Then the disk 25 is guided by a sloping part 20 of the part 16 and receives a position correction to the store part 16. Thus a loading action is ended with the disk 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of an optical disc record playback device suitable for an optical DAD (digital audio disc) system.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, a digital recording and reproducing system using PCM (pulse coat modulation) technology has appeared and is becoming popular in order to achieve as high fidelity as possible. This is called digital audio, and the audio characteristics do not depend on the characteristics of the recording medium, which is much better than the conventional analog system.
This is because it is established in principle that it should be excellent. In this case, a disk (disk) is used as the recording medium.
The system that targets is called the DAD system.
Optical, electrostatic, and mechanical playback methods are known, and no matter which of these playback methods is adopted, the playback device that embodies it cannot be used. They are required to be able to satisfy various advanced functions and performances not found in conventional products.

For example, in an optical disc record playback device that uses the CD (compact disc) method among optical playback methods, a digital (PCM) disc is used instead of a transparent resin disc.
) An optical disc with a diameter of 12 c/n and a thickness of 1.2 cm is coated with a metal thin film that forms pits (irregularities with different reflectances) corresponding to the conversion data using the CLV (constant linear velocity) method. It is driven at variable rotational speeds of about 200 to 500 r, p, m. In this case, the disk described in item 1 has a track pitch of 1.6 μm and contains an enormous amount of information that can be played in stereo for about an hour, so it has extremely advanced functions and performance. It is easy to see why they are prepared.

The next requirement for the above-mentioned optical disc record playback device is to organically combine additional functions in accordance with various requirements with each mechanical part in a simple configuration in order to further improve functionality and performance. The objective is to ensure that the various requirements are satisfied.

By the way, specific examples of additional functions include cases where the handling of the disc is improved and protection measures such as damage prevention are further promoted.

In other words, in such an optical disc record playback device, for example, if a disc is loaded incorrectly and the disc is loaded, the disc may be damaged. It is an object of the present invention to provide a device with a simple configuration that allows loading to be performed, without increasing its size, and to facilitate improvement in handling and protection measures.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and is an extremely good optical disc that has a simple structure, promotes protection measures for optical discs, and makes it possible to improve the handling properties of optical discs. [Summary of the Invention] That is, the present invention provides an optical disc record reproducing device in which a tray containing optical discs in a substantially horizontal manner is loaded horizontally into and out of a cabinet. In the disc record playback device, the tray is provided with a wide inclined part for guiding the disc and a regulating part for regulating the position of the disc in a direction perpendicular to the loading/unloading direction corresponding to the disc storage part thereof, and the cabinet is provided with a wide slope part for guiding the disc and a regulating part for regulating the disc position. On the other hand, a regulating part for regulating the disc position is provided in the entrance/exit part corresponding to the disc accommodating part of the tray, and when the optical disc is incorrectly accommodated, the inclined part of the tray and the regulating part are moved in conjunction with loading. The present invention is characterized in that the position is corrected by cooperation with the regulating section of the cabinet.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 are CDs to which this invention is applied, respectively.
This figure shows the disc loading mechanism of the type optical disc record playback device.

That is, the disk loading mechanism section 1 has a tray main body 13 which accommodates an optical disk (not shown in FIGS. 1 and 2) in a substantially horizontal manner with respect to the front panel 12 of the cabinet 1. is disposed such that it can be moved in and out in the directions of arrows (4) and (B) via a four-way mechanism (not shown). This tray body 13 is connected to the eject key 1 provided on the front panel 12.
4, the loading mechanism is driven to a predetermined state and the disk is guided by the idle rail 15 (see FIG. 2) to the disk loading/unloading position and the driving position.

Here, a mechanism for preventing erroneous disk loading, which is constructed for the disk loading mechanism section, will be explained.

In this case, first, the tray main body 13 in which the disk is accommodated in a substantially horizontal manner has a generally concave disk accommodating portion 16 formed on the upper surface thereof in a generally circular shape corresponding to the disk, and a disk accommodating portion 16 for attaching and removing the disk. Concave portions 17 and 1B are formed near both ends of the disk housing portion 16 corresponding to the maximum diameter portion thereof. Among these, the disk housing portion 16 has a through hole 1 for transmitting laser light extending in the depth direction from approximately the center of the bottom surface.
9 is formed corresponding to a turn-take widening optical peak-up (not shown), and a disc guiding inclined part 20 is formed inwardly along the inner periphery of the tip of the disc guiding part 20.
The front side is eccentrically formed to be wide in both end directions with respect to 7°18. Further, the tray main body 13 has a regulating part 21 for regulating the disc position that engages with the peripheral edge of the disc.
is provided protrudingly on the front side corresponding to the above-mentioned inclined portion 20 on the upper surface.

On the other hand, the front panel 12 has an opening 2 for tray entry and exit.
A pair of protrusions 23 and 24 for regulating the disk position are formed at the upper end of the opening 22 at a position recessed from the front surface of the opening 22 at the maximum diameter portion of the disk accommodating portion 16 of the tray body 13. are formed at narrower intervals.

In this case, these protrusions 23 and 24 have a distance K between their tips and the upper surface of the tray body 13 (see FIG. 2).
The thickness of the above-mentioned disk is 1.2 m) The rainbows are also formed at narrow intervals.

That is, in the above configuration, as shown in FIG. 3, the optical disc 25 may be incorrectly accommodated in such a way that it protrudes toward one end (to the right in the figure) with respect to the disc accommodating portion 16 of the tray body 13. , when the eject key 14 is operated, as the eject key 14 is loaded in the direction of the arrow CB), its peripheral edge comes into contact with one end of the opening 22 of the front panel 12 as shown in FIG. , because the peripheral edge on the rear end side comes into contact with the regulating part 21, it will be slightly marked by the arrow (C
Moved in one direction. -) [7, - the above disk 25
When it is further loaded in the direction of the arrow (G) shown in FIG. As the disk 25 is loaded, it is further moved in the direction of the arrow (0) as it is loaded.As shown in FIG. Arrow (C
When the disc is moved in the five directions, it is guided to the inclined part 2o of the disc accommodating part 16 and corrected and accommodated in the disc accommodating part 16. As a result, when the loading of the tray main body 13 in the direction of arrow (B) is completed, the disk clamp 25 is clamped to the turntable in a playable state by a disk clamper mechanism (not shown). You can enjoy disc playback in conjunction with a play key (not shown).

Furthermore, if the disk 25 is incorrectly accommodated in such a way that it protrudes toward the other end (left side in the figure) with respect to the disk accommodating portion 16,
The other end of the opening 22 of the operation panel 12 and the protrusion 23 on the right side in the figure, the regulating part 21 and the inclined part 2 of the tray body 13
In almost the same way as the correction operation described above, in cooperation with o,
It is corrected and stored in the disk storage section 16, and its explanation will be omitted here.

In addition, although the opening 22 for tray entry and exit formed in the operation panel 12 of the cabinet 11 is also used for disc position regulation in the above (in the embodiment), the opening 22 is not limited to this, and for example, for the operation panel 22 It is equally effective to provide a dedicated disc position regulating part on the outside of the loading track of the tray body 13 so as to face the peripheral edge of the disc 25 and correspond to the disc accommodating part 16.

As described above, the disk misloading prevention mechanism includes a wide inclined portion 20 for guiding the disk and a regulating portion 21 for regulating the disk position in the disk housing portion 16 of the tray body 13 in a direction perpendicular to the direction of insertion and ejection. and front panel 1
2, a projection 23.2 for disc position regulation corresponds to the disc accommodating part 16 at a predetermined position of the opening 22.
4 is provided, and the position of the disk 25 that has been incorrectly accommodated is corrected by the cooperation of the disks 25 during loading, thereby preventing incorrect mounting. This makes it possible to reliably prevent the disc 25 from being erroneously mounted, thereby making it possible to improve the protection measures for the disc 25 and the ease of its handling.

〔Effect of the invention〕

As detailed above, according to the present invention, with a simple configuration,
Furthermore, it is possible to provide an extremely good optical disc record playback device that promotes protection measures for optical discs and improves their handling properties.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an optical disc record playback device showing an embodiment of the present invention, FIG. 2 is a sectional view of FIG. 1,
3 to 6 are plan views showing the operating state of FIG. 1, respectively.・・Guide rail, 16°°° disk housing part, 11. 18... Recessed part, 19... Through hole, 20・
... Inclination part, 21 ... Regulation part, 22 ... Opening part, 2
3.24... Protrusion, 25... Disc.

Claims (1)

[Claims] In an optical disc record playback device in which a tray containing optical discs in a substantially horizontal manner is loaded into and out of a cabinet in a horizontal manner, the tray is orthogonal to the loading/unloading direction corresponding to the disc housing portion of the tray. A sloping part for guiding the disc and a regulating part for regulating the disc position are provided, and a regulating part for regulating the disc position is provided in the entrance/exit part of the cabinet so as to correspond to the disc accommodating part of the tray. and the optical disc is configured such that when the optical disc is incorrectly accommodated, the position is corrected by cooperation of the inclined part and the regulating part of the tray and the regulating part of the cabinet in conjunction with loading. type disc record playback device.