JPH09152U - Disc tray of disc carrier - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce wind noise generated when a disk placed on a turntable rotates. [Structure] A taper surface 5 is formed such that the outer peripheral side descends from the center side of the disk supporting surface of the tray A toward the outer peripheral side, and a disk positioning portion is provided around the disk supporting surface.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is used in a transfer device for transferring an audio compact disc having a diameter of 8 cm, a compact disc for audio of 12 cm, a compact disc for video, and a video disc having a diameter of 20 cm and 30 cm to a turntable from a disc mounting position. The present invention relates to an improvement of a disc tray on which the disc is placed and which is conveyed to a position where it is set on a turntable.

[0002]

[Prior art]

 Conventionally, the upper surface of the disk tray of the disk transfer device of this type is formed as a whole so that the disks of various sizes can be placed thereon. After placing the disc on the turntable, the mounting surface stands by at a position slightly lower than the turntable.

[0003]

[Problems to be solved by the device]

 The disc set on the turntable as described above rotates to reproduce the recording, but as the disc rotates, the air on the surface in contact with the disc also begins to flow in the same direction as the rotation of the disc. Then, since there is a disc tray near the lower surface of the disc, air flows over the disc tray, which causes a wind noise. The present invention is intended to solve the above-mentioned problems of the disc tray of the conventional disc transfer device, in which the rotational linear velocity of the disc surface becomes faster toward the outer periphery of a disc having a large diameter, and thus the air flow becomes closer to the outer periphery. Focusing on the fact that the speed of the disc also becomes faster, the aim is to increase the gap between the disc and the tray toward the outer periphery to reduce the wind noise generated in the disc tray.

[0004]

[Means for solving the problem]

 The present invention relates to a disc tray of a disc transfer device for achieving the above-mentioned object, and a tray for transferring a placed disc to a turntable is provided from the center side of the disc supporting surface toward the outer peripheral side. It is characterized in that a taper surface is formed such that the outer peripheral side descends, and a disk positioning portion is provided around the disk support surface.

[0005]

[Action]

 The disc tray of the disc transporting device of the present invention has a taper surface such that the outer peripheral side descends from the center side of the disc supporting surface toward the outer peripheral side, so that after the disc tray sets the disc on the turntable, When descending from the upper surface of the turntable, the gap between the disc and the disc tray increases toward the outer circumference. However, the air flow on the disk surface becomes faster toward the outer circumference, but becomes slower as it moves away from the disk surface. Therefore, the airflow velocity on the disc tray surface is weakened as the distance between the two increases, and the wind noise can be reduced in the outer peripheral portion where a large wind noise is generated.

[0006]

[Example of the invention]

 Next, an example of implementation of the present invention will be described with reference to the drawings. This tray A has a mounting portion 1 for an audio compact disc having a diameter of 8 cm, a mounting portion 2 for a video having a diameter of 12 cm, a mounting portion 2 for an audio compact disc, a mounting portion 3 for a video disc having a diameter of 20 cm, and a diameter. A disc mounting portion 4 of a 30 cm video disc is formed on the upper surface over several steps. Then, from the mounting portion 4, a tapered conical taper surface 5 is formed which descends toward the outer circumference. Further, around the tapered surface 5, there is provided a positioning portion 6 for positioning a video disk having a diameter of 30 cm on the tray.

This tray A is a turntable for loading the discs from the loading position on which the discs of the various sizes described above are placed by a transporting unit known as a disc loading device. After being transported to the set position placed above, it descends to a position below the upper surface of the turntable and stands by. Therefore, the space between the lower surface of the disc set on the turntable and the tray A increases from the mounting portion 4 to the outer periphery.

When this disc is sandwiched between the turntable and the clamper and rotated by the rotation of the turntable, the air layer in contact with the turntable comes to flow according to the rotation of the turntable.

The velocity of this air flow increases as the linear velocity of the disc increases toward the outer periphery of the disc, but decreases as the distance from the disc increases due to the resistance between the air layers.

Therefore, when the outer peripheral airflow hits the tray A, the speed of the airflow becomes slower than that in the case where the tray A and the disk are equidistant, and wind noise is reduced more than in this case. Is something that can be done.

[0011]

[Effect of the invention]

 According to the present invention, as described above, the wind noise caused by the rotation of the disc can be reduced by only slightly changing the shape of the disc tray, and therefore the cost is not increased. Is to have.

[Submission date] May 21, 1996

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

[Industrial application] The present invention turns an audio compact disc with a diameter of 8 cm, an audio compact disc with a diameter of 12 cm, a compact disc for a video, a video disc with a diameter of 20 cm and a diameter of 30 cm from a disc mounting position. The present invention relates to an improvement of a disc tray used for a transport device for transporting to a table and transporting the disc to a position where the disc is placed and set on a turntable.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction contents]

[0002]

[Prior art]

 Conventionally, a disc tray of this type of disc transporting device is adapted to mount discs of various sizes as described above, for example, a mounting face for a small-diameter disc and a mounting face for a large-diameter disc. Are concentrically formed with steps. Each mounting surface is formed as a flat surface as a whole. After the disc is placed on the turntable, the placement surface of the disc tray stands by at a position slightly lower than the turntable.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003]

[Problems to be solved by the device]

 When a disc is placed on this disc tray, there is a problem that the disc surface and the disc mounting surface contact each other and the disc surface is damaged. The present invention aims to solve this problem.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

[Means for solving the problem]

 The present invention relates to a disc tray of a disc transfer device for achieving the above-mentioned object, and a large-diameter disc mounting portion formed with a small-diameter disc mounting portion and a step around the small-diameter disc mounting portion. The large-diameter disc mounting portion is characterized by being formed in a substantially ring shape having a smaller diameter than the large-diameter disc to be mounted.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

[Action]

 According to the disc tray of the disc carrier of the present invention, since the large-diameter disc is mounted on the large-diameter disc mounting portion that is larger in diameter than the small-diameter disc and smaller in diameter than the large-diameter disc, The contact area between the tray and the tray becomes smaller and the risk of scratching the disk surface is reduced.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

[Example of the invention]

 Next, an example of implementation of the present invention will be described with reference to the drawings. This tray A has a mounting portion 1 for an audio compact disc having a diameter of 8 cm, a mounting portion 2 for a video having a diameter of 12 cm, a mounting portion 2 for an audio compact disc, a mounting portion 3 for a video disc having a diameter of 20 cm, and a diameter. A disc mounting portion 4 of a 30 cm video disc is formed on the upper surface over several steps. Here, the disc mounting portion 4 is formed in a substantially ring shape having a diameter larger than that of the video disc having a diameter of 20 cm and smaller than that of the video disc having a diameter of 30 cm. Then, from the mounting portion 4, a tapered conical taper surface 5 is formed which descends toward the outer circumference. Further, around the tapered surface 5, there is provided a positioning portion 6 for positioning a video disk having a diameter of 30 cm on the tray.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

[Effect of the invention]

 As described above, the present invention includes a small-diameter disk mounting portion and a large-diameter disk mounting portion formed with a step around the small-diameter disk mounting portion, and the large-diameter disk mounting portion is mounted. The large-diameter disc is characterized by being formed in a substantially annular shape having a diameter smaller than that of the large-diameter disc. Since it is placed on the disk, the contact area between the disk surface and the tray is reduced, and the risk of scratching the disk surface is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of one embodiment of the present invention.

[Explanation of symbols]

 A: Disc tray 4: Mounting part 5: Tapered surface

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[Procedure amendment]

[Submission date] May 21, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (1)

[Utility model registration claims] 1. A taper surface is formed on a tray that conveys a mounted disk to a turntable, the outer peripheral side descending from the center side of the disk supporting surface toward the outer peripheral side,
A disc tray of a disc transporting device, wherein a disc positioning portion is provided around the disc supporting surface.