JPS6018853A - Disk clamping mechanism for optical disk record reproducer - Google Patents

Abstract

PURPOSE:To simplify a clamping mechanism with connection secured to a disk loading mechanism and at the same time to improve the control performance of the clamping mechanism, by securing an interlocking operation between a clamper attachment body containing an energizing means and a loading action of a disk storing unit and shifting a clamper part vertically to a disk to clamp and release the disk. CONSTITUTION:A clamper attachment body 40 receives the force of a spring member 47 in direction A, and a slide pin 45 touches the end part of a guide groove 39 of a disk storing unit 14. Thus guide pins 41 and 42 are guided by guide holes 25 and 26 of a main chassis 20 to move upward in response to a loading action of the unit 14 to release the engagement with a turntable 30 via a clamper part 51. Then the shift of the body 40 is stopped in the direction A when the pins 41 and 42 touch the end parts of the holes 25 and 26. Then a disk 35 is shifted more in the direction A and loaded up to a disk loading/unloading position. Thus the disk 35 is loaded and unloaded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a disc drive mechanism 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, digital recording and reproducing systems using PCM (Pulse Coat Modulation) technology have emerged and are becoming popular in order to achieve as high fidelity as possible. In other words, this is called digital audio, and the principle is to make the audio characteristics far superior to conventional analog systems without depending on the characteristics of the recording medium. This is because it has been established. In this case, is the recording medium a disk?
The target device is called a DAD system, and its reproduction methods include optical, electrostatic, and mechanical. Regardless of which of these playback methods is adopted, the playback device that embodies it must be able to satisfy various advanced functions and performance that are not found in conventional playback methods. be done.

For example, in an optical disc record playback device that uses the CD (conno-disc) method among optical playback methods, the digital (PCM)
) Bits corresponding to converted data (irregularities with different reflectance)
An optical disk with a diameter of 12 cnrs and a thickness of 1.2 tax, which is entirely coated with a metal thin film, is driven at a variable rotational speed of approximately 200 to 500 rpm using the CLV (constant linear velocity) method. . In this case, since this disc has a track pitch of 1.6 μm and contains a huge amount of information that can be played in stereo for about an hour on one side, various functions and performance such as sieving and performance are required. It is easy to understand what you need.

The next requirement for the above-mentioned optical disc record playback device is that each mechanical part can operate reliably with an organic and simple configuration with no waste, promote miniaturization, and reduce power consumption. Further improvements should be made to implement power saving measures to reduce the amount of electricity consumed.

Incidentally, one of the specific targets of such a request is a disk loading mechanism. In other words, there are two types of disk loading mechanisms: vertical and horizontal.The horizontal type is said to be more advantageous in terms of controllability of the disk drive, but the horizontal type This is because the formula does not achieve high accuracy with the simplest possible configuration.

In this case, it is not enough just to be able to horizontally load the disc into the fist, but it is also possible to meet various requirements for the optical disc record playback device as a whole in relation to the disc playback mechanism including the disc clamp mechanism. Must.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and provides an extremely good disc clamping mechanism for an optical disc record playback device that has the simplest possible configuration and ensures highly accurate control. The purpose is to

[Summary of the invention]

That is, the present invention includes a turntable on which an optical disc is mounted, a disc storage unit that is horizontally loaded into and taken out of a cabinet, and a disc storage unit that is installed in the cabinet, and a turntable that is equipped with an optical disc. a clamp/base member for clamping the optical disc placed on the turntable when the storage unit is in the put-in state and releasing the clamp when the storage unit is in the put-out state;
4, which is provided between the disk storage unit and the cabinet, and is interlocked with the movement in and out of the disk storage unit. The present invention is characterized by comprising a guide mechanism that guides one member in the axial direction of the turntable, and a biasing means that biases the one member of the crane 5/4' in the exit direction.

[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 external appearance of a CD-type optical disk record reproducing apparatus to which the present invention is applied, and 11 is a cabinet. A DAD (hereinafter referred to as disk) loading mechanism 512 is mounted on the front panel of the cabinet 11.
ECT ) arrow (A) in conjunction with the operation of key 13.

The disc (not shown in FIG. 1) is placed horizontally in the approximately rectangular disc storage unit 14, which is provided in a so-called horizontal loading type that can be freely moved in and out in the direction (B). The device is installed in a substantially horizontal manner at the disk drive position for playback, and the details will be described later.

In addition, numeral 15 in FIG. 1 is a PoR key which is operated prior to the operation of the eject key 13.
Hereinafter, on the upper right side of the loading mechanism section 6-12, a display section 16, a play (PLAY) key 17 for play operation and a stop (STOP) key 18 are arranged. An operation section 19 in which operation keys are installed is arranged.

FIG. 2 shows the disc loading mechanism section 12 taken out, and 20 in the figure is a main chassis installed in the cabinet 11 and configured with a disc clamp mechanism, the disc accommodation unit 14, etc. .

In particular, the main chassis 20 has a pair of guide rollers 21, 22 and 2 for guiding the disk storage unit 14 at predetermined intervals near the base at both ends thereof.
? , 24 are rotatably supported, and guide holes 25, 26 and 27 * 28 for driving the disk clamp mechanism are provided at predetermined intervals near the upper part of the guide rollers 21, 22, and 23, and 24, respectively, at predetermined intervals. provided. Here, these guide holes 25, 26 and 21, 28 are each inclined downward in the depth direction from the loading/unloading side (front side), and both ends thereof are each formed in a stepped shape approximately parallel to the loading/unloading direction. This is what is being done.

The disk housing unit 14, which is attached to the main chassis 20 so as to be able to move in and out of the main chassis 20, has a stepped portion 29 on its upper surface for placing a disk.A table 30 has a protrusion at its tip that corresponds to the center hole of the disk. 31 is formed, and its base end is connected to a motor (not shown) installed in the disk storage unit via a rotating shaft (not shown). Furthermore, a through hole 32 for transmitting laser light is formed in the step part 29 from the turntable 30 in the depth direction to the outer circumference of the path, and a pair of four parts 33 and 34 for attaching and removing the disc are formed in the loading/unloading direction. They are formed at substantially orthogonal positions up to both ends of the disk storage unit 14.

The disk housing unit 14 has the through hole 3.
A disk reproducing mechanism section (not shown) in which an optical pickup 35 is movably disposed is attached to the back surface corresponding to No. 2.

Here, in a state where the loading of the disk storage unit 14 in the direction of arrow (B) is completed, the disk playback mechanism section is driven by, for example, the laser beam emitted from the optical pickup 35 in conjunction with the play key 17. The light is completely transmitted through the through hole 32 and irradiated onto the signal recording surface of the disc, and the optical pickup 35 receives the reflected laser light again to reproduce the disc.

Furthermore, extending portions 36 and 37 for moving in and out are formed at both ends of the disk storage unit 14, corresponding to the main chassis 20, respectively. The disk storage unit 14 has guide rails 38 (only one shown in the drawing) at both ends of the guide roller 21.
The extending portions 36.37 are formed corresponding to 22 and 23.24, and these 9-rules 38 are guided by idle rollers 21.22 and 23.24 to the main chassis 20. opposite arrow (A),
It can be freely entered and exited in direction (B).

Furthermore, the disc housing unit 14 has guide grooves 39 (only one shown in the drawing) for driving the disc clamp mechanism on the upper part of the rails 38 at both ends thereof, extending in the depth direction from approximately the central axis of rotation of the turntable 30. Each is formed at a predetermined interval.

Next, it is configured to be attached to the main chassis 20,
The disk clamp mechanism that attaches and detaches a disk to and from the turntable 30 in conjunction with the insertion and removal of the disk storage unit 14 will be described. That is, a substantially U-shaped clamper mounting body 40 is installed on the main chassis 20 with both ends corresponding to each other, with the disk storage unit 14 configured to be freely removable and removable as described above. In this case, guide holes 25.26 and 27.2 of the main chassis 20 as described above are provided at both ends of the crank/arm attachment body 40 on the outside thereof.
Guide bins 41, 42 and 43, 44 are respectively formed to be inserted into the disk storage unit 8, and sliding bins 45, 46, which are inserted into and engaged with the guide groove 39 of the disk storage unit 14, are arranged inside thereof so as to face each other. Each is formed.

Further, one ends of spring members 47 and 48 are respectively engaged with both ends of the crank and hook attachment body 40 in the entrance/exit direction (front side). The other ends of these spring members 47 and 48 are connected to the spring engaging portions 49 and 50 formed in the main chassis 20 by the arrows (arrows) of the clamper mounting body 40f.
A) Direction (in/out side direction) K is engaged so as to be biased.

In addition, the clamper part 51 made of a substantially cylindrical magnetic material has an appropriate play at the substantially central part of the bottom surface of the crankshaft mounting body 40 so as to correspond to the protrusion 31 of the turntable 30. Supported. This clamper part 5 has a disk suppressing collar 52 formed at one end corresponding to the turntable 30, and its magnetic force causes the disk to be pressed against the protrusion 3 of the turntable 30 through the disk. When the disks are fitted together, the flange portion 52 is placed in pressure contact with the entire disk turntable 30. At this time, the clamp/mother part 5 is spaced apart from the clamper mounting body 40 and is driven to rotate in conjunction with the rotation of the turntable 30.

That is, in the above configuration, FIG. 3 (!L)
As shown in FIG. 2, when the ejector 13 is operated with the disc 53 placed on the stepped portion 29 of the disc storage unit 14, for example, to play the disc, a loading mechanism (not shown) is driven and the disc 53 is placed on the stepped portion 29 of the disc storage unit 14. Load 14″ft in the direction of arrow (B) force’.

This disk storage unit 14 is shown in FIG. 3(b).
When loaded to the position shown in , the guide groove 39
The sliding pin of the clamper mounting body 40 into which is inserted (
(only one of which is shown in FIG. 3) is brought into contact with the end portion. Therefore, when the clamper mounting body 40Irl and the disk storage unit 14 are further loaded, the guide bins 41 and 42 (FIG. 3) resist the biasing force of the spring member 42 (only one of which is fully shown in FIG. The main chassis 200 guide holes 25 and 26 (only one of them is fully shown) are guided by the inclined parts of the main chassis 200 guide holes 25 and 26 (only one of them is shown in FIG. 3) and begins to descend. Then, when the loading of the disk storage unit 14 is completed, the clamper mounting body 40 is moved to the third position.
As shown in the figure (,), the guide bins 41, 42fri
It is located at the bottom of the guide holes 25 and 26.

As a result, the clamper part 51 of the clamper mounting body 40 is fitted into the protrusion 31 of the turntable 30 via the disc 53 by magnetic force, and the disc 53 is attached to the turntable 30 by the collar 52. Pressure contact.

At this time, the Clasono 4 part 51 is separated from the clamper mounting body 40 as described above and is rotatable, and the disc is played back in conjunction with the operation of the Zoray key 1713-. .

Further, in the loading completed state as shown in FIG. 3(c), when the eject key 13 is operated again to remove or attach the disk 53, the loading mechanism is reversely driven and the disk housing unit 14 is moved toward the arrow (
A) Loading in the direction. At this time, Fig. 3(b)
As shown in , the clamper mounting body 40 receives the biasing force of the spring member 47 in the direction of arrow (A), and the sliding pin 45 is brought into contact with the end of the guide groove 39 of the disk storage unit 14. Because of this, the guide bin 4 is linked to loading.

42 is guided into the guide holes 25 and 26 of the main chassis 20 and raised, and the fitting to the turntable 30 by the clasp portion 5 is released. Then, when the guide pin 41.42 of the clamper mounting body 40 comes into contact with the end of the guide hole 25.26, the clamper mounting body 40 moves as shown by the arrow (A).
Movement in the direction is stopped. On the other hand, at this time, the above disk 1
4- Since the guide groove 39 of the storage unit 14 guides the sliding bin 45 of the clamper mounting body 40, it is further moved in the direction of arrow (A) with the clamper mounting body 40 stopped. The disc 53 is loaded to the disc loading/unloading position shown in FIG.

In this manner, in the disk clamper mechanism, the clamper mounting body 40 is driven in conjunction with the loading of the disk storage unit 14, and the clamper portion 51 is driven.
is moved substantially perpendicularly to the disk 53 placed on the turntable 30 (in the axial direction of the turntable 30) to clamp and unclamp the disk 53. This allows the various disk clamps 14 to have a simple configuration, to be able to be connected to the disk loading mechanism as much as possible, and to improve the controllability thereof.

Here, the present invention is not limited to the above embodiments, but as shown in FIG.
The configuration shown in FIGS. 5 and 6 is equally effective. However, in each figure, the same parts as in the above-described embodiment are designated by the same reference numerals, and the explanation thereof will be omitted.

First, FIG. 4 shows the main chassis 20 described in the above embodiment.
The guide holes 25, 26, 27, and 28 are provided in the clamper mounting body 40, and the clamper mounting body 40 has an id pin 41.
．． 42, 43, and 44 are provided on the main chassis 2θ.

Next, FIG. 5 shows the guide holes 25 and 26 of the main chassis 20.
and 27, 28, the guide hole 25 on the depth side, and
? 7'i is further moved in the depth direction to form a hole substantially parallel to the loading direction.

Further, in FIG. 6, instead of the guide groove 39 in FIG. 5, a retaining portion 54 for driving the clamper mounting body 40 is formed on the upper surface of the disk housing unit 14, and the clamper mounting body 40 is In place of the sliding pins 45 and 46, a driving sliding portion 55 corresponding to the engagement s54 is formed on the crank i+-mounting body 40.

In addition, in each of the above embodiments, the loading of the disk storage unit 14 is not limited to automatically performed using the driving force from all drive sources, but the loading of the disc storage unit 14 may also be configured to be performed manually. It is effective for Therefore, it goes without saying that according to the present invention, many modifications can be made without departing from the gist of the invention.

〔Effect of the invention〕

As described above, it is an object of the present invention to provide an extremely good disk clamping mechanism for an optical disk record playback device that has the simplest possible configuration and ensures highly accurate control. purpose.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external appearance of an optical disc record playback device to which the present invention is applied, and FIG. 2 shows a disc clamp mechanism of the optical disc record playback device according to an embodiment of the present invention. Exploded perspective view, Figure 3 (a), (b) and (c)l
dA side view showing the operating state of FIG. 2, and FIGS. 4, 5, and 6 are exploded perspective views showing the disc clamping mechanism of an optical disc record playback device according to other embodiments of the present invention, respectively. It is. DESCRIPTION OF SYMBOLS 11... Cabinet, 12... Disc loading mechanism part, 13... Eject key, 14... Disk accommodation unit, 15... Power key, 16...
・Display section, 17... Play key, 18... Stop key, 19... Operation section, 20... Main chassis,
21.22.23.24... Guide roller, 25.2
6.27.28... Guide hole, 29... Step part, 30.
...Turntable, 31...Protrusion, 32...Through hole, 33.34...Concave part, 35...Optical pickup, 36.37...Extension part, 38...Rail , 39
...Guide groove, 40...Clamper mounting body, 4th. 42.43.44...Guide bin, 45.46...
Sliding pin, 47.48... Spring member, 49.50...
・Spring engaging part, 51... Clamper part ・52... Flam part, 53... Disk, 54... Engaging part, 55...
...18- Sliding part.

Claims (1)

[Claims] It has a turntable on which an optical disc is mounted, and includes a disc storage unit that can be loaded horizontally into and out of the cabinet, and a disc storage unit that is installed in the cabinet and that is in the loaded state of the disc storage unit. a clamper member that clamps the optical disc placed on the turntable and releases the clamp in an extended state; and a clamper member that is provided between the clamper member, the disc storage unit, and the cabinet; A guide mechanism that guides the crank/A' member in the axial direction of the turntable in conjunction with the movement in and out of the storage unit, and a biasing means that urges the crank/4' member in the exit direction. A disc flange mechanism for an optical disc record playback device characterized by: