JPH06203445A - Disk fixing device - Google Patents

Abstract

PURPOSE:To attain the sure and stable fixing of a disk over a long period by adding further the pressing without the inclination of the disk at the time of loading. CONSTITUTION:An optical disk 12 is loaded from the outside and placed on the end surface of the recessed part 14a of a rotary table 14. After that, a clamper 10 is moved downward by a pressing mechanism almost as much as the end surface is brought into contact with an outer peripheral member of the optical disk 12, then stopped. Also, after the clamper 10 is stopped, the pressing is continued by a movable pressing top 18 in such a manner that a chevron part 18a of the movable pressing top 18 abuts on the peripheral member of a mounting hole at the center part of the optical disk 12 by the pressing force of a coil spring 16, then the optical disk 12 is positioned at the center axis position of the rotary table 14. Since the disk 12 is never arranged in the inclined state on the rotary table 14 at this time, the inclination of the disk 12 is not generated when the disk 12 is pressed and fixed subsequently by the movable pressing top 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc fixing device for use in an optical disc device or the like for fixing an optical disc without tilting when mounted.

[0002]

2. Description of the Related Art Conventionally, in this type of disk fixing device,
When repeatedly mounting and fixing an optical disk that stores information such as documents and drawings (hereinafter simply referred to as fixing), align the center of the hole in the center with the center axis of the turntable. Need to be fixed.

FIG. 4 is a cross-sectional view showing the structure of a conventional disk fixing device, which is a cross-sectional view showing a fixed state of an optical disk (optical disk cartridge) from which recording data is read. In FIG. 4, this example is provided with an optical disk 2 for reading recorded data, and a rotary table 4 on which the optical disk 2 is placed and which is rotated by a step motor or the like not shown. The rotary table 4 has a concave portion 4a and central shafts 4b and 4c protruding in the vertical direction in the figure.

Further, in this example, the coil spring 6 disposed around the central shaft 4b in the concave portion 4a of the rotary table 4 is in contact with the upper end of the coil spring 6 and is movable through the central shaft 4b. It has a pressing piece 8.

The movable pressing piece 8 is provided with a mountain-shaped portion 8a, a through hole 8b having a diameter for inserting the central axis 4b in the central portion of the mountain-shaped portion 8a, and a mountain-shaped portion 8a having a diameter at the lower portion. It has a larger collar 8c. This Tsuba 8
The diameter of c is such a size that it can be fitted inside the concave portion 4a of the rotary table 4, so that the movable pressing piece 8 can move up and down within the concave portion 4a of the rotary table 4. Further, in this example, a clamper 10 that moves downward in the drawing and presses the optical disc 2 is provided.

Next, the operation and function of this conventional configuration will be described.

In FIG. 4, after the optical disk 2 is mounted from the outside of the apparatus and placed on the movable pressing piece 8, the clamper 10 moves downward in the drawing by the pressing mechanism (not shown) to press the optical disk 2. . By this pressing, the mountain-shaped portion 8a of the movable pressing piece 8 is fitted into the mounting hole at the center of the optical disc 2. That is, the optical disc 2 is positioned at the central axis position of the rotary table 4 by the downward movement of the clamper 10 in the figure.

[0008]

By the way, in the above-described conventional disk fixing device, the optical disk 2 may tilt when mounted. FIG. 5 is a sectional view showing a state where the optical disc 2 is tilted. As shown in FIG. 5, when the optical disc 2 is inserted from the outside and mounted,
First, the movable pressing piece 8 is held only by the mountain-shaped portion 8a. In this case, if the center of the optical disc 2 deviates from the center of rotation, the optical disc 2 tilts and is held by the movable pressing piece 8. If the clamper 10 is pressed in this tilted state, the outer member of the optical disk 2 may come into contact with the surrounding reading mechanism or the like, and normal reading may not be possible.

As an example of improving such a defect, Japanese Unexamined Patent Publication No. 62-62
The "disk turntable device" disclosed in Japanese Patent Publication No. 89262 can be mentioned. In this "disc turntable device", the disc outer peripheral surface to be mounted when the clamper presses the disc, the flat portion of the turntable and the soft material are in contact with each other,
The compression (elastic deformation) of the soft member allows the disk to be fixed without tilting.

However, this proposal requires the placement of soft material. Further, it is conceivable that the soft material may be deformed for a long period of time, so that the disc cannot be securely mounted and fixed for a long period of time.

The present invention solves the problems in the prior art as described above. A first object of the present invention is to provide a disk fixing device capable of stable and reliable fixing for a long period of time without the disk tilting during mounting. To do.

A second object of the present invention is to provide a disk fixing device capable of surely and stably fixing the disk for a longer period of time by pressing the disk during the fixing without tilting the disk during the fixing.

[0013]

In order to achieve the above object, a disk fixing device according to claim 1 corresponding to the first object is a disk rotating / holding means provided on one surface side of a disk. A conical member which is provided on the other surface side of the disc and is inserted into the central hole of the disc when the disc is mounted and fixed, and the conical member is arranged and reciprocates in the direction of the rotation axis and the other side of the disc. Disk supporting means for supporting the surface of the disk.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the disk fixing device according to the second aspect or the third aspect is arranged such that the disk rotating / holding means projects to the central portion on the side where the disk is arranged. An insertion shaft is provided, and an insertion hole into which the insertion shaft is fitted and inserted is provided in the conical member, and a pressing force is generated between the disc support means and the conical member when the disc is fixed. An elastic member or a magnet is provided.

[0015]

According to the invention of claim 1 having such a structure, the clamper moves and the conical member is inserted into the central hole of the disk after one surface of the disk contacts the rotating surface of the disk rotating / holding means. The disk is positioned. In this case, since the disc is not tilted by the disc rotating / holding means, no tilt of the disc occurs when the disc is pressed and fixed by the conical member thereafter. Therefore, stable and reliable fixing is performed over a long period of time.

According to the invention of claim 2 or 3,
When the disc is mounted, the insertion shaft of the disc rotating / holding means and the insertion hole of the conical member are fitted together, and when the disc is fixed, the elastic member or the magnet presses the disc. In this case, the disc does not tilt, and the disc is pressed to ensure reliable and stable fixing for a long period of time.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a disk fixing device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing the construction of an embodiment of a disk fixing device of the present invention, and FIG. 2 is a portion A in FIG.
It is a cross-sectional view showing a configuration according to line A.

In FIG. 1, in this example, an optical disk 12 from which recording data is read, and a rotary table 14 on which the optical disk 12 is placed and which is rotated by a step motor (not shown) (corresponding to the disk rotating / holding means in the claims). And). The rotary table 14 includes a concave portion 14a and two shafts 14 protruding vertically from the center of the concave portion 14a.
b and 14c. The shaft 14b has a sharp tip, and the shaft 14c is rotationally driven by a step motor (not shown).

Further, in this example, the coil spring 16 is used.
(Corresponding to the elastic member in the claims) and a movable pressing piece 18 (corresponding to the conical member in the claims) to be inserted into the hole at the center of the optical disk 12 arranged on the rotary table 14. .

The movable pressing piece 18 has a mountain-shaped portion 18a.
And the rotary table 14 at the center of the mountain-shaped portion 18a.
A through hole 18b having a diameter through which the shaft 14b of
In the lower part, a collar 1 having a diameter larger than that of the mountain-shaped portion 18a
8c and.

Also, in this example, a concave clamper 10 that moves downward in the drawing to press the optical disk 12 is used.
(Corresponding to the disk support means in the claims) is provided. The inner diameter of the clamper 10 is a diameter that allows the collar 18c of the movable pressing piece 18 to be fitted therein and move up and down, whereby the movable pressing piece 1 in the clamper 10 is moved.
8 is designed to move up and down.

Furthermore, a coil spring 16 is arranged between the bottom of the clamper 10 and the movable pressing piece 18, and the coil pressing spring urges the movable pressing piece 18 toward the rotary table 14 at all times. .

Next, the operation and function of the configuration of this embodiment will be described.

FIG. 3 is a sectional view showing a state in which the optical disc is fixed. In FIG. 3, this example shows an optical disc 1.
2 is mounted and placed on the end surface of the concave portion 14a of the rotary table 14.

After that, the clamper 10 moves downward (indicated by the arrow m in FIG. 3) by a pressing mechanism (not shown). In this case, the end surface of the clamper 10 is the optical disk 12
It moves to the extent that it touches the outer peripheral member and stops. Even after the clamper 10 is stopped, the movable pressing piece 18 keeps the optical disc 1
Press 2.

That is, the movable pressing piece 18 is urged by the coil spring 16, and the urging force causes the movable pressing piece 1 to move around the member around the mounting hole at the center of the optical disk 12.
The mountain-shaped portions 18a of 8 contact and press. As a result, the optical disk 12 is positioned and fixed at the central axis position of the rotary table 14.

In this case, the disk 12 is the rotary table 1.
Since the disk 12 is not inclinedly arranged on the disk 2, the disk 12 does not tilt when the disk 12 is pressed and fixed by the movable pressing piece 18 thereafter.

In addition, as described above, a soft member or the like is not used, and only the same components as those shown in FIGS. 4 and 5 are used. Therefore, stable and reliable fixing can be performed for a long period of time, and the disc 12
It will not come into contact with the reading mechanism around.

Although the coil spring 16 presses the space between the clamper 10 and the rotary table 12, a magnet having a conventional structure may be used to generate a pressing force by its attracting force. Similar effects can be obtained.

[0031]

As is apparent from the above description, in the disk fixing device according to the first aspect, the clamper moves after one surface of the disk contacts the rotating surface of the disk rotating / holding means, and the conical member is moved. Since the disc is inserted into the center hole of the disc and the disc is positioned, the disc does not tilt when pressing the disc, and stable and reliable fixing can be achieved for a long period of time.

In the disc fixing device according to the second or third aspect, the insertion shaft of the disc rotating / holding means is fitted into the insertion hole of the conical member when the disc is mounted, and further, when the disc is fixed, it is elastic. Since the disc is pressed by the member or the magnet, the disc is not tilted, and the disc is pressed so that the disc can be surely and stably fixed for a long period of time.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an embodiment of a disk fixing device of the present invention.

FIG. 2 is a cross-sectional view showing a configuration taken along line AA in FIG.

FIG. 3 is a cross-sectional view showing a state in which an optical disc is mounted and fixed in the embodiment.

FIG. 4 is a cross-sectional view showing a configuration of a conventional disk fixing device.

FIG. 5 is a cross-sectional view showing a state in which an optical disc in a conventional example is mounted and fixed.

[Explanation of symbols]

 12 optical disk 14 rotary table 14a concave shape portions 14b and 14c shaft 16 coil spring 18 movable pressing piece 18a mountain-shaped portion 18b through hole 18c collar 10 clamper

Claims (3)

[Claims] 1. A disk rotating / holding means provided on one surface side of a disk to be mounted, and a disk rotation / holding means provided on the other surface side of the disk in a central hole of the disk when mounting and fixing the disk. A disc fixing device comprising: a conical member to be inserted; and a disc supporting means for arranging the conical member, reciprocating in the direction of the rotation axis, and supporting the other surface of the disc. 2. A disc rotating / holding means is provided with an insertion shaft projecting from a central portion of the disc arranging side, and an insertion hole into which the insertion shaft is fitted and inserted is provided in the conical member. Between the support means and the conical member,
The disk fixing device according to claim 1, further comprising an elastic member that generates a pressing force when fixing the disk. 3. A disc rotating / holding means is provided with an insertion shaft projecting from a central portion of the disc arranging side, and an insertion hole into which the insertion shaft is fitted and inserted is provided in the conical member. Between the support means and the conical member,
2. The disk fixing device according to claim 1, further comprising a magnet that generates a pressing force when fixing the disk.