JP3582364B2 - Disc loading device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk loading device that uses a disk-shaped medium such as an optical disk and a magnetic disk.
[0002]
[Prior art]
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, a tray for transferring a disk as a medium to a turntable to support loading of both 12 cm and 8 cm disks. On the upper part, concave portions each having a substantially circular shape and a diameter of approximately 12 cm and 8 cm are formed. As a conventional example, as shown in, for example, Japanese Patent Application Laid-Open No. 63-300476, 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. .
[0003]
Here, general disc loading will be described with reference to FIGS.
[0004]
First, the case where a 12 cm disk is used will be described.
[0005]
FIG. 6 is a diagram during the loading of the disk, and the loading of the disk proceeds in the order of FIGS. 6 and 7, FIG. 8, and FIG. FIGS. 8 and 9 show the state in which the disk is carried to a predetermined position and the loading is completed.
[0006]
In the drawing, reference numeral 1b denotes a 12 cm disk, and reference numeral 22 denotes a tray for mounting the disk when loading or unloading the disk 1b, mounting the disk in a drive body (not shown), or pulling out the disk from the apparatus.
[0007]
In order to facilitate positioning of the disc at the time of disc loading and holding of the disc at the time of completion of loading, the tray 22 is not on the same plane, has a diameter of approximately 12 cm and 8 cm, and is substantially circular and has a recessed disk mounting surface. Is formed. The mounting surface 22a corresponding to a normal 8 cm disk is formed at a position one step deeper than the mounting surface 22b of a 12 cm disk.
[0008]
Reference numeral 3 denotes a turntable for placing and holding the disk when the disk 1b is moved to a predetermined position by the tray 22, and rotating the disk. 4 denotes a pickup for exchanging signals from the disk 1b; A unit mechanism on which a motor for rotating the table and the pickup 4 are mounted, and a clamper 7 for holding the disc in a state of being sandwiched between the turntable 3 when loading is completed. A magnet (not shown) is provided at the center of the turntable 3, and an iron plate 7 a, for example, which is attracted to the magnet, is incorporated in one of the clampers 6. 6 and is held.
[0009]
Reference numeral 6 denotes a unit holder on which the unit mechanism 5 is mounted and which holds the unit mechanism via an anti-vibration rubber 8. The anti-vibration rubber 8 acts to block unnecessary vibrations so as not to transmit an impact from the outside of the drive to the unit mechanism 5 or to prevent the vibration generated by the unit mechanism 5 due to the rotation of the disk 1 b from being transmitted to the housing of the drive. Is responsible for.
[0010]
Here, FIG. 6 is an explanatory view in the course of loading the disk 1b into a drive main body (not shown), and shows a case where the 12 cm disk 1b is placed on the mounting surface 22b of the disk on the tray 22. First, the disk 1b is placed on the loading surface 22b on the tray 22 for loading.
[0011]
Subsequently, the disc loading and the disc holding method 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. . When a switch (not shown) for instructing loading is turned on, the tray 22 is moved in the direction of arrow A by the motor for the loading mechanism (not shown), and the unit mechanism 5 is moved in the direction of arrow C about the rotating shaft 6a of the unit holder 6 as a center. Moving.
[0012]
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.
[0013]
Here, 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. FIG. 8 shows a case where the loading continues, and the tray 22 advances in the direction of arrow A, and 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.
[0014]
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 by the turntable 3 and the clamper 6 in the target direction with respect to the disk 1b. Thus, the loading operation of the disk is completed, the disk starts to rotate in accordance with a command from a control circuit (not shown), and a signal is read by the pickup.
[0015]
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 be described with reference to FIGS. Each symbol is the same as that of the above-described conventional example, and thus will not be described here.
[0016]
FIG. 10 shows a conventional example in which an 8 cm disk 1a is used, and FIG. 11 shows a partially enlarged view of the vicinity of the turntable 3 in FIG. 10 described above, and shows the positional relationship between the disk 1a and the turntable 3. It is clearly shown.
[0017]
First, as shown in FIG. 10, when the 8 cm disk 1a is mounted on the mounting surface 22a of the tray 22, the mounting formed at a lower position on the tray 22, that is, a position closer to the unit mechanism 5 than the 12 cm disk described above. The disk 1a is placed on the placing surface 22a. Conventionally, the central axis 11b of the mounting surface 22b of the 12 cm disk and the central axis 11a of the mounting surface 22a of the 8 cm disk are arranged at the same position. For this reason, when the loading proceeds and the turntable 3 moves up, as shown in the figure, when the turntable 3 moves in the direction of arrow C around the rotation axis 6a of the unit holder 6, the disc of 8 cm is larger than the disc of 12 cm. Is located at a lower position, a difference in timing occurs between the turntable 3 and the 8 cm disc 1 a when the 8 cm disc 1 a is placed on the turntable 3, unlike when a 12 cm disc 1 b is used. Occurs. Therefore, 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. There is a problem that mis-chucking is likely to occur.
[0018]
In addition, when the optical disk device is placed obliquely, a part of the device moves due to its own weight, and the above-described problem of disk mischucking may occur.
[0019]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable disk loading device that can stably mount and hold a disk on a turntable even when disks of different diameters are used, in order to solve the above-described problems. To provide.
[0020]
Another object of the present invention is 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]
[Means for Solving the Problems]
The present invention, in order to solve the above problems,
A turntable for rotating a disc; and a tray for transferring the disc to place the disc on the turntable. The tray has two or more kinds for transferring two or more kinds of discs having different diameters. In the disk loading device, the concave portions are located at different heights, and the positions of the substantially circular central axes formed on the tray are different.
[0022]
Further, in the disc loading device, the positions of the central axes of the two or more kinds of substantially circular concave portions are different in the direction of loading / unloading the disc.
[0023]
Is used for a disc loading device.
[0024]
Further, the tray is provided with 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. This prevents mischucking of the disk caused when a part of the apparatus moves by its own weight when the apparatus is placed at an angle.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a case where the embodiment of the present invention is applied to a CD-ROM drive device as an example will be described with reference to FIGS.
[0026]
FIG. 1 is a cross-sectional side view showing a main part of the disc 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 disk, 2 is a tray on which the disk 1a is mounted when loading / unloading the disk 1a, and 3 is a disk on which the disk 1a is mounted when the disk 1a is moved to a predetermined position by the tray 2. And a turntable for holding and rotating the disk 1a. A magnet (not shown) is fitted in the center of the turntable to be attracted to a clamper described later. 4 is a pickup for exchanging signals from the disk 1a, 5 is a unit mechanism on which a turntable rotation motor (not shown) and the pickup 4 are mounted, 6 is a unit mechanism on which the unit mechanism 5 is mounted, and via a vibration isolating rubber 8. And a unit holder for holding the unit mechanism 5.
[0027]
Reference numeral 7 denotes a clamper which holds the disk 1a by the turntable 3 when the loading is completed, and has a built-in iron plate 7a which is attracted to a magnet. Therefore, after the unit mechanism 5 is lifted, the disk 1a is sandwiched between the turntable 3 and the clamper 7 and held.
[0028]
Further, 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, and positioning and loading of the disk during disk loading. The structure makes it easy to hold the disk later.
[0029]
Further, the mounting surface 2a of the disk for 8 cm is generally located one step lower than the mounting surface 2b of the 12 cm disk.
[0030]
FIG. 3 is a view of FIG. 1 viewed from the direction of arrow Z, and shows only the tray 2. For the purpose of explanation, the displacement of the central axes 11b and 11a of the generally circular mounting surfaces 2b and 2a for the 12 cm disk and the 8 cm disk according to the present invention is shown in an enlarged state in the X-axis direction.
[0031]
The feature of the present invention is that when loading a 12 cm disk, the position of the mounting surface 2b is determined so that the timing of raising the unit mechanism 5 and the unit holder 6 matches the 12 cm disk, and also when loading an 8 cm disk. That is, a disc mounting surface of 8 cm is arranged so that similar timing can be realized. That is, by setting the center axis of these mounting surfaces, that is, the center axis 11b of the mounting surface 2b corresponding to the 12 cm disk, to a position different from the center axis 11a of the mounting surface 2a of the disk corresponding to the 8 cm disk 1a. The chucking operation can be performed easily and stably even when using an 8 cm disk as well as a 12 cm disk.
[0032]
The details will be described below with reference to the drawings.
[0033]
First, in FIG. 1, a disk 1a is placed on a loading surface 2a on a tray 2 for loading.
[0034]
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 turned 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.
[0035]
At this time, according to the present invention, as shown in the enlarged view of FIG. 2, the center axis 11b of the mounting surface 2b for the 12 cm disk and the center axis 11a of the mounting surface 2a for the 8 cm disk are shifted from each other. Because of the positional relationship, the inner diameter portion of the disc 1a of 8 cm does not ride on the slope 3a of the turntable 3 and does not cause mischucking.
[0036]
That is, by displacing the central axis 11b of the mounting surface 2b for the 12 cm disk and the central axis 11a of the mounting surface 2a for the 8 cm disk, the timing at which the 8 cm disk is mounted on the turntable 3; The timing at which the 12 cm disk is placed on the turntable 3 can be relatively the same. Therefore, even in the case of an 8 cm disk, it is possible to load the disk while ensuring high reliability stably without causing mischucking.
[0037]
Next, a second embodiment will be described with reference to FIG. 1, FIG. 4, and FIG.
[0038]
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.
[0039]
Here, FIG. 4 is an explanatory diagram when the CD-ROM drive 10 is placed obliquely, and FIG. 5 is a diagram showing the second embodiment.
[0040]
As described above, the unit mechanism 5 is usually mounted via the unit holder 6 in order to block external disturbances, that is, vibrations. Therefore, the vibration isolating rubber for blocking vibration between the unit holder 6 and the unit mechanism 5 is often used. Generally, 8 is attached.
[0041]
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.
[0042]
Since the anti-vibration rubber may use a relatively soft material, 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.
[0043]
Therefore, as shown in FIG. 5, in contrast to the arrangement of the mounting surface for an 8 cm disk having the central axis 11a as formed in the first embodiment, the center of the mounting surface of the conventional 8 cm disk is changed. Both a circle formed by the axis 11b (the same axis as the center axis of the mounting surface 32b of the 12 cm disc) and a center axis different from the center axis 11b and having a height and a diameter adjusted to an 8 cm disc. By setting a substantially elliptical mounting surface 32a formed by connecting two common tangents and a part of the two circular circumferences, a disk when the CD-ROM drive is placed on an inclined surface Can be solved.
[0044]
That is, even if the CD-ROM drive is placed on a slope and the unit mechanism 5 moves diagonally forward by its own weight, the shape of the mounting surface 32a is substantially elliptical, and the disk can also move along the shape. Therefore, when the turntable picks up an 8 cm disk, mis-chucking can be prevented.
[0045]
As described above, by using these embodiments, it is possible to stably chuck a disk even when an 8 cm disk is used, as well as a 12 cm disk. The disk loading mechanism can be easily realized without increasing the cost.
[0046]
In the present embodiment, the case where the present invention is applied to a CD-ROM drive has been described as an example. However, the drive to which the present invention is applied is not limited to this, and a light source and / or It can be applied to a wide range such as a drive using a magneto-optical disk and / or a player.
[0047]
【The invention's effect】
In a disc loading apparatus that loads discs having different diameters on the same tray, it is possible to prevent mis-chucking of discs, which tends to occur during loading.
[0048]
In addition, by providing the tray with a roughly oval concave portion formed by connecting two tangent lines common to two circles having different center axes and a part of the circumference of the two circles, the apparatus can be used. When placed obliquely, of course, even when the apparatus is placed horizontally, since the recess is roughly oval, the degree of freedom of movement of the disc placed in the recess of the tray increases, The effect of preventing mis-chucking of the disc 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 disk 1b: 12 cm disk 2, 22, 32 ... Tray 2a, 22a, 32a: Mounting surface 2b, 22b, 32b for 8 cm disk Mounting surface 3 for 12 cm disk 3 ... Turntable 4 ... Pickup 5 ... Unit mechanism 6 ... Unit holder 7 ... Clamper 8 ... Vibration isolation rubber 11a ... Center axis of the mounting surface for 8cm disk 11b ... Center axis of the mounting surface for 12cm disk

Claims (1)

A turntable for rotating the disc,
A tray for transferring the disk onto the turntable,
The tray is provided with a plurality of recesses for transferring a plurality of discs of different diameters,
In the disc loading device, where each recess is located at a different height,
At least one of the recesses has two tangents common to two circles centered on axes separated by a predetermined distance in the direction of loading / unloading the disc and one of the circumferences of the two circles. An elliptical concave portion formed by connecting portions of the disk loading device.

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