JPH0621077Y2 - Disk device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device, and more particularly to a disk device that can be thinned.

2. Description of the Related Art Generally, in a disc device, a disc is mounted by a disc loading mechanism on a turntable rotated by a spindle motor, and a recording / reproducing process (in some cases, only a reproducing process is performed by a pickup arranged to face the disc. ) Is performed.

FIG. 14 shows a schematic configuration of a conventional disk device. In the figure, 1 is a chassis, 2 is a turntable, 3 is a spindle motor, 4 is a pickup, and 5 is a cam plate forming a part of a disc loading mechanism. In the conventional disk device, the spindle motor 3 is fixed to the chassis 1 as shown in FIG. 15, and therefore the positional relationship of the turntable 2 attached to the spindle shaft 6 of the spindle motor 3 with respect to the chassis 1 is unchanged. Was there.

As is well known, the disc loading mechanism generally includes a disc holder (not shown) into which a disc cartridge is inserted and mounted, and a cam plate 5, and the cam plate 5 on the chassis 1 is indicated by an arrow A _1. ，
The disc holder is moved up and down by sliding in the A ₂ direction, and the disc holder is loaded between the eject position and the predetermined mounting position. In this way, the disc holder is moved up and down because the turntable 2 and the spindle shaft 6 are projected on the chassis 1, and the disc cartridge can be inserted without colliding with the turntable 2 and the spindle shaft 6. This is because it is necessary to perform the inserting operation at the upper position of the spindle shaft 6 and to mount the disc on the turntable 2 at the time of recording / reproducing.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, in the magnetic disk device, the turntable 2 and the spindle shaft 6 are projected on the chassis 1, and thus the disk holder is inevitably required to move up and down when loading the disk. Further, the ascending / descending dimension is required to be 6.5 mm to 7.5 mm, for example, when a 5.25-inch optical disk cartridge conforming to the ISO standard is used. There is a problem in that the size required for the elevation is a complete dead space in the magnetic disk device, which makes it impossible to downsize the magnetic disk device.

The present invention has been made in view of the above points, and an object of the present invention is to provide a disk device that can be made thinner.

Means for Solving the Problems In order to solve the above problems, according to the present invention, a disk serving as a recording medium is placed on a turntable and rotated, and at least information recorded on the disk is read by a pickup. In the disc device, a disc holder elevating mechanism for elevating and lowering a disc holder into which the disc cartridge accommodating the disc is inserted and mounted above the main chassis, and a motor chassis to which a spindle motor for rotating the turntable is attached. A motor chassis lifting mechanism for lifting and lowering the main chassis is provided.

Action In the disk device configured as described above, both the disk holder and the motor chassis can move up and down with respect to the main chassis. Therefore, by lowering the motor chassis with respect to the main chassis, the amount of protrusion from the main chassis such as the turntable can be reduced, and thus the size required for raising and lowering the disk holder can be reduced.
Further, other parts and devices necessary for the reproduction processing are arranged on the upper surface and the back surface of the main chassis, and the disk device requires a certain height dimension due to these devices and the like. Therefore, by raising and lowering the disc holder and the motor chassis, it is possible to overlap the above-mentioned inevitable height dimension and the raising and lowering operation range of the disc holder and the motor chassis, and it is possible to reduce the occurrence of dead space.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. Second
The figure is a block diagram of the essential parts of a disk device 7 according to an embodiment of the present invention. The disc device 7 is a device corresponding to, for example, an optical disc having a diameter of 5.25 inches, and includes a main chassis 8, a pickup 9, a disc holder lifting mechanism 10 (only a cam plate 11 is shown), and a motor chassis lifting mechanism 1
2 etc. are provided.

A pickup 9 is attached to the main chassis 8 as indicated by A ₁ and A in the figure.
An opening 13 for moving the pickup so that it can move in _two directions.
And a turntable opening 15 through which the turntable 14 projects is formed as will be described later. Further, elongated holes 16 and 17 are formed on both sides of the pickup 9 and the turntable 14 so as to sandwich them. In addition, in the vicinity of the opening 15 on the back surface of the main chassis 8,
As shown in FIG. 3, the reference surfaces 18, 19 and the positioning hole 2
Brackets 23, 24 for mounting the motor chassis 22, which will be described later, are provided.

The disc holder elevating mechanism 10 has substantially the same structure as a conventional disc loading mechanism, and the cam plate 11 slides in the A ₁ and A ₂ directions to form guide grooves 25a to 25d formed on the side portions. A disc holder (not shown) is moved up and down in the upper part of the main chassis 8 along the above. The cam plate 11 constituting the disc holder elevating mechanism 10 is characterized by having cam portions 26, 27 bent downward at both side edges of an opening provided in the bottom plate portion (see FIG. 4). ). The cam portions 26 and 27 are formed so as to correspond to the long holes 16 and 17 formed in the main chassis 8,
With the cam plate 11 mounted on the main chassis 8, the cam portions 26 and 27 are configured to penetrate the elongated holes 16 and 17 and project to the back surface of the main chassis 8. The cam portions 26 and 27 are composed of lower moving cams 26a and 27a and upper moving cam portions 26b and 27b, and a taper surface is formed between the two cam portions.

The motor chassis lifting mechanism 10 includes the cam portions 26, 2 described above.
7 and the motor chassis 22 shown in FIG. A spindle motor 28 (see FIG. 1) is attached to the back surface of the motor chassis 22, and its spindle shaft 29 penetrates the motor chassis 22 and projects to the upper surface.
4 is attached. As shown in FIG. 5, reference surfaces 30, 31 and positioning pins 32, 33 are provided on the upper surface of the motor chassis 22, and rollers are provided on the shafts 34, 35 extending laterally on both sides. 36 (a roller attached to the shaft 34 is not shown) is attached.

The motor chassis 22 is rotatably attached to the brackets 23 and 24 described with reference to FIG. 3 by using a support shaft 37 (inserting a bearing 38 formed in the motor chassis 22). That is, the motor chassis 22 is rotatably attached to the back surface of the main chassis 8. Therefore, the turntable 14 and the spindle shaft 29 can be moved up and down in the lower part of the main chassis 8 by rotating the motor chassis 22 about the support shaft 37. The support shaft 37 is attached to the bracket 23,
When attached to 24, the coil spring 39 is also attached,
The spiral spring 39 is configured to bias the motor chassis 22 toward the main chassis 8.

FIG. 1 shows a state in which the motor chassis 22 is attached to the main chassis 8. In this state, the roller 36 is provided with the cam portions 26, 2 formed on the cam plate 11.
It is configured to engage with 7. This figure shows the cam plate 11
Indicates the position moved in the A ₁ direction (that is, the eject state). In this state, the roller 36 moves the cam portion 26.
(Hereinafter, only the side shown in the drawing will be described.) Engages with the lower cam portion 26a, so that the motor chassis 22 is pushed down by the cam portion 26, and the turntable 14 and the spindle shaft 29 are attached to the main chassis 8. On the other hand, it is in a low position. As a result, the amount of protrusion of the turntable 14 and the spindle shaft 29 from the main chassis 8 becomes smaller than in the conventional case.

On the other hand, FIG. 6 shows a state where the cam plate 11 has moved in the A ₂ direction (that is, a disc mounted state). By moving the cam plate 11 in the A ₂ direction, the roller 3
6 moves relatively on the cam portion 26 and eventually engages with the upward moving cam portion 26b. Upper moving cam portion 26b
Has a smaller amount of downward projection than the lower cam portion 26a,
Further, since the motor chassis 22 is biased toward the main chassis 8 by the coil spring 39 (see FIG. 5), the motor chassis 22 rotates and comes into contact with the main chassis 8.
At this time, the reference surface 30, which is formed on the motor chassis 22,
31 (see FIG. 5) contacts the reference surfaces 18 and 19 formed on the main chassis 8 for positioning in the height direction, and the positioning pins 32 and 33 formed on the motor chassis 22 are positioned on the main chassis 8. The motor chassis 22 is uniquely positioned with respect to the main chassis 8 by engaging with the positioning holes 20 and 21 formed in the motor chassis 8.

Next, the operation of the disc mounting 7 having the above-mentioned configuration when the disc is mounted will be described.

FIG. 7 shows a state immediately after the disc cartridge 40 is inserted into the disc mount 7. At this time, the cam plate 11 (not shown in the figure) is displaced in the A ₁ direction, and the motor chassis lifting mechanism 12 causes the motor chassis 22 to be in the down position (the state shown in FIG. 1). The amount of protrusion of the turntable 14 and the spindle shaft 29 from the main chassis 8 is small. Therefore, even if the disc cartridge 40 is inserted at a position closer to the main chassis 8 than in the conventional case, the interference with the turntable 14 and the spindle shaft 29 does not occur (the disc cartridge 40 passes over the turntable 14 in FIG. 8). Indicates the state).

As shown in FIG. 7 and FIG. 8, various components and devices including the pickup 9 are provided on the back side of the main chassis 8. Other parts of the device are selected so as not to be significantly larger than the downward projection size of the device. With this configuration, even if the motor chassis 22 can be elevated and lowered under the main chassis 8, the elevation dimension overlaps with the height dimensions of other components, and there is almost no dead space. The space in 7 can be effectively used.

Subsequently, when the disc cartridge 40 is inserted to the upper position of the predetermined mounting position as shown in FIG. 9, the disc holder is vertically moved down in the disc holder elevating mechanism 10 and the chassis base is in the motor chassis elevating mechanism 12. Move 22 up. By these respective operations, as shown in FIG. 10, the turntable 14 and the spindle shaft 29 are engaged with the hub 42 of the disc 41 housed in the disc cartridge 40. At this time, the size of the disc cartridge 40 moving downward is determined by the turntable 14 and the spindle shaft 2 when the cartridge is horizontally inserted.
Since 9 is moving downwards, a small size is sufficient. According to a prototype experiment conducted by the present inventor, when the present invention is applied to an optical disk device having a 5.25-inch diameter according to the ISO standard, it is possible to perform disk loading with about half the size (approximately 3 mm) of the conventional vertical movement size. did it. As a result, the occurrence of dead space is reduced, and the disk device can be made thinner.

11 and 12 show a motor chassis 43 according to a modified example of the present invention. The motor chassis does not necessarily have to be configured to rotate with respect to the main chassis 8.
As shown in the figure, the motor chassis 43 may be held to be movable up and down with respect to the main chassis 8 by four springs 44a to 44d. Also, two shafts 45a to 45d are provided on each side of the motor chassis 43, two shafts 45a to 45d in total.
And rollers 46a and 46b (shaft 45
The rollers attached to c and 45d are provided with (not shown),
Further, by making the shape of the cam portion 47 formed on the cam plate 11 into the shape shown in FIG. 12, the motor chassis 43 is kept horizontal with respect to the main chassis 8 by the sliding operation of the cam plate 11 in the A ₁ and A ₂ directions. It is possible to move up and down while maintaining.

Further, the positioning with respect to the main chassis 8 when the motor chassis 43 is in the upward movement position is performed by the four positioning pins 48a to 48d provided on the motor chassis 43. At this time, as shown in FIGS. 13 (A) and 13 (B), the positioning pins 48a to 48d are screwed to the motor chassis 43, and the projecting dimension from the upper surface of the motor chassis 43 is changed by changing the screw advance degree. The height and the skew of the motor chassis 43 with respect to the main chassis 8 can be changed by making the adjustment possible. Further, the upper ends of the respective positioning pins 48a to 48d are made spherical, and the conical seat 49 is attached to the main chassis 8 which receives them.
It may be configured such that the positioning accuracy is improved by providing the.

As described above, according to the present invention, the motor chassis lifting mechanism lowers the turntable or the like when the disk cartridge is inserted in the horizontal direction to reduce the amount of protrusion from the main chassis, thereby making it closer to the upper surface of the disk cartridge. Even if the disc cartridge is inserted at the position, it does not interfere with the turntable or the like, so that the vertical movement dimension of the disc cartridge can be reduced, and thus the dead space is reduced and the disc device is made thin. It has features such as being able to.

[Brief description of drawings]

FIG. 1 is an enlarged view showing a motor chassis lifting mechanism of a disk device according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a main part of the disk device, and FIG. 3 is a rear view of a main chassis near an opening. FIG. 4 is an enlarged view of FIG. 4, FIG. 4 is a perspective view for explaining the cam plate, FIG. 5 is a perspective view for explaining the motor chassis, and FIG. 6 is the motor chassis in the upper moving position in FIG. The figure which shows the state which moved, FIG. 7 thru | or 1
FIG. 0 is a diagram for explaining the operation of the motor chassis in correspondence with the insertion operation of the disk cartridge, FIGS. 11 and 12 are diagrams showing a modified example of the present invention, and FIG. 13 is a motor using a positioning pin. FIG. 14 is a view for explaining a mechanism for adjusting the height position of the chassis with respect to the main chassis.
FIG. 15 and FIG. 15 are views for explaining an example of a conventional disk device. 7 ... Disk device, 8 ... Main chassis, 9 ... Pickup, 10 ... Disk holder elevating mechanism, 11 ... Cam plate, 12 ... Motor chassis elevating mechanism, 13, 15 ... Opening, 14 ... Turntable, 16, 17 ... Oblong hole , 22,
43 ... Motor chassis, 26, 27 ... Cam part, 28 ... Spindle motor, 29 ... Spindle shaft, 40 ... Disk cartridge.

Claims (1)

[Scope of utility model registration request] 1. A disk device configured so that a disk as a recording medium is placed on a turntable and rotated, and at least information recorded on the disk is read by a pickup, the disk containing the disk. A disc holder elevating mechanism for raising and lowering a disc holder into which a cartridge is inserted and mounted above the main chassis; and a motor chassis raising and lowering mechanism for raising and lowering a motor chassis to which a spindle motor for rotating the turntable is attached under the main chassis. A disk device having a structure.