JPS58212683A - Method and apparatus for loading disc - Google Patents

Abstract

PURPOSE:To improve the efficiency of operation and pressing down a disc with a fixed force also during a high speed revolution in noncontact state, by pressing down the disc to a rotary plate by using repulsion generated between the magnetic poles of a magnetic substance. CONSTITUTION:A disc press 7 fitted with a spindle 3 is put on the center part of the disc 2 and a magnet 8 is attached to the upper part of the disc press 7. A magnet 13 is fitted to a cover 10' arranged on the upper part of the disc 2 so that the same poles of the magnets 8, 13 are opposed. At the recording and reproducing of information, the upper cover 10' is closed and the disc 2 is pressed against to a turn table 1 by the repulsion generated between the magnets 8, 13 and smoothly rotated. At the charge/discharge of the disc 2, the upper cover 10' is opened and the disc 2 and the disc press 7 are removed from the spindle 3, so that the disc can be charged/discharged simply.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk mounting method, and more specifically to a disk mounting method suitable for use in an optical information recording/reproducing device that rotates a disc-shaped recording medium to record or reproduce information. Regarding methods and devices, optical information recording and reproducing devices such as optical disks are attracting attention. This type of device rotates a disk-shaped recording medium (hereinafter referred to as a disk),
Information is recorded by irradiating the disc with a light beam modulated according to the information, or by irradiating the original beam onto the disc surface on which information is recorded and detecting changes in the reflected light with a light receiving element, etc. It plays back 1.7 seconds and takes 7 sessions.

2 High-density information can be recorded on a small disk.

It has the following features. However, in order to perform high-speed and high-density recording and reproduction as described above, the rotational speed of the disk must be between 500 and 1800 r, p, m.
The disk loading N method, which is suitable for such high-speed rotation, has become a problem.

Conventionally, the following method has been used as a method for mounting a disk in the above-mentioned apparatus.

That is, the disk is inserted into the device through the space created by opening the top cover of the device and placed on a rotary plate connected to a disk drive source. At this time, the shaft of the rotary plate and the hole provided in the center of the disk are fitted to position the shidinuk, and at the same time, the frictional force with the rotary plate gives rotational force to the shidinuk. This is similar to the method of mounting a record on a player. The operation becomes possible by closing the upper cover after installing the disk.

However, in the conventional mounting method described above, if the normal force between the disk and the rotating plate is small, the disk may be lifted off the rotating plate due to high-speed rotation, or the disk may be damaged due to angular acceleration when starting or stopping rotation. The added force is
Due to the aforementioned frictional force, the disc slipped on the rotating plate, causing uneven rotation of the disc.

In addition, as another disk mounting method that eliminates the above-mentioned drawbacks, there is a method shown in FIG. 1. In FIG. A disc holder 4 is screwed into a threaded portion provided at the center of the rcjJ spindle in order to hold the disc 2 between it and the R11 roller plate 1. In this method, the disc holder 4 is 4 to rotate disk 2 to rotating plate 1
Since the disc 2 is pressed against the rotating plate 1, there is no possibility that the disc 2 will float or slip on the rotating plate 1.

However, in optical information recording and reproducing devices, etc., discs are frequently inserted and removed, so using the method shown in Figure 1, it is necessary to screw the disc holder into the spindle each time, resulting in poor operability. There were 5 lucky flaws. Furthermore, if the twisting force is small, there is a possibility that the disc holder may loosen during rotation, which poses a problem in the reliability of mounting.

SUMMARY OF THE INVENTION In view of the above drawbacks, it is an object of the present invention to provide a reliable and simple disk mounting method and device with good operability.

The present invention achieves the above object by pressing the disk against the AiJ rotating plate using the repulsive force generated between the same magnetic poles of a magnetic material in a method of mounting a disk on a rotationally driven rotary plate. be.

The present invention also provides a rotary plate that is driven to rotate, a member that clamps the disk between the rotary plate, a first magnet attached to the member, and a magnet having the same polarity as the first magnet. The present invention provides a disk mounting device comprising a second magnet installed in the disk, and pressing the disk against the rotating plate via the member by a repulsive force generated between the first magnet and the second magnet. be.

Hereinafter, the present invention will be specifically described based on examples and with reference to the drawings.

FIG. 2(5) is a partial sectional view showing a first embodiment of the disc loading device according to the present invention. In Figure 2, the spindle /I/3 rotates together with the rotating shaft of the motor 6.
A disk 2 positioned at 1 is placed on the rotary plate 1. A disk holder 7 fitted with a spindle is placed in the center of the disk 2, and a magnet 8 is attached to the upper part of the disk holder 7. Further, a magnet 13 is installed in a portion 4110 above the disk so that the same polarity as the magnet 8 faces.

When the rotating plate 1 is rotated by the motor 6, the disk 2 is pressed against the rotating plate 1 with a constant force via the disk presser 7 due to the repulsive force acting between the magnet 8 and the magnet 1. Therefore, the disk 2 does not float or slip on the rotary plate 1 during rotation (smooth disk rotation can be obtained.Also, since the magnets are not in contact with each other, even when rotating at high speed, There are no problems caused by friction, etc. Also, there is no need to perform operations such as screwing in the disk holder, making it easy to handle.

FIG. 2 (Jun) shows an example in which the first embodiment shown in FIG. 2 (5) K is applied to an optical information recording/reproducing device. A disk 2 is placed on a table 1, positioned by a spindle 6'.A disk holder 7 fitted with the spindle is placed on top of the disk 2, and a magnet 8 is attached to the upper part of the disk 2. .

On the other hand, an upper cover 10' is attached via a hinge 9 provided on a side plate of the main body so as to be freely rotatable between open and closed positions. Additionally, this hinge is assisted by a spring to maintain the open stem. On the inside of the front part of the cover 10', there is a spring member 12 with a tip protrusion with a button 11 sandwiched between it and the cover 10'. It catches in the provided recess and fixes the top cover to the main body. To release, press button 11 and press member 1.
This is done by removing 2 from the recess.

Further, a magnet 13 is attached to the inner wall of the upper cover 10', and when the cover is closed, the magnet 13 faces the magnet 8 of the disk holder so that the same poles face each other.

In this example, when recording or reproducing information, the upper cover 10' is closed and the magnet 8 is closed as explained in FIG.
The disc 2 is pressed against the turntable 1 by the repulsive force acting between the disc 2 and the magnet 13, and rotates smoothly. In this state, the card 16 is moved along the guide 17 attached to the main body to perform recording or reproduction. Further, when attaching or detaching a disk, the upper cover 10' is opened, and the disk 2 and disk holder 7 are inserted into or removed from the spindle 6', thereby making it possible to easily attach or detach the disk.

6 and 4 respectively show other embodiments based on the present invention, parts common to those in FIG. 2 are given the same reference numerals, and detailed explanations are omitted.

In the embodiment shown in FIG. 6, a rubber 14 is attached to the disc contacting surface of the disc holder 7, and the magnet 8 and the magnet 13
The rubber 14 contracts due to the repulsive force between the disks and applies force to the disk, thereby clamping the disk 2 between it and the rotary plate 1 of the Yonago TF.

In this embodiment, the disk presser 7! /C By shrinking the rubber 14 in response to the applied force, a minute gap is created between the two magnets, and a non-contact state can be maintained at all times. Also, the rubber 14Fi is effective in that it does not damage the disk surface.

FIG. 4 shows an example in which a magnet 16 is attached to a member 1o via a leaf spring 1'5. In this embodiment, if a gap is created between the two magnets due to the deflection K of the spring 15, it is possible to maintain the non-contact state between the magnets as in the example shown in FIG. This can also be done by changing the strength of the spring 15 and adjusting the force applied to the disk.

In the above-mentioned embodiment, an example is shown in which a disk holder is used, but the present invention is not limited to this, and can be applied in various ways, such as incorporating a magnet into the disk itself. Any device that presses the disk against the rotating plate by a repulsive force acting between the same magnetic poles is included in the present invention.

Furthermore, when the present invention is used in an optical information recording/reproducing device as shown in Fig. 2 (13), when a magnetic material is used as a recording medium such as a magneto-optical disk, recording is performed in the magnetic field of a magnet. Information may be affected.

However, in this case, for example, in the example shown in FIG. 2 (5), if the disc holder 7 is made of a non-magnetic material such as plastic and its diameter is made larger than that of the magnet, the influence of the magnetic field can be suppressed.
The present invention can also be used for magneto-optical de-inuku, etc.

In the above description, the present invention was mainly applied to an optical information recording/reproducing device, but the present invention is not limited to this, and can be applied to other devices in which a disk is mounted on a rotating plate and rotated at high speed. It can also be used and is very effective.

As explained above, the present invention has the following advantages over the conventional disc mounting method and device: 1. Easy mounting and good operability.

2. Reliably presses the disc with constant force even during high-speed rotation.

3. Since the disc is pressed without contact, there are no problems due to friction, etc.

It has the following effects.

[Brief explanation of the drawing]

Figure 1 is a partial cross-sectional view illustrating the conventional disk mounting method.
FIG. 2 (7! is based on the present invention)
FIG. 2 is a partial sectional view illustrating an embodiment of the present invention; FIG. It is a partial sectional view showing another embodiment. 1... Rotating plate, 2... Disc, 6'...
・For spindle 6...Motor, 7.@.0 disk H1 engineering z8.16.φ-.Magnet, 10...Upper phase.

Claims (1)

[Scope of Claims] A method for mounting a disk, characterized in that the disk is pressed against the rotating plate using repulsive force generated by the disk. It consists of a first magnet that is angled and a second magnet that is installed so that the same magnetic poles of the first magnet and the second magnet face each other, and the repulsive force generated between the first magnet and the second magnet . A disk mounting device that presses the disk against the rotating plate via the member.