JPH03248368A - Disk loader - Google Patents

Abstract

PURPOSE:To prevent a disk surface from flawing by forming a housing recessed part for housing a disk with a reference of a position where an edge part of a circumferential periphery of the disk contacts with a disk holding member when the disk is inclined to the disk holding member. CONSTITUTION:In the reproducing state of a compact disk (CD) 5, a turntable 1 is in a horizontal state, and a chassis 3 is turned downward around a fulcrum 3a by a driving mechanism from this state, and then the table 1 is inclined and the CD 5 is inclined as well accordingly. Then, an edge part of the outer circumference on the left side of the CD 5 contacts with a CD seat 4a of the disk housing part 4. Moreover, when a chassis 3 is turned downward around the fulcrum 3a, the CD 5 is turned clockwise around a fulcrum of the CD seat 4a. Now, since a CD groove 4b is formed to have a prescribed gap on a concentric circle conformed with the CD 5 in center, the CD groove 4b is formed to be deviated from a center position of the table 1 by a distance of (L2-L1) in the reproducing state. By this method, the CD surface is prevented from flawing.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a disc mounting device, and more particularly, the present invention relates to a disc mounting device, and in particular, a disc held by a disc holding member is tilted from the bottom surface by a mounting member that rotates around a predetermined fulcrum. The present invention relates to a disc loading device for reproducing information on a disc by lifting the disc.

[Prior Art] Conventionally, when playing back a disc on which information has been written in an optical disc player, etc., the disc is lifted from a disc holding member that stores and holds the disc, the information on the disc is played back, and after playing, the disc is A disc mounting device has been proposed that allows a disc holding member to hold the disc again. The mounting method involves tilting and lifting the disc from its underside using a mounting member that rotates around a predetermined fulcrum, playing back the information on the disc, and then holding the disc in the disc holding member again after playback. It is considered.

[Problems to be Solved by the Invention] As mentioned above, conventionally, as a method for placing a disc on which information has been recorded in a playback state into a disc storage section of a disc holding member, a turntable with a disc attached thereto has been used. It has been considered that the disc is rotated around a predetermined fulcrum and the disc is placed in a disc accommodating portion of a disc holding member.

However, in this method in which the turntable rotates to place the disc, the center position of the turntable that rotates the optical disc in the playback state is formed to match the center position of the disc storage part of the disc holding member. There is. That is, when the optical disc is being played back, the center position of the optical disc and the center position of the disc storage portion of the disc holding member match.

However, when the turntable rotates about a predetermined fulcrum after playback and the optical disc is tilted so that one end of its outer circumference is in contact with the surface of the disc housing, the center position of the optical disc and the center position of the disc housing become misaligned. The inconvenience of being in this situation occurs.

As a countermeasure to this problem, the outer diameter of the disk has been regulated and the inner diameter of the disk storage portion for storing and holding the disk has been increased to absorb the difference in the center. As a result, when the optical disc is stored in the disc storage compartment, the gap between the outer periphery of the optical disc and the inner periphery of the disc storage compartment increases, causing the optical disc to move horizontally, causing the optical disc surface to rub and causing scratches on the optical disc. There is a problem.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a disc mounting device that can effectively prevent scratches on the disc surface.

[Means for Solving the Problems] The disc mounting device of the present invention is a storage device for storing a disc based on a position where one end of the peripheral edge of the disc contacts the disc holding member when the disc is tilted to the disc holding member. A feature is that a recess is formed.

[Function] In the disc mounting device according to the present invention, a storage recess is formed in the disc holding member to store the disc based on a position where one end of the peripheral edge of the disc contacts the disc holding member when the disc is tilted. Therefore, the gap between the storage recess and the disk can be reduced.

[Embodiment of the Invention] FIG. 1 is a schematic diagram showing the configuration of a disk loading device showing an embodiment of the invention. Referring to FIG.
a turntable 1 for rotating a turntable (referred to as D); a spin motor 2 connected to the turntable 1 and serving as a drive source for rotating the turntable 1; It includes a rotatably installed chassis 3 and a disc holding member 4 for storing and holding an 8cm CD.

The turntable 1 includes a CD center portion 1a that serves as a guide when determining the center position of an 8cm CD 5, a CD receiver 1b that receives the bottom surface of the 8cm CD, and a CD center portion 1a that serves as a guide when determining the center position of a laser disc (hereinafter referred to as LD). L as a guide
It is composed of a D center portion 1c, a disk support portion 1d which serves as a support during playback of various types of disks, and a boss portion 1e to which a spin motor 2 is attached.

Further, the spin motor 2 is connected to the boss portion 1 of the turntable 1.
The motor shaft 1a is attached to the chassis 3, and includes a motor shaft 1a for press-fitting and fixing to the motor shaft 1a.

The steering wheel 3 is attached to a fulcrum 3a of the first disc player main body (not shown) so as to be freely rotatable in the vertical direction about the fulcrum 3a.

The disc holding member 4 has an 8cm CD seat 4a for storing and holding an 8cm CD5, a 3cm CD groove 4b, and a 12c
12cmC for storing and holding mCD (not shown)
D seat 4c and 12cm CD groove 4d, and 2°cm LD seat 4e and 20cm LD for storing and holding the 20cm LD.
a groove 4f, a 30cmLD seat 4g and a 30cmLD groove 4h for storing and holding a 30cmLD (not shown);
It also includes an escape hole 41 for an optical pickup (not shown) for reading information stored on various disks.

In addition, when playing an 8cm CD5, that is, in a horizontal state, the center position is the 8cm CD5 for storing and holding the gcmcD5.
It is placed at a predetermined interval shifted from the center position of the mCD groove 4b. That is, 8 cmC from the fulcrum 3a of the chassis 3
The distance to the center position of D5 is Ll, and the distance from the fulcrum 3a to the center position of the 8 m CD groove 4b is L2. Note that a chucking hole 5a is formed in the 8 cm D5.

2 to 4 are schematic diagrams for explaining the operation of the disk loading device shown in FIG. 1.

Next, the operation of the disk loading device will be explained with reference to FIGS. 1 to 4. First, as shown in Figure 1,
The turntable 1 is in a horizontal state when playing an 8cm CD5. From the state shown in FIG. 1, the chassis 3 is rotated downward about the fulcrum 3a by a drive mechanism (not shown). As a result, as shown in FIG. 2, the turntable 1 is tilted, and the CD 5 is also tilted by 8 cm. Then, one end of the left side outer periphery of the gcmcD5 comes into contact with the 8cm CD seat 4a of the disk storage section 4.

When the chassis 3 is further rotated downward about the fulcrum 3a from the state shown in FIG.
The cmCD seat 4a rotates clockwise about the fulcrum A, resulting in the state shown in FIG. 3.

Here, the 8cm CD groove 4b is the 8cm CD groove 4b in the state shown in FIG.
It is formed on a concentric circle that coincides with the center of D5 with a predetermined gap. Therefore, as described above, the 8 cm CD groove 4b is formed at a distance of (L2-Ll) from the center position of the turntable 1 in the playback state (horizontal state).

In the present embodiment, with this configuration, the CD is adjusted in anticipation of the shift in the center position of the turntable 1 caused by the rotation of the chassis 3 when storing the disc, as in the conventional case.
There is no need to increase the inner diameter of the groove, and as a result, it is possible to effectively prevent the inconvenience of scratches on the CD surface caused by the large gap between the outer diameter of the CD and the inner diameter of the CD groove as in the past. I can do it.

Further, when transitioning from the state shown in FIG. 3 to the playback state, the turntable 1 is rotated upward by the chassis 3, as shown in FIG. 4. In this case, the 8cm CD 5 is centered by the upper slope of the CD center portion 1a of the turntable 1 and rotated further upward, thereby transitioning from the state shown in FIG. 2 to the state shown in FIG. 1, resulting in a normal playback state. (parallel state). In addition, in this example, 3cmCD
Although 12c has been described, the present invention is not limited to this.
Similarly, in the case of mCD, 20 cm LD, and 30 cm LD, corresponding disc storage grooves are formed in the disc holding member 4 at different heights, and the center positions of the respective storage grooves 4d, 4f, and 4h are Since each disc is formed based on the position where one end of the disc contacts the CD seat or the LD seat when storing the disc, the same effect can be achieved in a multi-disc player.

As described above, in this embodiment, in a type in which the turntable rotates around a predetermined fulcrum to attach and detach the disc, the storage groove is set based on the position where the disc is actually tilted and one end touches the storage groove. Therefore, the gap between the disc storage groove and the disc can be reduced. Therefore, the movement of the disc in the disc storage section can be restricted, and scratches due to rubbing on the disc surface can be effectively prevented.

[Effects of the Invention] As described above, according to the present invention, the disc holding member is provided with storage for storing the disc based on the position where one end of the peripheral edge of the disc touches the disc holding member when the disc is tilted. By forming four parts, it is possible to reduce the gap between the storage recess and the disc.
It is possible to effectively prevent scratches on the disc surface.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a disc loading device according to an embodiment of the present invention, and FIGS. 2 to 4 are schematic diagrams for explaining the operation of the disc loading device shown in FIG. 1. It is. In the figure, 1 is a turntable, 2 is a spin motor,
3 is the chassis, 4 is the disk holding member, 4a is 8cmC
D locus, 4b is an 8cm CD groove, and 5 is an 8cm CD. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] A disc held by a disc holding member is tilted and lifted from the lower surface by a mounting member that rotates around a predetermined fulcrum to reproduce information on the disc, and after reproduction, the disc is held by the disc holding member. In the mounting device, a storage recess for storing the disk is formed in the disk holding member with reference to a position where one end of a peripheral edge of the disk contacts the disk holding member when the disk is tilted. Features: Disc loading device.