JPH07320468A - Disc tray - Google Patents

Abstract

(57) [Abstract] [Purpose] In a disc tray used in a disc recording / reproducing apparatus, a material with a small number of parts is used to reduce the number of materials and assembling steps, while maintaining the conventional performance and providing a low-priced disc tray. The purpose is to do. [Structure] Of the first to fourth annular recesses 4 to 7 provided in the disc tray 1 for allowing the disks 3 having different diameters to be installed concentrically, the bottom surfaces of the annular recesses 6 and 7 are formed. An integral disk protection member 2 is provided so as to extend over a continuous surface thereof on the side of the annular recess having a diameter larger than the outer diameter position of the annular recess having the smaller first diameter, and the continuous surface serves as an inclined surface. ing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc tray in which discs having different diameters are installed and moved, and then the discs are mounted on a disc rotation driving means.

[0002]

2. Description of the Related Art In recent years, disc players for reproducing discs of various diameters are required to maintain their performance while reducing the number of parts and improving the assembling property in order to reduce the cost. Along with this, it is required to reduce the number of parts in the disc tray, which is one of the constituent elements.

The structure of a conventional disc tray will be described below. FIG. 5 is a perspective view showing the structure of a conventional disc tray.

In FIG. 5, 11 is a disc player main body, and 21 is a disc tray. In order to allow discs 3 having different diameters to be installed concentrically, the discs 3 from the center closer to the outer diameter of the discs 3 can be installed. First, second, third, and fourth annular recesses 24 to 27 are provided, and the discs 3 having respective diameters are installed in the annular recesses 24 to 27 in a one-to-one correspondence.
Reference numeral 22 denotes a disk protection member, which is a third and a fourth annular recesses 26, 2 in which a large disk 13 that is easily scratched is installed
A plurality of them are provided on the lower surface of the disk 7 to prevent the signal surface of the disk 3 and the disk tray 21 from directly contacting each other, thereby preventing deterioration of the signal reading ability due to scratches or the like. Reference numeral 10 is a tray drive device that moves the disc tray 21 between a first position where the disc 3 can be taken out and a second position where the disc 3 is played back. 12 is a disc drive on the disc tray 21 at the second position. It is a disk rotation driving means for making it.

The operation of the disc tray configured as described above will be described. As is well known, in order to rotate and reproduce the discs 3 having various diameters by the disc rotation driving means 12, the disc tray 21 having the concentric annular concave portions corresponding to the respective diameters is provided on the first position. Installed
It is moved to the second position by the tray drive means 10 and is rotated and reproduced by the disk rotation drive means 12.

[0006]

However, in the conventional structure, in order to prevent scratches and dirt from adhering to the signal surface of the disc, it is necessary to prevent the disc from coming into contact with the tray on the bottom surface of the annular recess of each diameter. It was necessary to provide a sufficient number of disc protection members in a one-to-one relationship with the disc diameter. In this case, only the types of disc diameters on which the disc protection members can be installed are required, and the types of discs with installable diameters increase. Therefore, the number of disk protection members increases, and the number of parts and the number of man-hours for assembling increase significantly.

The present invention solves the above-mentioned conventional problems by reducing the number of disk protective members used,
An object of the present invention is to provide a disc tray which is cost-effective in terms of the number of assembly steps.

[0008]

In order to achieve the above object, the present invention provides a plurality of annular recesses having different diameters corresponding to installable disk diameters on the bottom surface of a plurality of annular recesses having continuous steps. An integral disc protection member is provided.

[0009]

With this structure, the disc tray can be constructed by greatly reducing the disc protection member for the types of discs having installable diameters that require prevention of scratches and adhesion of dirt. Improves ease of assembly,
It is possible to provide a cost-effective disc tray.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a disc tray according to a first embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of the disc tray. In FIG. 1, in the same manner as in the conventional example, four kinds of discs 1 having different diameters can be installed on the disc tray 1 in a concentric circle. Recesses 4 to 7 are provided. There is a first annular recess 4 of the smallest diameter on the innermost circumference,
Next, a second annular recess 5 having a diameter smaller than that of the bottom surface of the first annular recess 4 by one step is formed, and a second annular recess 5 having a diameter smaller than that of the second annular recess 4 is provided on the outer periphery of the second annular recess 5. A third annular recess 6 having a smaller diameter is provided, and a fourth annular recess 7 having the largest diameter having a bottom surface one step higher than the bottom surface of the third annular recess 6 is provided on the outer periphery thereof. There is. Reference numeral 2 denotes a disk protecting member, which is provided continuously on the bottom surface of each of the fourth annular recess 7 and the third annular recess 6, as shown in FIG. In this embodiment, four disc protection members 2 are provided for each type of disc 3 so that the discs can be stably installed. This one kind of disc 3
It goes without saying that the number of disk protection members 2 for protecting the disk need not be four.

The disc protection member 2 is generally made of felt, synthetic leather or the like. To make it inexpensive, a sheet material such as felt or synthetic leather is used with an adhesive or the like for the disc tray 1. Stuck to. For this reason, since the disc protection member 2 has a thickness, when it is attached to the disc tray 1, the small size corresponding to the annular recess 6 at the position where the height continuously changes from the annular recess 6 to the annular recess 7 as shown in FIG. In order to prevent the disk 3a from entering the outside of the outside diameter 8, the position where the height changes is larger than the outside diameter 8 of the small disk 3a corresponding to the annular recess 6 and the position where it enters the annular recess 7 side. Has become. As a result, the small disk 3a can be installed without being affected by the thickness of the disk protection member 2, and the large disk 3b can be installed as shown in FIG. In addition, since the disk protection member 2 is a flat plate having a supple and supple shape by itself, in order to prevent the disk protection member 2 from being peeled off by bending at a position where the height changes,
Considering the assemblability of the disk protection member 2, the mounting surface at the position where the height changes is a continuous inclined surface 9.

As a result, it is possible to integrate the disc protection member corresponding to the disc of the first diameter and the disc protection member corresponding to the disc of the second diameter.

As described above, the number of disk protection members 2 for holding disks of two different diameters is half that required in the past, which reduces the number of parts used and the number of assembly steps by about half. It becomes possible.

In this embodiment, the disk protection member 2 is installed only in the two stages of the third and fourth annular recesses 6 and 7, but it goes without saying that it is not limited to this.

[0016]

As described above, according to the present invention, it becomes possible to drastically reduce the number of disk protective members for holding disks having several kinds of diameters from the number conventionally required, and as a result, the amount of material used can be reduced. It is possible to reduce the number of assembling steps.

[Brief description of drawings]

FIG. 1 is a perspective view of a disc tray according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of a disc tray according to the first embodiment.

FIG. 3 is a sectional view of a disc protection member when a small disc is installed.

FIG. 4 is a sectional view of a disk protection member when a large disk is installed.

FIG. 5 is a perspective view of a conventional disc tray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 disc tray 2 disc protection member 3 disc 4 first annular recess 5 second annular recess 6 third annular recess 7 fourth annular recess 8 annular recess outer diameter position 9 inclined surface 10 tray driving means 11 main body 12 disc Rotation drive means

Claims (3)

[Claims] 1. A tray drive means for moving a disc tray, and a first position in the main body where the disc can be set by the tray drive means to a second position in the main body where the disc can be rotationally driven by the rotary drive means. A disc tray for use in a disc player composed of a movable disc tray, wherein the disc recess has a plurality of annular recesses of different diameters capable of concentrically installing discs of different diameters. Among them, a disc tray provided with an integral disc protection member provided over the bottom surfaces of a plurality of continuous annular recesses having different diameters. 2. From the bottom surface of the small annular recess to the bottom surface of the other large annular recess at a position that is larger than the outer diameter of one of the smaller annular recesses of the adjacent annular recesses. 2. The disc tray according to claim 1, wherein the disc tray has a surface of the disc protection member whose height changes. 3. A boundary surface between a bottom surface of an annular recess having a smaller diameter and a bottom surface of an annular recess having a larger diameter, which is different in height, of the mounting surface of the disk protection member on the disk tray is an inclined surface. The disc tray according to claim 2, wherein