JPS6257157A - Disk loading device - Google Patents

Abstract

PURPOSE:To make a device small in size and simple by fixing a motor at a position where it is rotated by 180 deg. centering around an axis intersecting orthogonally with its revolving shaft, and fixing a disk by a clamper provided on the opposed position of one of two turntables. CONSTITUTION:A turntable device 11 for a video disk VD and a digital a turntable device 12 for a audio disk DAD are provided on one end of the spindle 29 of a spindle device 5, and on the other end, respectively. In this state, the spindle motor device 5 is rotated by 180 deg. centering around overturn shafts 3a, 3b by a motor overturn device 7, it is fixed at two positions before and after the rotation, and each disk can be fixed by the device 11 or the device 12, and a clamp device 47 opposed to said device. That is to say, the device 47 presses the device 11 by a movable plate 63 by which a revolving shaft 61 fixed to a clamper 60 is energized downward by a spring 62. Also, the center hole of the device 12 is fitted to a hub 65 for the disk, and its inside peripheral part is inserted and held, and fixed by a turntable 67 and a clamper 60.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention [Field of Industrial Application] The present invention relates to a disc mounting device, and more particularly to a disc mounting device that can mount discs with different hole diameters.

[Prior Art] So-called optical disc devices that optically read information recorded on a disc include video disc players and digital audio disc players (so-called compact disc players).

There is a difference in whether the information recorded on the disc is mainly a spliced video signal or only an audio signal, but the information recorded on the disc using pits can be recorded by optical means, e.g. They are substantially the same from the perspective of reading by the reflected light from the disk of the irradiated laser beam.

With this in mind, and with the aim of standardizing parts, etc., an optical disc device that plays back both discs in one unit has been proposed, for example in Japanese Patent Application Laid-Open No. 60-32179.
``Recording Disk Reproducing Apparatus'' and ``Optical Disc Reproducing Apparatus'' disclosed in Japanese Patent Application Laid-Open No. 59-231784.

[Problems to be Solved by the Invention] However, when an attempt is made to actually reproduce a video disc and a digital audio disc using the same optical disk device, the following problems occur.

(1) There are major differences in standards between video discs and digital audio discs. In particular, when comparing the diameters of the center holes of both disks and the innermost circumferential diameter of the recording track (that is, the diameter corresponding to the maximum allowable diameter of the turntable), the results are as follows.

Therefore, it was difficult and rare to use a disc mounting device consisting of the same turntable and clamper.

As a result, two types of turntables and two
There are problems in that this requires multiple motors, making the device/configuration complicated and large, and that reliability may also decrease.

(2) Therefore, by using only one motor, we devised the shape of the turntable attached to the spindle and the clamper facing it, so that when the video disc 7 is mounted, it is clamped near the outer periphery of the turntable. ,
When mounting a digital audio disc, it has been proposed to clamp the disc at the inner periphery of the turntable (such as the "Disc Mounting Device" disclosed in Japanese Patent Application Laid-Open No. 60-7642).

However, these disc loading devices do not change the size of the turntable according to the shape of the disc, and when loading a video disc, there are cases where the disc cannot be securely fixed or the turntable is small, so This has not been a practical solution to the problem, such as the fact that the disk becomes so warped that it may not be possible to reproduce the video sufficiently.

Therefore, the present invention aims to solve the above problems (1) and (2>), and aims to provide a disc mounting device that has a simple configuration and can mount two types of optical discs with different shapes. It was done.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the present invention has the following structure as a means for solving the problems. That is, the first disk corresponds to two types of disks with mutually different hole diameters. A second turntable is disposed at each end of the rotation shaft of the drive motor, and an overturning means for rotating the motor by at least 180 degrees about an axis perpendicular to the rotation shaft; a motor fixing means for fixing the motor in two rotated positions; This is a configuration of a disc mounting device configured to fix a disc between the second turntable and the clamper provided at a position facing either of the second turntables.

[Function] The disk mounting device of the present invention having the above configuration rotates the drive motor, which is provided with two types of turntables at each end of the rotating shaft, around the axis perpendicular to the rotating shaft of the motor by the inverting means. Rotate 180 degrees to
Fix the above motor in two positions rotated 80 degrees, and
Clampers provided at positions facing the turntable at two fixed positions serve to mount different types of discs, respectively.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a perspective view showing the configuration of a disk loading device as an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

As shown in the figure, the disc mounting device of this embodiment includes a falling shaft 3a rotatably supported by a frame 1.

3b (however, the overturning shaft 3b is not shown in FIG. 1) is provided with a spindle motor device 5, and one end of the overturning shafts 3a, 3b is provided with a motor drive device 7 which functions as a overturning means and a motor fixing means. It is configured. Further, the spindle motor device 5 has a video disc turntable device 11 (hereinafter referred to as VD) on which a video disc (VD) is mounted on both ends of the spindle motor device 5 across the axes of the falling shafts 3a and 3b.
A digital audio disk turntable device 12 (hereinafter referred to as a DA turntable device) to which a digital audio disk (DAD) is attached
(referred to as a turntable device for D).

Note that the information recorded on the disks fixed to these turntable devices 11 and 12 is stored on the guide shafts 15a and 15.
However, the details of such optical reading are not directly related to the present invention, so below,
Detailed explanation will be omitted.

As shown in FIG. 2, the spindle motor device 5 includes a C motor 27 with small rotational unevenness in a cylindrical housing 25, and is similar to the turntable device 11 described above.
．． 12 are provided at each end of the spindle 29 of the DC motor 27.

The housing 25 is supported by the frame 1 by overturning shafts 3a and 3b, and is prevented from overturning by a motor drive device 7, which will be described later.
When 3a is rotated 180 degrees, the spindle motor device 5
is rotated around the axes of the overturning shafts 3a and 3b. V.D.
The overturning axes 3a and 3b between the clamping surface of the turntable device 11 for DAD and the clamping surface of the turntable device 12 for DAD
Since the distances to the axial centers of the discs are the same and b, when the discs are rotated 180 degrees, the positions of the VD turntable device 11 and the DAD turntable device 12 with respect to the mounted disc are exactly swapped.

The motor drive device 7 is configured to include a DC motor 31 as a drive source and a large gear 33 rotated by a worm gear 32 . The large gear 33 is coaxially connected to a shaft holder 35 fitted and fixed to the overturning shaft 3a by ten leaf springs 37, and is rotated by the DC motor 31 through engagement with the worm gear 32. , rotates the overturning shaft 3a.

The other end 3b of the falling shaft supporting the housing 25 passes through the frame 1, and a pin 3 is attached to the end thereof in a direction perpendicular to the axial direction.
9 is being hit. This pin 39 comes into contact with two stoppers 4'la and 41b erected on the outer surface of the frame 1, and works to prevent the spindle motor device 5 from rotating more than 180 degrees. That is, the DC motor 31 rotates, and the large gear 3
3 rotates in the direction of the arrow in FIG.
When the pin 39 contacts the stopper 4 and rotates in the opposite direction so that the DAD turntable device 12 faces upward, the pin 39 contacts the stopper 4.
1b.

The contact of the pin 39 with the stopper 41a or 41b is detected by a limit switch (not shown) or by a change in the current flowing through the DC motor 31, but until the power supply to the DC motor 31 is stopped. Then, the large gear 33 rotates a little further. The leaf spring 37 bent by the rotation of the large gear 33 biases the falling shaft 3a in one direction of rotation via the shaft holder 35. Even if the power supply to the DC motor 31 is stopped in this state,
Since the large gear 33 meshes with the worm gear 32, it will not rotate in reverse. Therefore, the spindle motor device 5 is
Either the VD turntable device 11 or the DAD turntable device 12 is securely fixed in a position facing upward.

When a video disc VD is loaded with the VD turntable device 11 facing upward, the video disc VD is attached to the VD turntable device 11 and the clamp device 4.
It is fixed between 7 and 7. VD turntable device 11
is a turntable 50 fixed to the spindle 29 of the spindle motor device 5, a disk hub 54 rotatably attached to the spindle 29, and a compressor mounted between the disk hub 54 and the U turntable 50. A bearing that is fixed by the spring 56 and two spindles and four bosses 57 and rotatably supports the rotating shaft of the clamper device 47 is composed of a disk 59. When a video disc VD is placed on the VD turntable device 11,
The disc hub 54 fits into the center hole of the video disc VD, and sinks slightly against the bias of the compression spring 56 due to the weight of the video disc VD. In this state, the clamp device 47 is lowered from above, and the clamp device 47 is lowered from above.
A rotating shaft 61 fixed at the center of the clamper 60 of No. 7 is fitted into a recessed portion of a disk plate 59.

On the other hand, the peripheral end of the clamper 60 is brought into contact with the inner peripheral part of the upper surface of the video disc VD. The clamping device 47 rotatably supports a rotary shaft 61 fixed to the clamper 60 using a backing plate 64 made of resin on a movable plate 63 that is biased downward by a spring 62. 60 clamps and fixes the video disc VD with an appropriate pressing force.

On the other hand, when a digital audio disk (DAD) is mounted, the spindle motor device 5 is overturned by the motor drive device 7 from the state shown in FIG.
When the turntable device 12 is facing upward, the digital audio disc (DAD)
The center hole of the turntable device 12 fits into the disk hub 65, and its inner peripheral portion is clamped and fixed by the turntable 67 and the clamper 60.

In this embodiment configured as described above, the VD turntable device 11 is provided at one end of the two spindles of the spindle motor device 5, and the DAD turntable device 12 is provided at the other end, and the motor overturning device 7 This causes the spindle motor device 5 to fall! 1 mainly around Ih3a and 3b
It is rotated by 80 degrees and fixed at two positions before and after rotation, and is connected to the VD turntable device 11 or the DAD turntable device 12 and the clamp device 47 facing it.
Each disk can be fixed by Therefore 2
Various types of discs, here video discs and digital audio discs, can be loaded. Furthermore, since a turntable having an optimum diameter according to the disc is used, the disc can be reliably mounted and bending of a video disc with a large diameter can be reduced.

Furthermore, according to this embodiment, only one DC motor 27 and one clamp device 47 are required to rotate the disk. Normally, video discs and digital audio discs are optically read from the bottom surface, and no information is recorded on the opposite surface, so it is difficult to clamp a video disc VD to a small-diameter digital audio disc (DAD). It is acceptable to use the same clamp that was used. On the other hand, the turntable
Depending on the disc to be loaded, either a large diameter video disc (VD turntable device 11) or a small diameter digital audio disc (DAD turntable device 12) is selected. Therefore, the pickup section 20
When a digital audio disc (DAD>) is installed, compared to when a video disc (VD) is installed (this situation is shown in Fig. 3 (A)), the disc is closer to the center of the disc. The information on the innermost track can also be easily read.

FIG. 3(B) shows this situation.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment. It goes without saying that the present invention can be implemented in various ways as long as no changes are made.

Effects of the Invention As described in detail above, the disc mounting device of the present invention has a simple configuration and has the excellent effect of being able to mount two types of discs. Therefore, if the disc loading device of the present invention is used in an optical disc device, it is possible to realize an optical disc device that can play at least two types of discs with a simple configuration, and it is also possible to reduce the size of the optical disc device.

[Brief explanation of the drawing]

゛Figure 1 is a perspective view showing the configuration of a disk loading device as an embodiment of the present invention, Figure 2 is a cross-sectional view of the disk loading device in the spindle axis direction, and Figures 3 (A> and (B) are respectively It is an explanatory diagram showing a mounting state of a disk and a position of a pickup part. 1... Frame 3a, 3b... Falling shaft 5
. . . Spindle motor device 7 . . . Motor overturning device 11 . ...Big gear VD...
・Video disc

Claims (1)

[Claims] A first disc compatible with two types of discs having mutually different hole diameters;
A second turntable is disposed at each end of a rotating shaft of a drive motor, and an overturning means for rotating the motor at least 180 degrees about an axis perpendicular to the rotational shaft; and a motor fixing means for fixing the motor in two positions rotated by 180 degrees, and a clamper provided at a position facing either the first or second turntable at the fixed position of the motor. , a disk mounting device configured to fix a disk between the turntable and the turntable.