JP2002150647A - Turntable for disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk drive turntable which is provided with a function to store a plurality of disks. SOLUTION: A turntable (10) for disk drive is provided with a plurality of disk holding means (30), each of which internally stores balls (35) to detain a disk (2) and is constituted by elastically projecting part of detaining bodies outside from an aperture part (33) provided in the outer peripheral part by the energizing force of a spring (34), in the rotation axial direction. That is, a prescribed disk is easily found out and disks are prevented from being lost because the turntable is provided with the function to collectively store a plurality of disks.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable for a disk drive having a function of accommodating a plurality of disks.

[0002]

2. Description of the Related Art Hitherto, an optical disk device for reading and reproducing information optically recorded on a disk-shaped recording medium (disk) has been known, and is used for a CD player, a car navigation system, and the like. Have been.
The optical disk device includes an optical head, a disk drive (rotary motor and turntable), and the like.
The turntable holding the disc is rotated by a rotary motor, and the optical head reads the recorded contents of the disc. As described above, as a disk holding device for holding a disk on the turntable, for example, a device as shown in Japanese Patent Application Laid-Open No. 9-265704 (see FIGS. 4A to 4C). )
It has been known. The disk holding device 100 has a structure in which a plurality of balls 101 elastically protrude to the outside by the urging force of a spring 102. And disk D
Is inserted into the disc holding device 100 so that each ball 10
1 has a structure for locking and holding the disk D.
FIG. 4C is a diagram in which the disk holding device 100 is used in a car navigation system.

[0003]

By the way, for example, in the case where a CD-ROM is used as an information recording disk in the above-described car navigation system, various kinds of necessary information are usually provided in plural for each purpose or region. Recorded on one disc. Therefore, when a predetermined disk is used, it is necessary to find a disk suitable for a use from among the plurality of disks stored in a disk storage case or the like, which is troublesome. In addition, since there are a plurality of discs, the discs may be lost. Further, when the storage location of the disk is far from the disk device main body, it is troublesome to take out a predetermined disk from a disk storage case or the like and load the disk into the disk device.

[0004] The object of the present invention is to solve the above problems,
An object of the present invention is to provide a turntable of a disk drive device having a function of accommodating a plurality of disks.

[0005]

According to a first aspect of the present invention, there is provided a turntable for a disk drive device, wherein a disk serving as an information recording medium is held by a center hole. Then, in the turntable of the disk drive device for rotating and driving, the disk holding means for holding the disk by engaging with the center hole holds each disk in a state where a plurality of disks are stacked. It is characterized in that it is provided with a plurality of stages.

According to the turntable of the disk drive device of the first aspect, the turntable has a function of holding a plurality of disks collectively, that is, the turntable has a function of storing a plurality of disks. Therefore,
A predetermined disk can be easily found. Also,
As in the related art, there is no need to take out a predetermined disk from the storage space of the disk and move it to the disk device main body, thereby facilitating the disk loading operation. Further, since unused disks among a plurality of disks can be collectively stored in the turntable, the risk of disk loss is reduced.

According to a second aspect of the present invention, there is provided a turntable for a disk drive according to the first aspect, wherein a plurality of the disk holding means are housed on the inner peripheral side of the turntable. A locking body (ball 35) that locks in the center hole, and a biasing member (spring 34) that projects the locking body outward from inside the turntable
And characterized by the following.

According to the turntable of the disk drive device of the second aspect, the same effect as that of the first aspect can be obtained, and the disk holding means is a general disk holding using a locking member and an urging member. Since the device is schematically configured by stacking a plurality of devices in the rotation axis direction, the manufacturing cost of the turntable can be reduced.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a turntable of a disk drive according to an embodiment of the present invention;
It is called "turntable". ) Will be described. FIG.
As shown in FIG. 1A, a turntable 10 is joined to a rotating shaft 1 (only a part of the rotating shaft is shown) of a disk driving motor and has a disk 2 mounted on its upper surface. 20, a disk holding means 30 for holding the disk 2 and the like.

The turntable body 20 is, for example, a substantially circular plate made of synthetic resin such as plastic or metal. In the center of the turntable main body 20, a bearing hole 21 into which the rotating shaft 1 of the disk drive motor is inserted is provided.

The disk holding means 30 is a cylindrical body formed by arranging a plurality of disks in the rotation axis direction to lock the disk 2.
Lower end face 31 of the disk holding means arranged at the lowest side
Is joined to a central portion on the upper surface side of the turntable body 20. Then, by fitting the disk holding means 30 into the center hole 2a of the disk, the disk holding means 30
Locks and holds the disk 2. By rotating the disk drive motor, the disk holding means 30 is rotated.
Rotates integrally with the turntable body 20 while holding the disk 2. In this embodiment, it is assumed that three disk holding units 30 are provided.

The disk holding means 30 is formed of, for example, a synthetic resin such as plastic in a substantially circular shape when viewed in plan. The diameter of the disk holding means 30 is slightly smaller than the diameter of the center hole 2a of the disk. The disk holding means 30 has a plurality of grooves 32 for accommodating a spring 34 as an urging member and a steel ball 35 as a locking member therein, and a part of the ball 35 accommodated in the groove 32. And an opening 33 for projecting the outside to the outside.

A plurality of grooves 32 are provided in the radial direction from the center of the disk holding means 30 so that the cross-sectional shape is substantially circular. The intervals between the plurality of grooves 32 are substantially equal angular intervals, and in the present embodiment, three grooves 32 are provided at intervals of about 120 degrees. Groove 3
2 is formed to be slightly larger than the diameter of the ball 35,
Can be moved. The groove 32 forms an opening 33 on the outer peripheral surface of the disk holding means 30.

The opening 33 is formed in a substantially circular shape on the outer peripheral surface of the disk holding means 30 as described above. Since the diameter of the opening 33 is slightly smaller than the diameter of the ball 35, a part of the ball 35 can protrude from the opening 33.

As the spring 34, for example, a coil spring is used, and its diameter is smaller than the diameter of the ball 35. One end of both ends of the spring 34 contacts the end face 32 a of the groove 32, and the other end
Support 5 The combined length of the spring 34 and the ball 35 is longer than the length of the groove 32 in the longitudinal direction. Therefore, in the normal state, that is, in a state where no external force is applied to the ball 35, a part of the ball 35 protrudes from the opening 33 by the urging force of the spring 34. State. When an external force is applied to the ball 35, the ball 35 moves toward the center against the urging force of the spring 34 and is stored in the groove 32. Since the ball 35 is not fixed to the spring 34, the ball 35 is rotatable.

The turntable 10 is schematically constructed by arranging a plurality of disk holding means 30 having the above-described structure in the direction of the rotational axis and joining the disk holding means 30 to the turntable body 20. The joining of the plurality of disc holding means 30 and the joining of the disc holding means 30 and the turntable body 20 are performed, for example, by a plurality of mounting pieces (not shown) along the circumferential direction on the lower surface side of the disc holding means 30. ), The disk holding means 30 and the turntable body 20
A mounting groove (not shown) is provided on the upper surface at a position corresponding to the mounting piece. Then, the mounting is performed by engaging these mounting pieces with the mounting grooves. In this case, FIG.
As shown in (B), the balls 35 provided in each disk holding means 30 are arranged uniformly in the circumferential direction when viewed in a plan view.

Next, a method of holding a disk by the turntable 10 of the disk drive will be described. First, as one disk 2 is inserted into the turntable 10, the edge of the center hole 2a on the lower surface of the disk comes into contact with the ball 35 of the disk holding means 30 located at the uppermost position. When the ball 35 is pressed in the center direction by the disk 2, the ball 35 moves in the center direction while rotating, and finally substantially the entire ball 35 is temporarily stored in the groove 32. . As the disc 2 is further inserted from this state, the pressing of the disc 2 against the balls 35 is gradually released, and each ball 35 moves outward again by the urging force of the spring 34.
When the disk 2 completely passes through the disk holding means 30, each ball 35 returns to the normal state in which a part of the ball 35 projects from the opening 33. The same operation is performed in the disk holding means 30 located at the middle stage as the disk 2 is inserted.

Similarly, in the disk holding means 30 located at the lowermost position, substantially the entire ball 35 is temporarily stored in the groove 32 as the disk 2 is inserted. Ball 35 by urging force
Moves outward again from the opening 33. As shown in FIG. 2, when the insertion of the disk 2 is completed, that is, when the disk 2 is mounted on the turntable body 20, the ball 35 provided in the lower disk holding means 30 is positioned at the center of the disk. The disc 2 is locked and held by abutting against the upper edge portion of the hole 2a. When only one disk 2 is set on the turntable 10, the operation is completed.

When a plurality of discs (for example, three discs) are set on the turntable 10, the above-described disc insertion operation is repeated. In this case, the disk 2 to be used is first inserted into the turntable 10 so that the disk 2 to be actually used is located at the lowest position among the plurality of disks 2. As shown in FIG.
In a state where the two disks 2 are inserted to the predetermined positions, the balls 35 provided in the middle and lower disk holding means 30 are provided.
Is in contact with the inner peripheral surface of the center hole 2a of the disc,
It will be in the state accommodated in the groove 32. Since the ball 35 urged by the spring 34 comes into contact with the inner peripheral surface of the center hole 2a of the disk, an effect of suppressing the vertical movement and rotation of the disk 2 is achieved. Then, the ball 35 of the upper disk holding means 30 abuts on the upper edge portion of the center hole 2a of the uppermost disk of the three disks, whereby the entire three disks are locked, The holding of the disk by the turntable 10 is completed.

When inserting a plurality of discs into the turntable 10, the discs may be inserted one by one as described above, or a plurality of discs may be inserted collectively. Also, when replacing disks, that is, when using one of the two unused disks, once all three disks are turned on the turntable 10.
After rearranging the disks so that the disk to be used is located at the lowest position, turn the turntable 10 again.
Insert

The turntable 10 according to the present embodiment
According to this, the turntable 10 collectively holds a plurality of disks, that is, the turntable 10 has a function of storing a plurality of disks. Therefore,
A predetermined disk can be easily found. Also,
As in the related art, there is no need to take out a predetermined disk from the storage space of the disk and move it to the disk device main body, thereby facilitating the disk loading operation. In addition, since the unused disks among the plurality of disks can be collectively stored in the turntable 10, the risk of loss of the disks is reduced. Further, since the disk holding means 30 for holding a plurality of disks is generally constituted by stacking a plurality of general disk holding devices using springs 34 and balls 35 in the direction of the rotation axis, the manufacturing cost of the turntable 10 is reduced. Can be suppressed.

In the present embodiment, a steel ball 35 is used as the locking member of the disk holding means 30.
However, the present invention is not limited to this. For example, as shown in FIG.
May be used. In this case, as the disk is inserted, the edge of the center hole 2a of the disk slides on the inclined surface 40a of the locking body, so that the locking body 40 moves in the radial direction. Each of the disk holding means 30 has approximately 120
Although the three grooves 32 are provided at equal angular intervals in degrees, the present invention is not limited to this, and two or three or more grooves 32 may be provided. Further, the number of disk holding means 30 forming the turn disk 10 can be arbitrarily changed. Further, the opening 33 is provided on the outer peripheral surface side of the disk holding means 30. However, the present invention is not limited to this. For example, the opening 33 extending from the outer peripheral surface to the upper surface is provided, and a part of the ball 35 is It may be protruded from both sides of the side surface and the upper surface. Further, the joining between the plurality of disc holding means 30 and the joining between the disc holding means 30 and the turntable main body 20 are performed using a well-known joining method other than the above-described method using the mounting piece and the mounting groove. Alternatively, a plurality of disk holding means 30 may be provided by integral molding.

[0023]

According to the turntable of the disk drive according to the first aspect, a predetermined disk can be easily searched for. Also, the work of loading the disc becomes easy.
Also, the risk of loss of the disk is reduced.

According to the turntable of the disk drive according to the second aspect, the same effect as that of the first aspect can be obtained, and the manufacturing cost of the turntable can be suppressed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view (A) and a plan perspective view (B) showing the structure of a turntable according to the present embodiment.

FIG. 2 is a longitudinal sectional view showing a state of holding a disk by a turntable.

3A is a longitudinal sectional view showing an example of the structure of a turntable, and FIG. 3B is a perspective view showing a locking body used.

FIG. 4 is a side view (A) showing a structure of a conventional turntable (disk holding device), a plan view (B), and an essential part perspective view (C) showing a car navigation system including a turntable.

[Explanation of symbols]

 2 Disc 2a Center hole 10 Turntable of disc drive 30 Disc holding means 33 Opening 34 Spring 35 Locking body (ball)

Claims (2)

[Claims] 1. A turntable of a disk drive device for holding and rotating a disk, which is an information recording medium, with a center hole, wherein a disk holding means for holding the disk by engaging with the center hole is provided. A turntable for a disk drive device, comprising a plurality of stages for holding individual disks in a state where a plurality of disks are stacked. 2. The turntable of the disk drive device according to claim 1, wherein a plurality of the disk holding means are housed on an inner peripheral side of the turntable, and are engaged with a central hole of the disk.
A turntable for a disk drive, comprising: an urging member for projecting the locking member outward from the inside of the turntable.