JPS6018854A - 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 shifting a clamper part vertically to a disk by a clamper attachment body containing a guide mechanism in response to the loading action of a disk storing unit to perform the clamping and releasing actions. CONSTITUTION:For a clamper attachement matter 41, a slide pin 46 is energized toward A by a control groove 40 of a disk storing unit 14 and guide pins 42 and 43 are guided by guide holes 25 and 26 of a main chassis 20 to the upper part. Then the engagement is released between the matter 41 and a turntable 30 via a clamper part 48. Then the shift of the matter 41 is stopped toward A when the pins 42 and 43 touch the end parts of the holes 25 and 26 respectively. A disk 50 is shifted in the direction A and loaded and unloaded at a disk loading/unloading position.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an improvement of an ice flap flange mechanism of an optical disc record playback device suitable for an optical DAD (digital audio disc) system. The problem] In recent years, in the field of audio equipment, PCM (/'4' Russo Court Modulation) is being used to achieve as high fidelity as possible.
Digital recording and reproducing methods using technology have emerged and are becoming popular. In other words, this is what is called digital audio, and the principle is to make the audio characteristics much better than the conventional analog system, which often depends on the characteristics of the recording medium. This is because it has been established. In this case, a system that uses a disk as a recording medium is called a DAD system, and optical, electrostatic, and mechanical reproduction methods are also known. Regardless of which of these regeneration methods is adopted, the regeneration device that embodies it is still required to be capable of satisfying advanced functions and performance that are not found in conventional methods. Ru.

For example, in an optical disc record playback device that uses the CD (Continuous Disk) method among optical playback methods, the digital (PCM)
12 cm in diameter, coated with a metal thin film that forms I-targets (irregularities with different reflectances)
, an optical disk with a thickness of 1.2 mm is driven at a variable rotational speed of about 200 to 500 r, p, m by a CLV (constant linear velocity) method. In this case, this disc requires various advanced functions and performance because the track pitch is 1.6 μm and it stores a huge amount of information that can be played in stereo for about an hour on one side. It is easy to understand that.

And what about the above optical disc record playback device? The next requirement is to ensure that each mechanical part can operate reliably with an organic and simple configuration with no waste, promote miniaturization, and take precautionary power-saving measures to reduce power consumption. The goal is to further improve the results.

By the way, one of the specific targets of such requests is the disc loading mechanism.In other words, there are two types of disc loading mechanisms: vertical and horizontal. Although it is said that a horizontal type is more advantageous in terms of drive controllability, the horizontal type does not have the simplest possible configuration and the ability to achieve high precision. .

In this case, it is not only necessary to simply load the disc horizontally, but also to meet various demands of the optical disc record playback device as a whole in relation to the disc playback mechanism including the disc clamp mechanism. It doesn't show itself unless it's something.

[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 comprises a turntable on which an optical disc is mounted, and a disc storage unit that is horizontally loaded into and taken out of a cabinet, and a disc storage unit that is provided in the cabinet. When it is turned on, the turntable is turned on.
a clamp/flat member for clamping the optical disc that has been opened and releasing the clamp when the optical disc is in an extended state, and a clamper/flat member that is provided between the clamper member, the disc storage unit, and the cabinet, and is used to prevent the disc storage unit from entering and exiting the disc storage unit. The present invention is characterized by comprising a guide mechanism that interlocks with the guide mechanism to guide the clamper member in the axial direction of the turntable.

[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 disc record reproducing apparatus to which the present invention is applied, and numeral 1 indicates a cabinet. The four channels on the front side of this cabinet 11 have loading mechanisms for DA and D (hereinafter referred to as disks).
Arrow A in conjunction with the operation of JI (CT) key 13.

It is a generally rectangular disk storage unit that is installed in a so-called horizontal loading type that can be freely entered and exited in direction B).
A disk (not shown in FIG. 1) is placed horizontally on the disk 14, and the disk is loaded in a substantially horizontal manner to a disk drive position for reproduction, the details of which will be described later.

Note that 15 in FIG. 1 is a power (POWgR) key that is operated prior to operating the eject key 13, and hereinafter, on the upper right side of the loading mechanism section, there is a display section 16, and a display section 16 for play operation. Takeshi's PLAY key 17 and STOP key 17
P) An operation unit U in which the key 18 is arranged, and each f44 operation key such as a repeat key and a pause key is installed below it.
is assigned.

FIG. 2 shows the disc loading mechanism section 12 taken out, and 20 in the figure is a main chassis that is installed in the gear vignette 1 and includes a disc clamp mechanism, the disc accommodation unit 14, etc. be.

That is, in the main chassis 20, a pair of guide rollers 21, 22, 23, .
24 is rotatably supported, and the disk clamp mechanism l111 is arranged at a predetermined interval near the upper part of the guide rollers 21, 22, and 23, and 24 on the entrance and exit sides.
Guide holes 25.26 and 27.28 are provided. Here, these guide holes 25, 26 and 27 t 21? For example, each of them is inclined downward in the depth direction from the entrance/exit side (front side), and both ends thereof are each formed in a stepped shape substantially parallel to the entrance/exit direction.

In addition, the disc storage unit 14, which is configured to be attached to the main chassis 20 so as to be freely removable and removable, has a stepped portion 29 for placing a disk on its upper surface, and a turntable is provided approximately in the middle of this stepped portion 29. 30 is rotatably arranged.

A protrusion 3 corresponding to the center hole of the disk is formed at the tip of the turntable 30, and the base end thereof is shown in the figure. (not shown).

Further, a through hole 32 for transmitting laser light is formed in the stepped portion 29 in the depth direction from the turntable 30 to the outer periphery of the path, and a pair of four portions 33.3 for attaching and removing a disc are formed.
4 are formed at both ends of the disk storage unit 14 at positions substantially perpendicular to the loading/unloading direction.

The disk storage unit 14 has a disk playback mechanism section (not shown) in which an optical pizzazzle 35 is movably disposed on the back surface corresponding to the through hole 32.
is installed and configured.

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

In addition, 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 of which is shown in the drawing) at both ends of the guide roller 21.
22 and 23.24 are formed up to the extension portions s6 and 37, and these rails 38 are guided by the guide rollers 21.22 and 23.24 to the main chassis 20 as shown by the arrow A.

It can be freely entered and exited in direction B.

Further, the disc housing unit 14 has guide grooves 39 (only one of which is shown in the figure) for guiding the disc clamp mechanism on the top of the rails 38 at both ends thereof, at a depth approximately from the rotation center axis of the turntable 30. They are formed at predetermined intervals in each direction. A drive regulating groove 40 is formed in the guide groove 39 so as to correspond to the rotation center axis of the turntable 300 and to be substantially parallel to the rotation center axis of the turntable 300.

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 41 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, the guide holes 25 of the main chassis 20 are formed on the outside of both ends of the clamper mounting body 41.
．． 26 and 27°10-28, guide pins 4'2, 43 and 44.
45 are respectively formed, and sliding pins 46 and 47, which are inserted into and engaged with the guide groove 39 of the disk storage unit 14, are formed inside thereof so as to face each other.

The clamper mounting body 41 has a clamper portion 48 made of a substantially cylindrical magnetic material at approximately the center of the bottom thereof, and is supported with an appropriate angle so as to correspond to the protrusion 31 of the turntable 30. be done. This crank/mother part 48 has a disc-suppressing collar part 49 formed at one end corresponding to the turntable 30, and its magnetic force causes the disc to be pressed against the protrusion 31 of the turntable 30 through the disc. The flange portion 49 presses the disc against the turntable 30 in the fitted state. At this time, the cranometer # part 48 is spaced apart from the cran''-mounting body 41, and is driven to rotate in conjunction with the rotation of the turntable 30.

That is, in the above configuration, with the disc 50 placed on the stepped portion 29 of the disc storage unit 14 as shown in FIG. When operated, a loading mechanism (not shown) is driven to load the disk storage unit 14 in the direction of arrow B.

And this disk storage unit, ) 14c Figure 3b
When loaded to the position indicated by K, the guide groove 39
The sliding pin 46 (only one of which is shown in FIG. 3) of the clamper mounting body 41 inserted into the clamper mount 41 comes into contact with the regulating groove 40 . Therefore, when the disk storage unit 14 is further loaded, the guide pins 42 and 43 (only one of which is shown in FIG. , 26 (only one is shown in FIG. 3) and begins to descend. When the loading of the disk housing unit 14 is completed, the crank/mother mounting body 41 is positioned so that the idle bins 42 and 43 are located at the lowest position of the guide holes 25 and 26, as shown in FIG. be done. As a result, the clamper part 48 of the cranometer mounting body 41 is fitted into the protrusion 31 of the turntable 30 via the disc 5o by magnetic force, and the disc 50 is attached to the turntable 30 by the collar part 49. At this time, the clamper portion 48 is spaced apart from the clamp/fitting body 41 and is rotatable as described above, and here, !
Disc playback is performed in conjunction with the operation of the Ray key 17.

Further, in the loading completion state as shown in FIG. Load in the direction of the arrow. At this time, as shown in FIG. 3, the sliding pin 46 of the clamper mounting body 41 is urged in the direction indicated by the arrow 7' (the regulating groove 40 of the block housing unit 14), so that the guide pin 13- 42 and 43 are guided to the guide holes 25 and 26 of the main chassis 2° and lifted up, and the crank/arm part 48 is unfitted to the turntable 3°. The body 41 is the guide pin 4
2.43 comes into contact with the end of the guide hole 25.26, its movement in the direction of the arrow is stopped. On the other hand, at this time,
Since the guide groove 39 of the disk housing unit 14 guides the sliding pin 46 of the clamper mounting body 41,
While the crank/arm attachment body 41 is stopped, it is further moved in the direction of the arrow and loaded to the disk attachment/detachment position shown in FIG. 3 aVC, where the disk 5o is attached or detached.

In this way, in the above-mentioned disc cranometer arm mechanism, the clamper mounting body 41 is attached to the disc accommodating unit 14.
- Is it driven in conjunction with the ding? Disk 50 with part 48 placed on turntable 30
14- to clamp and unclamp the disk 5θ. This allows the disc clamping mechanism to have a simple configuration, to be able to be combined with the disc loading mechanism as much as possible, and to improve its controllability. Figure 4, without limitation,
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 and 27.28 are provided in the clamp 4-attachment body 41, and the I-id pin 4 of the clamp 9-attachment body 41 is provided.
2.43 and 44.45 are provided on the main chassis 20.

Next, FIG. 5 shows the guide holes 25 and 26 of the main chassis 20.
and 2'1.28, the guide holes 25 and 27 on the depth side are further moved in the depth direction to form holes substantially parallel to the loading direction.

In addition, FIG. 6 shows that a spring member 51 that biases the clamper mounting body 41 in the depth direction is engaged, and the guide groove 39 and regulation groove 40 (see FIG. 2) of the disk storage unit 14 are connected to the clamp/arm. - It is configured to provide a guide surface 52 and a regulating surface 53 (only one of which is shown in the figure) on which the sliding pin 46.4'l of the mounting body 41 slides.

Note that in each of the above embodiments, the loading of the disk storage unit 14 is not limited to being automatically performed using the driving force from the driving source, but the loading may be performed manually as well. It is valid. Therefore, it goes without saying that various modifications can be made to the present invention without departing from the spirit of the invention.

〔Effect of the invention〕

As described above, it is an object of the present invention to provide an entire disc clamping mechanism for an optical disc record playback device that is as simple as possible and that 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 is an exploded perspective view showing a disc flang mechanism of the optical disc record playback device according to an embodiment of the present invention. Figures 3a, 3b and 3c are side views, 4th and 5th views showing the operating state of Figure 2, respectively.
FIG. 6 is an exploded perspective view showing a disc clamping mechanism of an optical disc record reproducing apparatus according to another embodiment of the present invention. 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, 30.
...Turntable, 31...Protrusion, 32...Toru 1
7 one hole, 33.34... recessed part, 35... optical big hole, 36.37... extension part, 38... rail, 3
9...Guide groove, 40...Regulation groove, 41...Cran/Group mounting body, 42.43.44.45...Guide pin, 46.41...[17 Hin, 48... ... part of clamp 9, 49 ... boxwood part, 50 ... disk, 51
... Spring member, 52 ... Guide surface, 53 ... Regulation surface. Applicant's agent Patent attorney Takehiko Suzue 18-

Claims (1)

[Scope of Claims] A disc housing unit that includes a turntable on which an optical disc is mounted and that can be loaded horizontally into and out of a cabinet; a clamper member that clamps the optical disc placed on the turntable when the storage unit is in the inserted state and releases the clamp when the storage unit is in the extended state; An optical disk record playback system characterized by comprising a guide mechanism provided between the f'4 disk storage unit and guiding the clamper member in the axial direction of the turntable in conjunction with the movement in and out of the f'4 disk storage unit. Disk flang mechanism of the device. 1-