JPH10125034A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the positioning accuracy of a cartridge and to improve a writing accuracy by matching a hole part provided on a shutter plate to a hole part for placement and positioning when the shutter plate is released. SOLUTION: A hole part H2 at the side of a cartridge A and a hole part Hs at the side of a shutter plate S are penetrated so that they match in terms of positioning and the hole part Hs at the side of the shutter S is penetrated so that it avoids a window part W at the upper right edge part of the shutter plate S and the rotary region of a disk D. Then, a positioning pin (shaft) is engaged to a disk drive device inside the hole part where the hole part H2 in matched state and the hole part Hs match and inside the other hole part H1 , thus positioning the disk cartridge A to a proper position. Even if the width of the window part that is required for a disk drive part and a scanning head drive part, and the release width of the shutter plate are set at least 1/3 of the width of the disk cartridge, the hole part for positioning the cartridge A does not be blocked, thus maintaining a writing accuracy for the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge for rotatably storing a digital information recording disk such as a compact disk.

[0002]

2. Description of the Related Art The capacity of recording disks for reading and writing has been dramatically increased. Especially, disks for recording in a digital system are liable to malfunction due to slight dust or scratches on the surface. Therefore, it is preferable to use a method in which the cartridge is mounted on a disk drive device (recording / reproducing device) while being housed in a cartridge.

[0003] There are various types of disk cartridges in which information recording disks such as conventional compact disks are rotatably stored, depending on the type of the disk.

The plan view of FIG. 7 and the left side view of FIG. 8 are provided with window portions W which are opened on both front and back sides of the cartridge A, and the cartridge A is, as shown in FIG. A plastic case in which side plates 2, 2, 2, 2 are integrally provided around a rectangular bottom plate 1 having an opening window portion W, in which a disk D (recording medium) is rotatably stored. I have. Then, a plastic rectangular lid plate 3 provided with a window portion W which is opened facing the case (provided with a side plate if necessary)
Is covered.

[0005] Generally, a linear guide rail R is provided on one side (side plate) of the cartridge A, and is held along the guide rail R, and each window on the front and back of the cartridge is provided. A U-shaped opening / closing shutter plate S (see FIG. 9) for opening and closing the portion W is provided, and the shutter plate S is constantly urged in the closing direction via a spring F. 4 is a shutter plate S
Is a guide for holding the leading end of the guide.

On the front surface, the back surface, or the front and back surfaces of the cartridge A, a disk rotation drive having a hole formed on the back surface or the front surface or penetrating both the front and back surfaces in a state of being interrupted as a discontinuous space from the internal space of the cartridge A It is provided with two or more holes H for cartridge mounting positioning with respect to the system (disk drive side).

For example, the holes H are formed as holes H ₁ , H ₂ , H ₃ , and H _{4 at} four corners of the disk cartridge A as shown in FIG. Each hole portion H ₁ shown in side view in FIG. _{8, H 2, H 3,} H
Reference numeral ₄ denotes a hole provided so as to penetrate both sides of the cartridge A.

The data writing operation or the data reading operation of the disk recording medium rotatably stored in the case of the disk cartridge A is performed by inserting the shutter plate S provided in the cartridge A when the disk cartridge is inserted into the driving device. The setting is made such that the slide operation is performed and the window portion W is opened before the operation is performed.

A driving apparatus for driving the disk D in the case of the cartridge A includes a disk drive unit M (hub) that rotates the disk D in the vicinity of a central hole of the disk D while fixing the disk at a predetermined accurate position. A driving head (not shown) such as a sensor for reading and writing data to and from the disk D;
It has.

The driving device has a tapered disk-like shape for chucking a rotating disk D such that the cartridge A is located near the center of the cartridge A in a state inserted into the driving device. A hub mechanism is provided, from which heads such as sensors and lasers are linearly moved toward the peripheral direction of the disk D.
The scanning head by the lens group moves.

The shapes of the window portion W and the shutter plate S of the disk cartridge A are set in accordance with the movement of the driving device for the disk D. For example, the shutter plate S is shown in FIGS. The shape is as shown in c).

It is particularly important that when the window portion W of the cartridge A is opened to perform operations such as writing and reading on the disk D, the shutter plate S is provided with at least the disk driving portion M and the scanning head driving portion of the driving device. A sufficiently large opening width is required depending on the size and the operation amount of the unit.

For example, as shown in FIG. 7, with respect to the width of the disk cartridge A, the required open width which does not hinder the disk drive M and the scanning head drive, that is, the width of the window W, and When the width and the opening width of the shutter plate S can be set to a sufficiently narrow width such as less than 1/3,
Can set the hole portion H for positioning the position of the sliding movement range of the disc cartridge A shutter plate S, the hole portions of H ₂ for positioning the cartridge A is closed by the opening operation the shutter plate S Absent.

However, the required opening width which does not hinder the disk drive unit M and the scanning head drive unit is, for example, close to one-third of the width of the cartridge A or larger than that. If, in the disc cartridge a, there is no margin portion can set a hole portion H for positioning, by the opening operation the shutter plate S to the hole portions of H ₂ for positioning the cartridge a will be blocked Become.

For this reason, the holes H ₃ and H ₄ are used. However, the holes H ₃ and H ₄ are provided with respect to the scanning head driving unit which moves toward the edge of the window W. to further than part H _2, positioning accuracy of the cartridge a is reduced, writing to the disc D, it causes lowering of the reading accuracy.

[0016]

According to the present invention, the width of the window W and the opening width of the shutter plate S required for the disk drive unit and the scanning head drive unit are reduced to 1/3 of the width of the disk cartridge A. Even if it is set to be larger, the opening for the positioning of the cartridge A, which is closer to the scanning head driving unit that moves toward the edge of the window W, is closed by the shutter plate S that has been opened. Therefore, it is an object of the present invention to maintain the positioning accuracy of the cartridge A and maintain the writing and reading accuracy with respect to the disk D.

[0017]

SUMMARY OF THE INVENTION The present invention, the shutter plate S is provided with a hole portion of H ₂ for mounting positioning at least one position the sliding direction of the linear guide rail R of the disk cartridge A, the shutter plate a hole portion H _S matched to the hole portion H ₂ upon opening of S is a disk cartridge, characterized in that provided on the shutter plate S.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk cartridge according to the present invention will be described in detail below with reference to an embodiment.
FIG. 2 is an overall plan view showing an embodiment of the disk cartridge of the present invention. FIG. 2 is a plan view showing an embodiment of the disk cartridge of the present invention in a state where the opening / closing shutter plate is opened and the window portion W is opened. FIG.

The disk cartridge A according to the present invention is a disk cartridge A for rotatably storing an information recording disk having holes H for mounting and positioning with respect to a drive system in at least two places.
A window portion W which is opened on both front and back sides of
A linear guide rail R provided on one side of the cartridge A, and a U-shaped opening / closing shutter plate S which is held along the guide rail R and linearly slides to open and close the respective window portions W; includes a hole portion of H ₂ at least the linear guide rail R side for mounting positioning the sliding direction one position of the shutter plate S, hole portions are aligned with the hole portion H ₂ upon opening of the shutter plate S H _S Are provided on the shutter plate S.

The disc cartridge of the present invention has a tray-shaped case composed of a rectangular bottom plate 1 and side plates 2, 2, 2, 2 provided integrally around the four sides thereof, and an upper opening of the tray-shaped case. And a cover plate 3 (provided with side plates as necessary; see FIG. 8).

Front and back of the disk cartridge A (bottom plate 1 and cover plate 3 of tray-like case facing each other)
Are provided with window portions W, W which are open to face each other.

A circular disk D (recording medium) is rotatably accommodated in the cartridge A. D
_O is a rotation center hole of the disk D, and is a drive rotation hub (rotary body) or a cartridge A on the disk drive device side.
The hub (rotating body) on the side is fitted.

On one side (side plate) of the cartridge A, a linear guide rail R is provided.
A U-shaped opening / closing shutter plate S for opening and closing the window portions W on the front and back of the cartridge so as to be slidable along the guide rail R by a distance L.
(See FIG. 9).

The bottom surface 1 of the tray-like case and the outer surface of the cover plate 3 are provided with holding guides 4 for slidably holding the leading end of the shutter plate S.

The window portion W of the cartridge A can be opened by sliding the shutter plate S in the opening direction along the linear guide rail R by an appropriate actuator operation of the disk drive device, and can be opened in the closing direction by the actuator operation. It can be closed by sliding.

In order to hold the shutter plate S in the closed state or the open state, the shutter plate S can be temporarily locked to the linear guide rail R. (Not shown) to the shutter plate S
And a linear guide rail R. In addition,
The locking mechanism by the concave-convex fitting includes a convex portion or a concave portion slightly projecting from the linear guide rail R, and a shutter plate S.
There is a mating with a concave portion or a slightly protruding convex portion provided in the above.

Alternatively, as shown in FIG. 7, the shutter plate S is constantly biased in the closing direction via a spring F, and slides in the opening direction by a suitable actuator operation of the disk drive device against the spring F. The window portion W may be opened by operating it, and may be slid in the closing direction by the repulsive force of the spring F by releasing the actuator operation.

A disc drive system (disc drive side) having a hole or penetrated on the front surface, the back surface, or both the front and back surfaces of the cartridge A as a space discontinuous from the internal space of the cartridge A is provided. hole portion H for the cartridge mounting position is provided at least two positions, for example, holes portions H ₁ to each four corners of the disc cartridge a, as shown in FIG. 7, H _2, H
_3, the hole is set as H _4. Incidentally, the hole portion H _1, H _2, H
₃ , The shape of H ₄ is not particularly limited, such as a circle, an ellipse, a long hole, and a square.

The data writing operation or the data reading operation on the disk recording medium rotatably stored in the case of the disk cartridge A is performed by opening and closing the shutter plate S provided on the cartridge A when the disk cartridge is inserted into the driving device. Is performed after the window portion W is opened by sliding operation.

The opening / closing shutter plate S of the disk cartridge A according to the present invention has a hole H _S or a notch S _C described later.
(See FIGS. 4 and 5).

The hole portion H _S is provided with a shutter plate S,
When the window W is completely opened from the closed position (the portion shown by the solid line) to the open position (the portion shown by the broken line), at least the shutter plate on the linear guide rail R side of the disc cartridge A is opened. to match the hole portion of H ₂ for mounting positioning provided in the sliding direction one position S, in which is provided so as not to cover the so-called holes portion H ₂ by the shutter plate S. In addition,
The shape of the hole H _S is not particularly limited, such as a circle, an ellipse, a long hole, or a square.

[0032] Incidentally, the shutter plate S sliding direction of the linear guide rail R of the disk cartridge A, if the hole portion of H ₂ for mounting positioning provided on two locations to more, the shutter plate S correspondingly at two positions or more locations, but each to match the hole portion H _2, the so-called respectively a hole portion H ₂ providing holes portion H _S so as not blocked by the shutter plate S.

When a notch S _C is provided in the opening / closing shutter plate S, the notch S _C is changed from a position when the shutter plate S is closed (a portion indicated by a solid line) to a position when the shutter plate S is opened (a portion indicated by a broken line). Go to, in the state where the window portion W is completely opened, aligned with the hole portions of H ₂ for mounting positioning provided in the sliding direction one position at least the linear guide rail R side of the shutter plate S of the disk cartridge a as so-called one in which to avoid hole portion H ₂ so as not to block the hole portion H ₂ by the shutter plate S is provided a notch S _C.

[0034] Incidentally, the shutter plate S sliding direction of the linear guide rail R of the disk cartridge A, if the hole portion of H ₂ for mounting positioning provided on two locations to more, the shutter plate S correspondingly at two positions or more positions, to match the hole portion H _2, so-called,
To avoid holes portion H ₂ so as not to block the hole portion H ₂ by the shutter plate S is intended to provide a notch S _C.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the disk cartridge of the present invention will be described below.

<Embodiment 1> FIG. 1 shows a hole H 1 for positioning as a hole H _{1 in the} upper right corner of the cartridge along the guide rail R side of the disk cartridge A body.
When the hole portion H ₂ provided at a location that contains about 1/4 inside the upper left of the cartridge angle corners, the opening and closing shutter plate S of more than 1/3 of the width with respect to the case width of the cartridge A, Ana設A hole H _S for avoiding the portion H ₂ is provided.

The shutter plate S can be slid along a linear guide rail R between a closed position indicated by a solid line and an open position indicated by a broken line.

[0038] The disc cartridge A includes a hole portion H ₁ provided in the upper right corner corners, at two positions of the hole portion H ₂ provided in a location that contains about 1/4 inside the upper left corner corner A hole H for positioning the cartridge is provided. Hole portion H ₁
The shape of oval, the shape hole portion H ₂ is circular, the shape of the hole portion H _S provided on the shutter plate S is circular.

When the disk cartridge A is inserted into the disk drive device and the shutter plate S is opened by the moving distance L by a predetermined actuator built in the device, as shown in FIG. Hole H
As the ₂ and the shutter plate S side of the hole portion H _S positionally aligned with each other, the hole portion H _S shutter plates S side of the window portion W and the disk D on the right upper end portion of the shutter plate S It is penetrated so as to avoid the rotation area.

[0040] Then, the aligned holes portion inside the hole portion H ₂ and hole portion H _S of the alignment, on the inside of the other hole portion H _1, given that furnished to the disk drive unit The positioning pins (shafts) are fitted to position the disk cartridge A at a normal position with respect to the disk drive unit and the scan head drive unit of the disk drive device.

<Embodiment 2> FIG. 3 shows a hole H 1 for positioning at the upper right corner of the cartridge along the guide rail R side of the disk cartridge A main body as a hole H _{1 for positioning.}
When, in which the hole portion H ₂ provided in the cartridge angle corner of the upper left.

The shutter plate S is slidable along a linear guide rail R between a closed position indicated by a solid line and an open position indicated by a broken line, similarly to the first embodiment. I have.

[0043] The disk cartridge A includes a hole portion H ₁ which is provided in the upper right angle corners, hole portion H provided in the upper left corner corners
₂ , two holes H for positioning the cartridge are provided. Hole portion H ₁ shape oval, the shape of the hole portion H ₂ is circular, hole portion H _S provided on the shutter plate S
Has a circular shape.

The insert the disk cartridge A in the disk drive apparatus, the cartridge A side of the hole portion H ₂ and shutter plate upon opening operation of the shutter plate S by the movement distance L at a predetermined actuators interior to the device The hole portion H _S on the shutter plate S side is provided with a rotation area of the window portion W and the disk D at the center upper end of the shutter plate S so as to be aligned with the hole portion H _S on the S side. It is penetrated to avoid it.

[0045] Then, in the same manner as in Example 1, in the aligned holes portion inside the hole portion H ₂ and hole portion H _S of the alignment, and the inside of the other hole portion H _1, A predetermined positioning pin (shaft) provided in the disk drive device is inserted into the disk drive device, and the disk cartridge A is positioned at a normal position with respect to the disk drive unit and the scan head drive unit of the disk drive device.

[0046] <Example 3> FIG. 4, as the hole portion H for positioning, along the guide rails R side of the disk cartridge A body hole portion H ₁ in the cartridge angle corner of the upper right
When the hole portion H ₂ provided in the cartridge angle corner of the upper left, the opening and closing shutter plate S of more than 1/3 of the width with respect to the case width of the cartridge A, notch for avoiding hole portion H ₂ S _C is provided.

The shutter plate S is slidable along a linear guide rail R by a moving distance L between a closed position shown by a solid line and an open position shown by a broken line in FIG.

[0048] The disc cartridge A includes a hole portion H ₁ provided in the upper right corner corners hole portion H provided on the upper left corner corner
₂ , two holes H for positioning the cartridge are provided. The shape of the hole portion H ₁ is circular, the shape of the hole portion H ₂ is elliptical.

The shutter plate shape of the notch S _C is that provided in S, as shown in FIG. 4, the top of the window portion W which opens into a shape along the outer circumference of the disc D in the form that can be sufficiently covered closed And linear guide rail R
When the shutter plate S is closed work position shown in dashed lines along, one that has a shape to avoid without covering the hole portion H _2, a part shape of the notch S _C, window portion W Are partially circular so as to cover the outer side of the upper circular portion. Note that the partial circular portion may be a straight line.

The insert the disk cartridge A in the disk drive apparatus, the cartridge A side of the hole portion H ₂ and shutter plate upon opening operation of the shutter plate S by the movement distance L at a predetermined actuators interior to the device the notch S _C of the S-side, so as to positionally aligned with each other, the cutout portions S _C of the shutter plate S side avoids the rotation region of the window portion W and the disk D in the central upper portion of the shutter plate S It is penetrated as follows.

[0051] Then, the inside of the hole portion H ₂ by matching the hole portion H ₂ and notch S _C of the alignment, on the inside of the other hole portion H _1, and furnished to the disk drive unit A predetermined positioning pin (shaft) is inserted to position the disk cartridge A at a normal position with respect to the disk drive unit and the scan head drive unit of the disk drive device.

[0052] <Example 4> FIG. 5 is a hole portion H for positioning, along the guide rails R side of the disk cartridge A body hole portion H ₁ in the cartridge angle corner of the upper right
When the hole portion H ₂ provided in the cartridge angle corner of the upper left, the opening and closing shutter plate S of about 1/3 of the width or less width with respect to the case width of the cartridge A, the hole portion H ₂ avoidance notch for is provided with a S _C.

The shutter plate S is slidable along a linear guide rail R by a moving distance L between a closed position indicated by a solid line and an open position indicated by a broken line in FIG.

[0054] The disc cartridge A, as in the above Example 3, the hole portion H ₁ provided in the upper right corner corners, at two positions of the hole portion H ₂ provided in the upper left corner corners cartridge A hole H for positioning is provided. The shape of the hole portion H ₁ is circular, the shape of the hole portion H ₂ is elliptical.

As shown in FIG. 5, the notch S _C provided in the shutter plate S has a shape capable of sufficiently covering and closing the upper portion of the window W that opens along the outer circumferential circle of the disk D. And linear guide rail R
When the shutter plate S is closed work position shown in dashed lines along, one that has a shape to avoid without covering the hole portion H _2, a part shape of the notch S _C, window portion W Are partially circular so as to cover the outer side of the upper circular portion. Note that the partial circular portion may be a straight line.

[0056] Also, the shutter plate S is provided with a projecting surface S _D at an end portion facing the cutout portion S _C of the shutter plate S, slid set as large as possible an area of the slide surface for the linear guide rail R The accuracy (linear mobility) is improved.

<Embodiment 5> FIG. 6 shows a hole H 1 for positioning at the upper right corner of the cartridge along the guide rail R side of the disk cartridge A as a hole H _{1 for positioning.}
When a hole portion H ₂ in the cartridge angle corner of the upper left, the hole portion H ₃ in the cartridge angle corner of the lower right, the hole portion H ₄ provided on the cartridge angle corner of the lower left, the cartridge A case A hole H _S for avoiding the hole H ₂ is provided on the opening / closing shutter plate S having a width of about 1/3 or less of the width.
Is provided.

The shutter plate S is slidable along a linear guide rail R by a moving distance L between a closed position shown by a solid line and an open position shown by a broken line in FIG.

[0059] The disk cartridge A includes a hole portion H ₁ which is provided in the upper right angle corners, hole portion H provided in the upper left corner corners
_2, a hole portion H ₃ in the lower right corner corners, the four portions between the hole portion H ₄ in the lower left corner corners hole portion H for cartridge positioning
Is provided. Hole portions H _1, each of circular shape, the hole portion H ₃ hole portion H _2, the shape of the hole portion H ₄ are each elliptical.

The shutter plate S is slidable along a linear guide rail R by a moving distance L between a closed position indicated by a solid line and an open position indicated by a broken line.

[0061] insert the disk cartridge A in the disk drive apparatus, the cartridge A side of the hole portion H ₂ and shutter plate upon opening operation of the shutter plate S by the movement distance L at a predetermined actuators interior to the device the hole portion H _S of S side, so as to positionally aligned with each other, the hole portion H _S shutter plates S side, the upper left end of the shutter plate S, the rotation region of the window portion W and disk D It is penetrated so as to avoid.

In the same manner as in the first and second embodiments, the inside of the hole portion where the hole portions H ₂ and H _S are aligned and the other hole portion H ₁ are aligned. Predetermined positioning pins (shafts) housed in the disk drive device are inserted into the inside and the other hole portions H ₃ and H ₄ respectively, and the disk cartridge A is inserted into the disk drive unit or the scan head drive unit of the disk drive device. To a normal position with respect to.

[0063]

According to the disk cartridge of the present invention, the width of the window and the opening width of the shutter plate required for the disk drive unit and the scanning head drive unit are set to about 1/3 of the width of the disk cartridge. Even if it is set to be larger or larger, it is formed along the guide rail side closer to the scanning head drive unit moving toward the edge of the window portion by the shutter plate that has been opened. The positioning hole of the cartridge A is not blocked, and the positioning accuracy of the cartridge can be maintained, so that the writing accuracy and the reading accuracy for the disk can be maintained.

[Brief description of the drawings]

FIG. 1 is an overall plan view showing an embodiment or Example 1 of a disk cartridge according to the present invention.

FIG. 2 is an overall plan view showing a state in which an open / close shutter plate is opened in the embodiment or Example 1 of the disk cartridge of the present invention.

FIG. 3 is an overall plan view showing a second embodiment of the disk cartridge of the present invention.

FIG. 4 is an overall plan view showing a third embodiment of the disk cartridge of the present invention.

FIG. 5 is an overall plan view showing a fourth embodiment of the disk cartridge of the present invention.

FIG. 6 is an overall plan view showing a fifth embodiment of the disk cartridge of the present invention.

FIG. 7 is an overall plan view of a conventional disk cartridge.

FIG. 8 is an overall side view of a conventional disk cartridge.

FIG. 9 is an overall perspective view of an opening / closing shutter plate used for the conventional or the present invention.

[Explanation of symbols]

A: disk cartridge D: disk recording medium F
... spring _{H, H 1, H 2,} H 3, H 4 ... hole portion H _S ... hole portion
L: Moving distance R: Guide rail S: Shutter plate S _C : Notch
W: Window part 1: Bottom plate 2: Side plate 3: Cover plate

Claims (1)

[Claims] [Claim 1, further comprising a hole portion of H ₂ for mounting positioning the shutter plate S in the linear guide rail R of the disk cartridge A is included in at least one position the sliding direction, the hole portion upon opening of the shutter plate S disc cartridge of the hole portion H _S matching in H _2, characterized in that provided on the shutter plate S.