JP2000021056A - Disk loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent mischucking by making positions of center axes of circular recessed parts which are formed on a common tray while their heights are made different in order to respectively transfer disks whose diameters are different differ mutually. SOLUTION: A tray 2 are provided with disk mounting surfaces 2a, 2b respectively corresponding to 8-cm and 12-cm disks and the mounting surface 2a for 8-cm disk is formed lower by one step than the mounting surface 2b. In a loading operation, when the tray 2 is moved to the direction of the arrow A, a unit mechanism 5 and a unit holder 6 are moved to the direction of the arrow C in synchronization with this movement. A turntable 3 holds a disk 1a between a clamper 7 and the turntable by engaging with the center hole of the disk 1a in accordance with the ascending of the unit mechanism 5. Respective center axes 11a, 11b of the mounting surfaces 1a, 2b are formed by being shifted mutually and, thus, timings when the turntable 3 mounts 8-cm and 12-cm disks are made to be synchronized with the movement of the tray 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk loading apparatus using a disk-shaped medium such as an optical disk, a magnetic disk and the like.

[0002]

2. Description of the Related Art In recent years, the recording and / or reproducing apparatus using an optical disk has been rapidly expanding its market with the spread of personal computers. In such a situation,
For example, in the case of an optical disk device such as a CD-ROM drive or a DVD drive, for example, in order to support loading of both 12 cm and 8 cm diameter disks, a substantially circular disk is placed on a tray for transferring a disk as a medium to a turntable. A concave portion having a diameter of about 12 cm and 8 cm is formed. As a conventional example, for example,
As shown by 300476, the plurality of concave portions are formed such that the substantially circular central axes are located at the same position with each other for convenience of design.

Here, a general disc loading will be described with reference to FIGS.

First, the case where a 12 cm disk is used will be described.

FIG. 6 is a diagram showing the loading of the disk, and the loading of the disk proceeds in the order of FIGS. 6 and 7, and FIGS. FIGS. 8 and 9 show the state in which the disk is carried to a predetermined position and the loading is completed.

In FIG. 1, reference numeral 1b denotes a 12 cm disk, and reference numeral 22 denotes a tray for loading the disk 1b when loading or unloading the disk 1b and mounting the disk on a drive body (not shown) or pulling out the disk from the apparatus.

In order to facilitate the positioning of the disk at the time of disk loading and the holding of the disk at the time of completion of loading, the tray 22 has a diameter of approximately 12 cm and 8 cm which is not on the same plane. A mounting surface is formed. The mounting surface 22a corresponding to the 8-cm disk is formed at a position one step deeper than the mounting surface 22b of the 12-cm disk.

[0008] Further, when the disc 1b is moved to a predetermined position by the tray 22, the disc 3 is placed and held,
Turntable for rotating the disc, 4 for the disc 1
a pickup for exchanging signals from b, a unit mechanism equipped with a turntable rotation motor and pickup 4 (not shown), and a clamper 7 for holding a disc in a state of being sandwiched between the turntable 3 when loading is completed. is there. A magnet (not shown) is provided at the center of the turntable 3, and, for example, an iron plate 7a, which is attracted to the magnet, is incorporated in one of the clampers 6. After the unit mechanism 5 is completely lifted, the disk 1b is connected to the turntable 3 and the clamper. 6 and is held.

6 is provided with the unit mechanism 5,
Further, it is a unit holder which holds the unit mechanism via the vibration isolating rubber 8. The anti-vibration rubber 8 functions to block unnecessary vibrations so as not to transmit an impact from the outside of the drive to the unit mechanism 5 or to transmit the vibration generated by the unit mechanism 5 due to the rotation of the disk 1 b to the housing of the drive. Is responsible for.

FIG. 6 is an explanatory view of the loading of the disk 1b into a drive body (not shown).
This shows a case where a 12 cm disk 1b is placed on the disk mounting surface 22b on the tray 22. First,
The disk 1b is placed on a loading surface 22b on the tray 22 for loading.

Next, a method of loading a disk and holding the disk will be described. Normally, in the disc loading mechanism, during loading or unloading of the disc, the unit mechanism 5 is in a state where the turntable portion side is lowered about the rotation shaft 6a of the unit holder 6 as shown in FIG. . Here, when a switch (not shown) for instructing loading is turned ON, the tray 22 is driven by a motor for a loading mechanism (not shown).
Moves in the direction of arrow A, and the unit mechanism 5 moves in the direction of arrow C about the rotation shaft 6a of the unit holder 6.

As described above, the loading of the disk is performed by the operation in the direction A of the tray 22 by the mechanism (not shown) and the operation in the direction of the arrow C around the rotation axis 6a of the unit holder 6 in synchronization with the operation.

FIG. 7 is a partially enlarged view of the vicinity of the turntable 3 in FIG. 6 described above in order to clearly show the positional relationship between the disk 1b and the turntable 3. In this state, the unit mechanism 5 is separated from the disk 1b. Loading will continue,
FIG. 8 shows a case in which the tray 22 advances in the direction of arrow A, and similarly, the unit holder 6 and the unit mechanism 5 further advance in the direction of arrow C. FIG. 9 is an enlarged view of the vicinity of the turntable 3 in FIG.

At this time, the disk 1b is separated from the disk mounting surface 22b of the tray 22 by the elevation of the unit mechanism 5, and is sandwiched between the disk 1b by the turntable 3 and the clamper 6 in a target direction. With this, the loading operation of the disk is completed, and the disk starts rotating by a command from a control circuit (not shown).
The signal can be read by the pickup.

The case where a disc having a diameter of 12 cm is used in the conventional example has been described above. A case where an 8 cm disc is loaded by the present apparatus will now be described with reference to FIGS. Each symbol is the same as that of the above-described conventional example, and therefore, is omitted here.

FIG. 10 shows a conventional example in which an 8 cm disk 1a is used. FIG. 11 is a partially enlarged view of the vicinity of the turntable 3 in FIG. The positional relationship is clearly shown.

First, as shown in FIG. 10, when an 8 cm disk 1a is mounted on the mounting surface 22a of the tray 22, the disk 1a is formed at a lower position on the tray 22, that is, closer to the unit mechanism 5 than the 12cm disk. The disk 1a is placed on the placed mounting surface 22a. Conventionally, this 12
center axis 11b of the mounting surface 22b of the 8 cm disc and 8 cm
And the central position 11a of the disc mounting surface 22a. As a result, the loading proceeds and the turntable 3 rises, and as shown in FIG.
, The 8 cm disc is lower than the 12 cm disc, so there is 1 disc between the turntable 3 and the 8 cm disc 1a.
Unlike the case of using a 2 cm disc 1b, 8 cm
When the disc 1a is placed on the turntable 3, a timing shift occurs. For this reason, as shown in FIG. 12, the inner diameter portion of the disk 1a rides on the inclined surface 3a of the center portion of the turntable, and the disk 1a comes off from the tray mounting surface 22a, causing a positional shift, and There is a problem that mischucking is likely to occur.

Further, when the optical disk device is placed obliquely, a part of the optical disk device may move due to its own weight, which may cause the above-described problem of disk mischucking.

[0019]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by stably mounting a disk on a turntable even if disks of different diameters are used.
An object of the present invention is to provide a highly reliable disk loading device that can be held.

It is another object of the present invention to provide a disk loading device that can stably mount and hold a disk on a turntable even when the device is placed at an angle.

[0021]

In order to solve the above-mentioned problems, the present invention provides a turntable for rotating a disk, and a tray for transferring the disk to place the disk on the turntable. The tray is provided with two or more types of substantially circular recesses for transferring two or more types of discs of different diameters, and the recesses are formed on the tray in a disc loading device at different heights. Characterized in that the positions of the substantially circular center axes are different.

Further, in the disc loading apparatus, the position of the center axis of the two or more kinds of substantially circular concave portions is different in the direction of loading / unloading the disc.

Means is used for a disc loading device.

Also, a substantially elliptical concave portion for mounting a disc formed by connecting two tangent lines common to two circles having different center axes and a part of the circumference of the two circles is formed. By providing the tray, the mis-chucking of the disk caused by a part of the apparatus moving by its own weight when the apparatus is placed obliquely is prevented.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where an embodiment of the present invention is applied to a CD-ROM drive as an example will be described below with reference to FIGS.

FIG. 1 is a sectional side view showing a main part of the disk loading device, and FIG. 2 is an explanatory view in which the vicinity of the turntable 3 is partially enlarged for explanation in FIG. Here, 1a is an 8 cm disc, 2 is a disc 1
a tray on which the disk 1a is mounted when loading / unloading a, a turntable 3 for mounting and holding the disk 1a and rotating the disk 1a when the disk 1a is moved to a predetermined position by the tray 2;
In addition, a magnet (not shown) is fitted in a central portion to be attracted to a clamper described later. 4 is a pickup for exchanging signals from the disk 1a, and 5 is a turntable rotation motor and pickup 4 (not shown).
Is a unit mechanism on which the unit mechanism 5 is mounted, and which holds the unit mechanism 5 via the vibration isolating rubber 8.

Numeral 7 is a clamper for holding the disk 1a by the turntable 3 when the loading is completed,
For example, an iron plate 7a that is attracted to a magnet is built therein. Therefore, after the unit mechanism 5 is lifted, the disk 1a is sandwiched between the turntable 3 and the clamper 7,
The mechanism is held.

On the tray 2, there are provided a disk mounting surface 2a corresponding to the 8 cm disk 1a and a disk mounting surface 2b corresponding to the 12 cm disk. The structure is easy to hold the disk after positioning and loading.

Further, a mounting surface 2a for a disk for 8 cm is usually used.
Has a structure located one step lower than the mounting surface 2b of the 12 cm disk.

FIG. 3 is a view of FIG. 1 as viewed from the direction of arrow Z, and shows only the tray 2 portion. For explanation,
The central axes 11b, 11 of the generally circular mounting surfaces 2b, 2a for the 12 cm disc and the 8 cm disc according to the invention.
3 shows a state in which the deviation of “a” is enlarged in the X-axis direction.

A feature of the present invention is that when loading a 12 cm disc, the position of the mounting surface 2 b is determined so that the timing of raising the unit mechanism 5 and the unit holder 6 is adjusted to fit the 12 cm disc. An 8 cm disk mounting surface is provided so that the same timing can be realized during loading. That is, by setting the central axis of these mounting surfaces, that is, the central axis 11b of the mounting surface 2b corresponding to the 12 cm disk to a position different from the central axis 11a of the mounting surface 2a of the disk corresponding to the 8 cm disk 1a. The chucking operation can be easily and stably realized even when using an 8 cm disk as well as a 12 cm disk.

The details will be described below with reference to the drawings.

First, in FIG. 1, a disk 1a is placed on a loading surface 2a on a tray 2 for loading.

Here, a method of loading a disk and holding the disk will be described. Normally, in the disc loading mechanism, during loading and unloading of the disc, as shown in FIG. 1, the unit mechanism 5 and the unit holder 6 are lowered on the turntable side around the rotation shaft 6a of the unit holder. Has a structure. Here, when a loading switch (not shown) for instructing loading is turned on, the tray is moved in the direction of arrow A by the motor for the loading mechanism (not shown), and the unit mechanism 5 and the unit holder 6 move the rotating shaft 6a of the unit holder. Move to the center in the direction of arrow C.

At this time, according to the present invention, as shown in the enlarged view of FIG.
Center axis 11a of mounting surface 2a for 1b and 8cm disks
Are shifted from each other, so that the 8 cm inner diameter portion of the disk 1a does not ride on the inclined surface 3a of the turntable 3 and mis-chucking does not occur.

That is, the mounting surface 2b for a 12 cm disk
The center axis 11b of the 8 cm disc is shifted from the center axis 11a of the 8 cm disc mounting surface 2a, so that the 8 cm disc is placed on the turntable 3 and the 12 cm disc is placed on the turntable 3. And the same timing can be relatively the same. Therefore, even with an 8 cm disc, loading of the disc can be performed while ensuring high reliability stably without causing mischucking.

Next, a second embodiment will be described with reference to FIG. 1, FIG. 4, and FIG.

In FIG. 4, a two-dot chain line 10 indicates a CD-ROM drive to which the present invention is applied, and 32 indicates a tray for transferring a disk according to the present invention. Other symbols indicate the same elements as those described so far, and are omitted here.

FIG. 4 shows the CD-ROM drive 10
FIG. 5 is a diagram showing the second embodiment in the case where is placed obliquely.

As described above, the unit mechanism 5 is usually mounted via the unit holder 6 in order to cut off external disturbance, that is, vibration, and is often used to cut off vibration between the unit holder 6 and the unit mechanism 5. It is general that a vibration isolating rubber 8 is attached.

The CD-ROM drive is not only placed horizontally, but the entire drive 10 may be placed on a slope having a certain angle θ with respect to the horizontal plane H as shown in FIG.

Since the anti-vibration rubber may use a relatively soft material in some cases, when the posture changes as shown in FIG. 4, the unit mechanism 5 may also move in the diagonally forward G direction by its own weight. In this case, in the first embodiment, when the turntable picks up an 8 cm disc, there is a possibility that mischucking will occur.

Therefore, as shown in FIG. 5, in contrast to the arrangement of the mounting surface for the 8 cm disk having the central axis 11a as formed in the first embodiment, the mounting of the conventional 8 cm disk is performed. Center axis 11b (the mounting surface 3 of the 12 cm disc)
2b) and the central axis 11b
A substantially elliptical shape formed by connecting two tangents common to both a circular shape having a height and a diameter of 8 cm to a disc and a part of the circumference of the two circular shapes. By setting the mounting surface 32a, it is possible to solve mis-chucking of the disk when the CD-ROM drive is placed on an inclined surface.

That is, even if the CD-ROM drive is placed on a slope and the unit mechanism 5 moves diagonally forward due to its own weight, the shape of the mounting surface 32a is substantially elliptical, and the disk follows the shape. Since it is movable, it is possible to prevent mis-chucking when the turntable picks up an 8 cm disk.

As described above, by using these embodiments, not only chucking of a 12 cm disc, but also
Even when an 8 cm disk is used, chucking of the disk can be performed stably, and a highly reliable disk loading mechanism can be easily realized without increasing the cost.

In this embodiment, as an example, the CD-R
The case where the present invention is applied to the OM drive has been described, but the drive to which the present invention is applied is not limited to this, and drives using optical and / or magneto-optical disks, such as CD-R drives and DVD-ROM / RAM drives, and / or players It can be applied over a wide range.

[0047]

According to a disk loading apparatus for loading disks having different diameters on the same tray,
It is possible to prevent mis-chucking of the disk, which tends to occur at the time of loading.

Further, the tray is provided with a substantially elliptical recess formed by connecting two tangents common to two circles having different center axes and a part of the circumference of the two circles. When the device is placed obliquely, even when the device is placed horizontally, the degree of freedom of movement of the disc placed in the recess of the tray is large because the recess is roughly oblong. And the effect of preventing disk mis-chucking is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 6 is an explanatory diagram of a conventional example.

FIG. 7 is an explanatory diagram of a conventional example.

FIG. 8 is an explanatory diagram of a conventional example.

FIG. 9 is an explanatory diagram of a conventional example.

FIG. 10 is an explanatory diagram of a conventional example.

FIG. 11 is an explanatory diagram of a conventional example.

FIG. 12 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1a ... 8 cm disc 1b ... 12 cm disc 2, 22, 32 ... Tray 2a, 22a, 32a ... Placement surface for 8 cm disc 2b, 22b, 32b ... Placement surface for 12 cm disc 3 ... Turntable 4 ... Pickup 5 ... Unit mechanism 6 ... Unit holder 7 ... Clamper 8 ... Vibration isolation rubber 11a ... Center axis of mounting surface for 8cm disk 11b ... Center axis of mounting surface for 12cm disk

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinsuke Takatsuka 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the AV Division of Hitachi, Ltd. (72) Inventor Seiji Hamaya 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa 5D046 AA12 EA04 FA04 FA13

Claims (3)

[Claims] A turntable for rotating a disk;
A tray for transferring the disc onto the turntable, wherein the tray is provided with a plurality of generally circular recesses for transferring a plurality of discs of different diameters, each of the recesses being located at a different height. A disc loading device, wherein a position of a substantially circular center axis provided on the tray is changed. 2. The disc loading device according to claim 1,
2. The disk loading device according to claim 1, wherein the positions of the central axes of the plurality of types of the substantially circular concave portions are different in the direction of loading / unloading the disk. 3. A turntable for rotating a disk,
A disc loading device comprising a tray for transferring the disc onto the turntable, wherein a disc formed by connecting two tangents common to two circles and a part of the circumference of the two circles. A disc-loading device, wherein the tray is provided with a substantially elliptical concave portion on which the tray is placed.