JPS59195375A - Optical disk record reproducer - Google Patents

Abstract

PURPOSE:To guide assuredly the optical disks of different diameters to the driving position with a simple constitution by providing a disk size switching knob and a coupling mechanism which converts a position control part in response to the selected disk size. CONSTITUTION:A disk size switching knob 15 is operated toward C in order to load a disk 20 of a large diameter, and therefore an end of a control member 19 is shifted toward C via a sliding plate 18. At the same time, the member 19 is shifted toward E. Thus a control part 192 is shifted to the lower part in the figure via a guide hole 141. While a control member 22 interlocks the member 19, and a control part 222 is shifted to the lower part in the figure. When a knob 15 reaches a position shown by a solid line in the figure, a pole 25 of a guide part 221 is hooked to a knob groove 27 of a disk holder 12 and locked there. The disk 20 put into a pocket part 14 is supported by the parts 192 and 222 through the fringe part of the disk and then stored at a prescribed position. The knob 15 is operated toward D with a disk 21 of a small diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a disc record P 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, high fidelity (IJ =
Fig. Rutame pcM (]f Ruskot Mosoulation)
Digital recording and reproducing methods using technology have emerged and are becoming popular. This is called digital audio conversion, and the principle is to make the audio characteristics independent of the characteristics of the recording medium and to be far superior to the conventional analog system. This is because it has been established. In this case, a system that uses a disk (disk) as a recording medium is called a DAD system, and its reproduction methods include optical, electrostatic, and mechanical systems. Regardless of which of these playback methods is adopted, the playback device that embodies it must be able to satisfy various advanced functions and performances not found in conventional devices. required.

For example, in an optical disc record playback device using the CD (compact disc) method among optical playback methods, pits (irregularities with different reflectances) corresponding to digitized (PCM) data are formed on a transparent resin disk. Made of metal thin film coated with diameter 12c1nx thickness 1.
It is made by driving two carp optical discs at variable rotational speeds of approximately 200 to 500 r, p, m using the CLV (constant 10 speed) system. In this case, the above-mentioned disk has a track pitch of 1.6 μm and contains a huge amount of information that can be played in stereo for about 1 hour, so it is equipped with various advanced functions and performances. This is easy to understand.

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

By the way, a specific example of the additional functions required in this way is the appearance of optical discs of different diameters (for example, smaller diameters) with different information storage capacity compared to the 12 Crn diameter disc.

However, in a device like this that handles multiple discs with different diameters, it is not enough to just be able to attach and remove discs with a single diameter from the turntable, but it is also important to understand the relationship between the disc drive mechanism and loading mechanism. The optical disc record playback device as a whole must be able to meet various demands.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and provides an extremely good optical disc record playback device that has a simple configuration and is capable of reliably guiding optical discs of different diameters to drive positions. The purpose is to

[Summary of the invention]

That is, the present invention provides a disc holder that is installed in a cabinet and can accommodate optical discs of different diameters, a disc size switching operator that is installed on the outside of the disc holder, and a disc size switching operator that is linked to the disc size switching operator. a coupling mechanism that moves the first and second position regulating parts in accordance with the selected disc size, the first and second position regulating parts being connected to the disc size switching operator; It is characterized in that it is provided so that it is interlocked and shifted at smaller intervals than those of smaller disk sizes.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. That is, Fig. 1 shows the DAD (hereinafter referred to as disk) loading section of an optical disc record playback device taken out, and numeral 12 in the figure is a disk holder installed on the front panel of cabinet 1 so that it can be opened and closed. be.

This disk holder 12 has a so-called loop-pocket type can that is rotatably loaded in the direction of arrow A in conjunction with the operation of the eject operator 13. (not shown in FIG. 1) are inserted into the pocket portions 14 in a substantially vertical manner.
A holder cover 16 having a disk size switching operator 15 is provided on the outside thereof. When inserting the discs of different diameters into the pocket portions 14 of the disc holder 12, the user operates the disc size switching operator 15 to a predetermined state to insert the discs of different diameters into the respective pockets 14. It is made to face the turn team 17 at the insertion position b
The details will be explained later.

In this case, the disk holder 12 moves each disk to a vertical drive position in conjunction with the loading, and moves the disk to a disk crank (not shown in FIG. 1).
It is adapted to be attached to and detached from the turntable 17 via.

FIGS. 2(a) and 2(b) respectively show the disc holder 12 taken out, and 15 is the disc size switching operator. That is, the disc size switching operator 15 is guided by a guide hole 161 (see FIG. 1) provided at the lower part of the holder cover 16 and slides in the directions of arrows C and D, approximately perpendicular to the disc insertion direction. It is freely provided, and a sliding shaft 151 is formed at its lower end. A sliding plate 18 is fixed to the base end of this sliding shaft 151, and this sliding plate 1sK has a long hole 18 formed to correspond to the guide hole 161 of the holder cover 16 (see FIG. 1). .

Here, one end of a substantially V-shaped first disc positioning regulating member 19 is rotatably supported on the lower surface of the distal end of the sliding plate 18 with a shaft 19 interposed therebetween. The first regulating member 19 is formed at its other end with a regulating part 192 for supporting disks corresponding to the peripheral edges of the large-diameter and small-diameter disks 20 and 21, and this regulating part 192 is similar to the figure of the pocket part 14. It is inserted into a first guide hole 14 formed on the right side of the center in a curved shape with respect to the disk insertion direction.

Further, on the upper surface of the sliding plate 18, one end portion of a substantially V-shaped second disc positioning regulating member 22 is placed. The second regulating member 22 has a hollow guide portion 22 formed at one end thereof to be inserted into the elongated hole 181 of the sliding plate 18, and the large diameter and small diameter disks 20 at the other end. A regulating portion 222 for supporting the disk is formed corresponding to the peripheral edge of the disk 21 . The regulating portion 222 is inserted into a second guide hole 142 formed in a substantially curved shape corresponding to the first guide hole 141 on the left side of the pocket portion 14 in the drawing. The button is provided so as to protrude substantially symmetrically to the regulating portion 192 of the first regulating member 19 with respect to the shaft.

A guide groove portion 23 is formed in the disc holder 12 at a predetermined position approximately in the center thereof, corresponding to the disc insertion direction. This guide groove portion 23 has a guide portion 24 indicated by arrow E.
The first and second regulating members 19 and 22 are movably movable together in the F direction, and substantially central portions of the first and second regulating members 19 and 22 are rotatably supported by the guide portion 24, respectively.

Here, the disk size switching operator 15 can freely slide between a first position shown by a solid line in the figure and a second position shown by a chain double-dashed line in the figure corresponding to the large diameter and small diameter disks 20, 211C. The levers are provided in a manner that locks them in their respective operating positions. In this case, the second regulating member 22 has a locking ball 25 in its guide portion 22.
is provided via the spring member 26.
25 is adapted to be locked in the first and second locking grooves 27.2B of the disk holder 12 at the first and second operating positions of the disk size switching operator 15.

In this case, the respective regulating portions 192, 222 of the first and second regulating members 19° 22 are connected to the first and second guide holes 14.
Since the interval of 1.142 mm is smaller than the diameter of the small-diameter disk 2, the small-diameter disk 21 is always used regardless of the first and second operating positions of the disk size switching operator 15. The spacing is smaller than the diameter of the

That is, the disk holder 1 configured as described above
2, as mentioned above, the user selectively operates the disk size switching operator 15 in the direction of arrow C or D in the figure depending on whether the user is installing a large diameter disk 20 or a small diameter disk 2. being done. For example, when the disk size switching operator 15 is operated in the direction of arrow C in the figure to install a large-diameter disk 2°, its sliding shaft 151
One end of the first regulating member 19 is moved in the same direction via the sliding plate 18 supported by. As a result, the first regulating member 19 is moved in the direction of the arrow E by the guide groove 23 with the guide portion 24 at the substantially central portion of the first regulating member 19.
92 is guided to the first guide hole 141 and moved to the lower part in the figure. On the other hand, the second regulating member 22 has a substantially central portion that is interlocked with the first regulating member 19 via the guide portion 24, so that the regulating portion 222 is connected to the second guide hole 1.
42 and is moved to the lower part of the figure. When the disk size switching operator 15 reaches the position shown by the solid line in the figure, the guide portion 22 of the second regulating member 22
The ball 25 of the disk holder 12 is locked by being locked in the first locking groove 22 of the disk holder 12, and the large diameter disk 20 inserted into the pocket portion 14 has its peripheral edge aligned with the first locking groove 22 of the disk holder 12. The second regulating member 19.22 is supported by each regulating portion 192.222 of the second regulating member 19.22 and housed in a predetermined position.

Further, when the disk size switching operator 15 is operated in the direction of the arrow in the figure to install a small-diameter disk 2, the first regulating member is moved through the sliding plate 18 supported by the sliding shaft 151. One end of 19 is moved in the same direction. As a result, this first regulating member 19 has a guide portion 2 at its approximately central portion.
4 is guided by the guide groove portion 23 and moved in the direction of the arrow F, the regulating portion 192 thereof is guided by the first guide hole 141 and moved to the upper part in the figure. On the other hand, the second regulating member 2
2 has a substantially central portion interlocking with the first regulating member 19 via the guide portion 24, so that the regulating portion 22
2 is guided to the second guide hole 142 and the upper switching operation element 15 in the figure reaches the position shown by the two-dot chain line in the figure, the pole 25 of the guide part 221 of the second regulating member 22 touches the disc bolt. -12, the small diameter disc 21 is inserted into the pocket 14iC and its peripheral edge is connected to the first and second regulating members 19. It is supported by each regulating part 192° 222 of .22 and housed in a predetermined position.

As described above, the optical disc record playback device has a disc size switching operator 15 that is selectively operated according to the size of the disc 20, 21 disposed on the outer side of the disc holder 12, and furthermore, the regulating part 192. 222 is always configured to be smaller than the diameter of the two small diameter disks. Therefore, the optical disc record reproducing apparatus allows the disc size switching operator 15 to be operated after the disc is inserted, and can be handled very easily in the event of a disc being inserted incorrectly.

Furthermore, the present invention is not limited to the above-mentioned embodiment, but can also be effectively configured as shown in FIG. It is provided so as to be freely operable in the directions of arrows G and H. In this case, the disk size switching operator 15 has a substantially concave sliding plate 30 provided so as to surround the disk clamper 29 supported at its base end, and in conjunction with the operation, the sliding plate 30 30 in the directions of arrows G and H. At this time, the sliding plate 3o presses the ends of the first and second regulating members 31, 32 for disk positioning supported at both ends thereof in the same direction. Therefore, the first and second regulating members 91, 32 have their respective regulating portions 311, . 921 are rotated about the shaft 33 to correspond to the disc size.

Here, each of the above-mentioned regulating sections 311. :121 is pocket part 1
The small-diameter disk 21 formed at 4 is inserted into the first and second guide holes 141 and 142, which are spaced at small intervals. Irrespective of the first and second operating positions of the disks 2, the spacing is always smaller than the diameter of the small-diameter disk 2.

Note that the present invention is not limited to the vertical loading described in each of the above embodiments, but is equally effective when applied to horizontal loading.

Therefore, according to the present invention, it is possible to carry out various modifications without departing from the gist of the present invention, and the structure is very good in that it is possible to reliably guide optical disks of different diameters to respective drive positions. Accordingly, it is possible to provide an optical disc record playback device.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an optical disc record reproducing device according to an embodiment of the present invention, and FIG. 2(a), Tb)
are a plan view and a sectional view showing the details of Fig. 1, and Fig. 3, respectively.
The figure is a perspective view showing an optical disc record playback device according to another embodiment of the invention. 1... Cabinet, 12... Disc holder, 13... Eject operator, 14... Pocket portion, 15... Disc size switching operator, 16... Holder cover, 17... Turntable, 18...
Sliding plate, 19... first regulating member, 20... large diameter disk, 2... small diameter disk, 22... second
regulation member, 23... guide groove part, 24... guide part,
25...? -Role, 26...Spring member, 27.
...First locking groove, 28...Second locking groove, 29...
・Disc crank, 3σ...sliding plate, 3...
・GL regulation member, 32...Second regulation member, 33.
··shaft.

Claims (1)

[Claims] Choose from a disc holder installed in the cabinet that can accommodate optical discs of different diameters, a disc size switching operator installed on the outside of this disc holder, and a disc size switching operator that is linked to this disc size switching operator. The first and second disk sizes correspond to
a coupling mechanism for displacing the position regulating portions of the disk, the first and second position regulating portions being moved at a spacing greater than that of a smaller disk size in conjunction with the disk size switching operator. An optical disc record playback device characterized by: