JP3315751B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive capable of inserting disks of different standards such as a compact disk not stored in a cartridge and a mini disk stored in a cartridge from a common insertion hole.

[0002]

2. Description of the Related Art In recent years, compact disks for storing music data and the like as digital signals have become widespread. This compact disc has an outer diameter of 120 mm and a single compact disc with an outer diameter of 80 mm, except that the recorded data is reproduced by irradiation with laser light except for the outer diameter. Is similar. Recently, an information recording medium called a mini-disc having an even smaller outer diameter has been proposed. The mini disc and the compact disc have different outer diameters of the disc itself and are used in a state where the compact disc is not stored in the cartridge, whereas the mini disc is used in a state where the disc is stored in the cartridge. In that On the other hand, both types of disks have a common feature in that information recorded on both disks can be read out by irradiating a laser beam of approximately the same output.

FIG. 8 and FIG.
Shown in 8 is a top view showing a compact disc, FIGS. 9A and 9B are a top view and a side view showing a mini disc, and FIG. 10 is a sectional view of a disc D housed in the cartridge shown in FIG. is there. The compact disk CD shown in FIG. 8 has an outer diameter of 120 mm, and an inner diameter of the center hole 1 formed at the center is 15 mm. The data is a circle 1a having a diameter of 50 mm with respect to the center.
It is a standard that is recorded in an area outside the area. FIG.
In the mini-disc MD shown in FIG. 1, a disc D having an outer diameter of 64 mm shown in FIG. A center hole 3 having an inner diameter of 11 mm is formed at the center of the disk D, and a metal clamping plate 2 is mounted above a clamping area D1 centered on the center hole 3. In addition, this disc D has a standard in which data is recorded in an area outside a circle having a diameter of about 17 mm with respect to the center.

[0004]

When the above compact disk CD and mini disk MD are driven by a common disk device, it is necessary to insert both of these disks into the device. Only an insertion hole corresponding to the thickness of a compact disk CD or a single compact disk is formed, and it is not possible to insert a large-sized disk such as a mini-disc MD in which a disk D is housed in a cartridge CT. There was a problem. Further, if the insertion hole for inserting the mini-disc MD is formed separately from the insertion hole for the compact disk CD, these two insertion holes occupy a large occupied area in the decorative surface of the device, and the size of the device is reduced. There was a problem that it was difficult to convert.

[0005]

[0006]

[0007]

Accordingly, the present invention allows a disc housed in a cartridge and a disc of a different standard not housed in a cartridge to be inserted from a common insertion hole, thereby reducing the area occupied by the insertion hole in the decorative surface of the apparatus and thereby miniaturizing the apparatus. It is an object of the present invention to provide a disk device capable of achieving the following.

[0009]

The present invention SUMMARY OF THE INVENTION To achieve the above object, the nose attached to the device body, another
A disc having a different width dimension, a disk housed in a cartridge, the disc is not housed in a cartridge has opened insertion holes are commonly inserted, the <br/> insertion hole, the cartridge a first insertion portion housed disk is inserted, and a second insertion portion that disk which is not accommodated in the cartridge is inserted, said second insertion portion and the first insertion portion, Its opening width
And the thickness of the opening are different from each other,
Are formed continuously, and the opening width dimension of the insertion hole is
However, it is characterized in that it matches the opening width dimension of one insertion portion .

In the above configuration, the first insertion portion has a larger opening thickness dimension and a smaller opening width size than the second insertion portion, and the first insertion portion has a disk accommodated in the cartridge.
Is restricted in the width direction in the first insertion portion, and
It is preferable that it can be inserted into the device main body only from the insertion portion . In this case, the thickness of the opening of the first insertion portion
Contains the thickness of the opening of the second insertion portion.
Is preferred. The first insertion portion and the second insertion portion,
Preferably the centers of the opening width dimensions coincide with each other
No. For example, the first insertion portion and the second insertion portion
The centers of the opening width dimensions coincide with each other, and the first insertion
The insertion portion is formed in a thickness direction of the opening from one side of the second insertion portion.
It may be formed by expanding. Or the first insertion
The center of the opening width dimension of the insertion portion and the second insertion portion is mutually
Coincident with each other, and wherein the first insertion portion is connected to the second insertion portion.
It is formed by expanding in the thickness direction of the opening from both sides of the
May be. In the above invention, the inside of the device main body includes
At the position where the core is extended in the disk insertion direction,
Discs stored in cartridges and not stored in cartridges
There is a turntable on which a disc can be placed
Is preferred.

[0011]

In the above means, the disk accommodated in the cartridge and the disk not accommodated in the cartridge are inserted from the common insertion hole. The insertion hole is formed such that a first insertion portion into which a disc stored in the cartridge is inserted and a second insertion portion into which a disc not stored in the cartridge is inserted partially overlap in the thickness direction. Therefore, the area occupied by the nose, such as a decorative surface, can be reduced as compared with the case where the insertion holes for inserting the respective discs are separately formed, which contributes to downsizing of the apparatus.

The first insertion portion is formed to have a larger thickness and a smaller width than the second insertion portion, and it is possible to insert a disk stored in the cartridge only from the first insertion portion. In addition, if the insertion position in the width direction of the disk stored in the cartridge is regulated by the first insertion portion, the center of the turntable disposed in the apparatus and the disk stored in the cartridge can be adjusted. Can be easily matched with the center movement path, and the loading operation of the disk onto the turntable can be ensured.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the appearance of a disk device as one embodiment, FIG. 2 is a front view showing a disk insertion hole of the disk device shown in FIG. 1, and FIG. FIG. 4 is a side sectional view centering on the turntable shown in FIG. 3, and FIG. 5 is an exploded perspective view of the turntable attached to the motor shown in FIG. is there. The disk device 10 shown in FIG. 1 includes a device main body 13 and a nose 12 attached to the operation surface side of the device main body 13, and a decorative surface 12a of the nose 12 has various operation switches 12c and a display unit such as a liquid crystal. 12b and a single disc insertion hole 11
Are formed. A mini-disc MD as a disc stored in a cartridge in the disc insertion hole 11
Then, both compact discs CD as discs not stored in the cartridge are inserted in common.

As shown in FIG.
Is a first insertion section 1 for inserting a mini-disc MD.
1a and a second for inserting a compact disc CD
And the insertion portion 11b. 2nd insertion part 1
1b is set to a size capable of inserting a compact disc CD having a width W1 between both ends of 120 mm in outer diameter.
The thickness T1 of the opening is set so that the compact disc CD can be inserted. This second insertion portion 11
The first insertion portion 11a is formed at the center of the portion b. The first insertion portion 11a has an opening thickness T2 larger than the opening thickness T1 so that the cartridge of the mini disc MD can be loosely inserted.
Is formed in a range of a dimension W2 slightly larger than the width dimension of the cartridge. A disk drive unit 20 for rotating both disks CD and MD in common is provided on the inner side of the disk insertion hole 11 having such a shape, that is, inside the apparatus main body 13.

As shown in FIGS. 3 to 5, the disk drive unit 20 includes the compact disk CD and the mini disk M.
A turntable 30 for commonly rotating and driving the disk D in the disk D, and a motor 22 attached to a fixed portion 13a in the device body 13 for rotating and driving the turntable 30
And an optical pickup 23 such as a compact disc CD mounted on the turntable 30 that moves in the radial directions A1 and A2, and a turntable 3 as shown in FIG.
It has a clamper 21 that can move between a position (a) above and separated from the top (0) and a position (b) for clamping the compact disc CD on the turntable 30. The turntable 30 is a disc D in the mini disc MD.
And a second table 32 on which a compact disc CD is mounted.
Are commonly attached to the drive shaft 22a.

The first table 31 has a magnetic disk shape, and is fixed in a state where it is positioned on a stop ring 22b provided on the tip side (upper side in the figure) of the drive shaft 22a of the motor 22, and Table 31 always rotates integrally with the drive shaft 22a. A through-hole 31b into which the drive shaft 22a is inserted and fixed is formed at the center of the first table 31, and the shape of the upper surface 31a is such that it can be in close contact with the lower surface of the clamping plate 2 of the mini-disc MD shown in FIG. A recess 31c for accommodating the stop ring 22b is formed around the through hole 31b.

As shown in FIGS. 4 and 5, the second table 32 has a substantially disc-like shape in which a play insertion hole 32c rotatably inserted into the drive shaft 22a of the motor 22 is formed at the center. Things. On this upper surface side, a trapezoidal convex portion 32a inserted into the center hole 1 of the compact disc CD is formed around the play insertion hole 32c. A circular concave portion 32d centering on the play insertion hole 32c is formed on the upper surface of the convex portion 32a, and a low friction member 33 made of plastic or the like is adhered on the bottom portion 32e. The lower portion of the first table 31 enters the recess 32d, and the bottom surface of the first table 31 is in contact with the low friction member 33. On the outer peripheral portion of the convex portion 32a of the second table 32, a notch portion 32f for optical pickup and a notch portion for stop into which a stop member 13b provided on the fixed portion 13a is inserted on both sides of the play insertion hole 32c. 32 g are formed.

As shown in FIG. 3, the stop member 13b is disposed on the fixed portion 13a and on an extension of the moving path of the optical pickup 23. Then, by a driving unit (not shown) arranged below the fixed unit 13a, the stop member 13b is separated from the position below the second table 32 indicated by (e) in FIG. Is moved to and from the position inserted into the stop notch 32g. When the stop member 13b is inserted into the stop notch 32g, the second table 32 is in a locked state. At this time, the optical pickup notch 32f moves the condensing lens 23a of the optical pickup 23 as shown in FIG. Will be located above. When the optical pickup 23 moves to the data reading position (C) on the innermost peripheral side of the mini-disc MD as shown in FIG. The laser light emitted from 23a toward the mini-disc MD is formed to pass therethrough.

That is, as described above, the data area of the compact disc CD starts from a position having a diameter of 50 mm centered on the center hole. Therefore, when reading the data written on the compact disc CD, the optical pickup 23 can be read from the first data on the innermost peripheral side of the data area by moving it to the read position shown in FIG. Can be. On the other hand, mini disk M
The data area of the disk D in D starts at a position with an inner diameter of 17 mm centered on the center hole 3. Therefore,
When reading from the first data in the data area of the disk D, it is necessary to further move the optical pickup 23 to the center hole side to the position indicated by (c) in FIG. Here, in the above turntable, even when the optical pickup 23 moves to the position shown in (c), the laser light to be irradiated comes to face the notch 32f for the optical pickup and is blocked by the table. Never.

As shown in FIGS. 4 and 5, a compression spring 34 is disposed below the second table 32. The lower end of the compression spring 34 is a stop ring 2 attached to the drive shaft 22a.
2c is in contact with the upper surface. On the lower surface of the second table 32, a spring recess 32 is formed around a play insertion hole 32c.
h is formed, and the compression spring 34 is stored in a compressed state.

When the first and second tables 31 and 32 having the above-described structure, the low friction member 33 and the compression spring 34 are assembled to the drive shaft 22a of the motor 22, the first force is generated by the elastic force of the compression spring 34. Table 31 and second table 32 are elastically pressed against each other via low friction member 33. In this state, when the first table 31 fixed to the drive shaft 22a is driven, the second table 32 is rotated by transmitting the driving force of the drive shaft 22c via the low friction member 33. Become. When the second table 32 is locked by the stop member 13b, the first table 31 and the second table 32 are
Of the drive shaft 22 slips at a low load.
Only the first table 31 fixed to a is driven to rotate.

As shown in FIG. 4, the clamper 21 has a bottomed cylindrical shape with an open end facing the turntable 30, and is rotatably supported on a clamp shaft 21a. The internal depth dimension α of the cylindrical portion of the clamper 21 is formed so as not to come into contact with the first table 31 when it moves to the clamp position shown in (b). The clamper 21 is provided on the second
When the compact disk CD is placed on the table 32, the upper surface of the compact disk CD is directly elastically pressed. Also, when the mini-disc MD is loaded, the clamper 21 descends. At this time, the clamper 21 elastically presses against the upper surface of the cartridge CT and functions as a pressing member for the cartridge CT.

The operation of the disk device having the above structure will be described. As shown in FIGS. 1 and 2, the nose 12 is formed with a disc insertion hole 11 into which a mini disc MD and a compact disc CD can be inserted in common. The first insertion portion 11a of the disc insertion hole 11
In the thickness direction (upper side in the figure), the second insertion portion 11
b partially overlaps. That is, as shown by the two-dot chain line in FIG. 2, the opening thickness dimension T2 of the first insertion portion 11a is set such that the insertion area of the mini disc MD partially overlaps the insertion area of the compact disc CD. Therefore, the occupied area occupied by the insertion hole 11 in the decorative surface 12a of the nose 12 can be reduced as compared with a case where the insertion holes for inserting each disk are separately formed, contributing to miniaturization of the nose 12 and the entire device. can do. Moreover, when the mini-disc MD is inserted, the first insertion portion 11a formed in the center portion of the disc insertion hole 11 is utilized by utilizing the difference between the thickness of the cartridge CT and the thickness of the compact disc CD. The insertion operation can be performed only through the interface. Thus, when the mini-disc MD is inserted through the first insertion portion 11a, the position of the cartridge CT of the mini-disc MD in the width direction (horizontal direction in the drawing) is restricted by both side edges of the first insertion portion 11a. The center of the turntable 30 always coincides with the movement path of the center hole 3 of the disk D in the cartridge CT, and a reliable loading operation can be performed.

As shown in FIG.
Is loaded on the second table 32, the clamper 21 located at the position shown in FIG.
Is moved to the clamp position indicated by. As a result, the compact disk CD placed on the second table 32 is elastically sandwiched by the clamper 21 and is clamped by the magnetic attraction between the second table and the clamper 21. At this time, the stop member 13 provided on the fixing portion 13a
b has moved to the position indicated by (e) in FIG. 4, and the second table 32 is in the unlocked state. When the motor 22 is rotationally driven, the driving force is transmitted to the second table 32 via the first table 31 and the low friction member 33, and the compact disk CD clamped on the table 32 is rotationally driven. Is done. Then, the optical pickup 23 moving to the position indicated by (d) in FIG. 4 performs tracking movement to the outer peripheral side, and data is read from the data area on the innermost peripheral side of the compact disc CD.

On the other hand, when the mini disc MD is inserted through the disc insertion hole 11, the disc D in the cartridge CT is loaded on the first table 31, and the clamping plate 2 is placed on the table 31 as shown in FIG. Magnetically attracted and clamped. When the mini-disc MD is inserted, the stop member 13b is driven to move upward to move to the position indicated by (f) in FIG.
Is inserted into. As a result, the second table 32 is locked. In this state, the drive shaft 22a is driven by the motor 22.
Is driven, the first table 31 slips due to the low friction member 33, only the first table 31 fixed to the drive shaft 22a rotates, and the disk D is rotationally driven.

At this time, as shown in FIG. 3, the notch 32f for the optical pickup is located on the movement path of the condenser lens 23a of the optical pickup 23, and the shutter is opened by the notch 32f and the cartridge CT. The laser beam can be irradiated on the disk D through the window thus set. Therefore, when reading the data on the innermost peripheral side of the disk D of the mini disk MD, the optical pickup 23 is moved to the position shown in FIG.
Also, when moving to the position indicated by (c), the outer peripheral portion of the second table 32 is not hit or the laser beam is not blocked. Thus, data recorded on the mini-disc MD can be read. Also, when the mini-disc MD is loaded, as shown in FIG.
Is in a state of elastically contacting the upper surface of the. Thus, when the mini-disc MD is inserted, the cartridge CT is pressed downward by the clamper 21 and the cartridge C is pressed.
T can be stably positioned.

In the above embodiment, the turntable 3
0 notch 32 formed in the second table 32
The second table 32 is locked by fitting the stop member 13b to the stop member 13b.
, The second table 32 can be locked by the optical pickup 23. In this case, when the optical pickup 23 scans the recording area of the disc D of the mini disc MD, the optical cylinder holding the condenser lens 23a of the optical pickup 23 or the locking projection provided on the optical pickup 23 is used. What is necessary is just to fit into the notch 32f for optical pickups of the 2nd table 32.

The disk insertion hole may have a shape as shown in FIG. Disc insertion hole 4 shown in FIG.
0 is a first insertion section 4 for inserting the mini-disc MD.
1 has a shape in which the center portion of a second insertion portion 42 for a compact disk CD is opened on both upper and lower sides. Furthermore, in addition to the disk insertion holes 11 and 40, an insertion hole 43 for the illustrated cassette tape is separately formed on the decorative surface of the nose,
A drive unit for the magnetic tape may be provided on the back side. This makes it possible to reproduce data recorded on the magnetic tape or to record data, in addition to the operation of reproducing data from each disk.

In the above embodiment, the clamper is moved down not only when the compact disc CD is mounted on the turntable but also when the mini disc MD is mounted. When the operation is performed, the clamp operation may not be performed.
In addition, data may be written to the disc D such as the mini disc MD, in addition to the reproduction. The insertion hole 11 of the disk device shown in FIGS.
Is not limited to a compact disc having an outer diameter of 120 mm, and it is also possible to insert a single compact disc having an outer diameter of 80 mm.

[0030]

According to the disk device of the present invention, a disk housed in a cartridge and a disk of a different standard not housed in a cartridge can be inserted from a common insertion hole, and the area occupied by the insertion hole on a decorative surface or the like is reduced. In addition, the size of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a disk device as one embodiment.

FIG. 2 is an exemplary front view showing an insertion hole of the disk device shown in FIG. 1;

FIG. 3 is a top view showing a structure centered on a turntable inside the disk device shown in FIG. 1;

FIG. 4 is a side sectional view of the turntable shown in FIG. 3;

FIG. 5 is an exploded perspective view of the turntable shown in FIG. 4;

FIG. 6 is an explanatory diagram showing an operation state when a mini disc is placed on a turntable.

FIG. 7 is a front view showing a modification of the insertion hole of the disc.

FIG. 8 is a top view showing a compact disc.

9A is a top view showing a mini-disc, and FIG. 9B is a side view.

FIG. 10 is a sectional view of the disc housed inside the cartridge of the mini disc shown in FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Disk device 11, 40 Insertion hole 11a, 41 1st insertion part 11b, 42 2nd insertion part 12 Nose 12a Decorative surface 13 Equipment main body 13b Stop member 21 Clamper 22 Motor 22a Drive shaft 23 Optical pickup 30 Turntable 31 No. 1st table 32 2nd table 32f Notch for optical pickup 32g Notch for stop 33 Low friction member

Continuation of the front page (72) Inventor Shoji Suzuki 1-18 Nishi Gotanda, Shinagawa-ku, Tokyo Alpine Co., Ltd. (72) Inventor Kuri Kawamura 1-1-8 Nishi Gotanda, Shinagawa-ku, Tokyo Alpine Co., Ltd. (72) Inventor Kenji Imai 1-8-1, Nishigotanda, Shinagawa-ku, Tokyo Alpine Co., Ltd. (56) References JP-A-5-303862 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G11B 25/04 101 G11B 19/20

Claims (7)

(57) [Claims] To 1. A nose that is attached to the device body, each other
A disk width is different to have a disk housed in a cartridge, the disc is not housed in a cartridge has opened is commonly inserted as the insertion hole, the insertion hole is housed in the cartridge a first insertion portion disk is inserted, the disc is not housed in the cartridge and a second insertion portion to be inserted, said second insertion portion and the first insertion portion, the opening width Dimension
Method and opening thickness are different from each other.
The insertion portion is formed continuously, and the opening width dimension of the insertion hole is
A disc device characterized by the fact that the length of the disc device matches the width of the opening of one of the insertion portions . 2. The first insertion section has a larger opening thickness dimension and a smaller opening width dimension than the second insertion section , and the disc housed in the cartridge includes the first insertion section.
Is restricted in the width direction within the insertion portion and only from the first insertion portion.
2. The disk device according to claim 1, wherein the disk device can be inserted into an apparatus main body . 3. The method according to claim 1, wherein the first insertion portion has a thickness within an opening thickness.
3. The method according to claim 2, wherein an opening thickness of the second insertion portion is included.
Disk device. 4. The first insertion portion and the second insertion portion
Wherein the centers of the opening width dimensions coincide with each other.
The disk device according to any one of the chairs 3. 5. The first insertion portion and the second insertion portion
Are such that the centers of the opening width dimensions coincide with each other, and the first
The insertion portion has an opening thickness from one side of the second insertion portion.
4. The structure according to claim 2, wherein the opening is formed so as to expand in the direction.
Disk device. 6. The first insertion portion and the second insertion portion
Are such that the centers of the opening width dimensions coincide with each other, and the first
Are inserted from both sides of the second insertion portion.
4. The method according to claim 2, wherein the opening is formed so as to expand in a thickness direction.
Mounted disk device. 7. The apparatus according to claim 7, wherein the center is disposed inside the main body.
Inserted into the cartridge at the position extended in the insertion direction.
Disc and the cartridge Disk and
Is equipped with a turntable that can be placed together
Item 7. The disk device according to any one of Items 4 to 6.