JPH02193377A - Disk cartridge and its driver - Google Patents

Abstract

PURPOSE:To miniaturize the cartridge by forming a recessed part to a side end of loading side of a disk cartridge. CONSTITUTION:A shutter 3 at a closing position is gradually slid to open an opening part 9 while a shutter drive arm is being turned against an energizing force of a spring attended with the loading of a disk cartridge 1. When the cartridge 1 is loaded to a driver and a disk 4 is set to a turntable, an optical head is moved to an object track by a seek instruction from an external device. When the recording track in the innermost circumference is accessed, the interference of the cartridge 1 of a lever of a magnetic head mechanism section onto the case 2 is prevented by a recessed part 8 formed to the case 2 and the length of the fix arm is decreased to reduce the moving distance of the optical head. Thus, the driver is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge containing a recording medium such as a magnetic disk, an optical disk, and a magneto-optical disk, and a drive device for the disk cartridge.

[Conventional technology]

FIG. 13 is a perspective view showing the external shape of a conventional disk cartridge for a magneto-optical disk. In the figure, l is 130
This is a cartridge that stores a disc-shaped recordable disc 4 having a diameter of 11,111 mm inside it, and is inserted into an insertion slot of a disc drive device (not shown) with the direction indicated by the arrow as the insertion direction. The case 2 made of hard plastic has a flat box shape with a thickness of about 111IIIll and a length and width of about 135 mm x 153 mm, and a rectangular opening 9 including a notch arc in the center is formed on both sides of the cartridge 1 insertion side. has been done. This opening 9 is for access by a magnetic head or an optical head, and its width and length are such that the magnetic head or optical head can access all recording tracks of the disk 4.

In addition, the cartridge L has a shutter 3 made of SuS thin plate that closes the opening 9 of the case 2 when not in use, such as when the cartridge is taken out from the drive device described later, and has a U-shaped side surface. It is installed so that both sides are sandwiched from the side.

The shutter 3 is movable between a position where the opening 9 is closed and a position where it is opened, and is always urged to the closed position by a spring (not shown). In the movement range of the shutter 3 on the surface of the case 2, there is a shutter slide part 2a that is recessed larger than the thickness of the shutter 3 compared to other parts.
is formed, and both ends of the shutter 3 are connected to the shutter slide portion 2.
It is inserted into the gap of a guide part 3a made of a thin SUS plate which is fixed to the case 2 with a gap therebetween over the entire width of the guide part 3a.

FIG. 14 is a sectional view showing the configuration of a conventional magneto-optical disk drive device that drives a disk cartridge.

In the figure, 16 is a housing of this device, and the housing 16 is formed by fixing or screwing a metal mounting chassis to a hollow rectangular parallelepiped made of resin. A base 17 of the optical head 10 is attached to the bottom of the housing 16, as well as a motor 18 for rotating the disk four times. The base 17 is made of a flat plate-like member with an abbreviated cross section, and there is a drive (not shown) including a linear motor or a stepping motor for moving the optical head 10 in the radial direction of the disk 4 indicated by the arrow A. Means are provided.

The motor 18 is mounted with its rotating shaft protruding upward,
A turntable 1 has a disk 4 attached to its rotating shaft.
9 is fitted.

The optical head IO is composed of elements such as a semiconductor laser as a light source, various optical systems, and a photodetector, and irradiates a light spot of a predetermined diameter onto one surface of the disk 4 from one end of its upper surface to record, reproduce, and record information. Perform erasing.

Further, one end of a mounting frame 12 having a U-shaped cross section that straddles the disk 4 is attached to the other end side, and a mounting arm 2 made of a leaf spring of the magnetic head 11 is attached to the other end of the mounting frame 12.
The base of the disc 6 is attached so as to be movable up and down in the direction of approach and separation of the disk 4 shown by arrow B by means of a lifting means (not shown). The length of the mounting arm 26 is the length that allows a head section 11a (described later) to access the innermost recording track from the end of the case 2, plus a margin, and a slider section 11b is attached to the tip of the mounting arm 26. It is attached and floats due to the wind pressure generated by the rotation of the disk 4. Further, a head section 11a consisting of a core and a coil for applying a magnetic field to the disk 4 is attached at a position of the slider section 11b facing the optical spot position of the optical radar 10.

Next, the operation of the conventional disk cartridge and drive device configured as described above will be explained.

When the disk cartridge 1 is inserted into the insertion slot (not shown) of the drive device with the shutter 3 first, the tip of the shutter rotation arm (not shown) provided in the drive device will be inserted into the shutter 3.
As the disc cartridge 1 is inserted, the shutter rotating arm rotates against the biasing force of the spring, gradually sliding the shutter 3 in the closed position to open the opening 9. At this time, the optical head 10 is retracted together with the magnetic head 11 to the retracted position shown by the two-dot chain line in FIG. 14, and the mounting arm 26 is raised to avoid the front edge 2b of the case 2.

Next, when a seek command is given to the drive device from an external device such as a CPU (not shown), the optical helad 10 moves the magnetic head 1
1 and is advanced from the retracted position by a driving means to access a desired track. At this time, the mounting arm 26
is lowered when the slider portion 11b exceeds the front edge portion 2b.

As shown in FIG. 14, the depth of the recess in the mounting frame 12 is such that even when the optical head 10 accesses the innermost track of the disk 4, the mounting frame 12 does not touch the front edge 2b of the case 2. It is designed to avoid interference, and the moving distance of the optical head 10 is the length of the mounting arm 26 plus an allowance.
That is, the position is from the position where the head portion 11a accesses the innermost circumference to the retracted position where the slider portion 11b of the magnetic head 11 is removed from the case 2.

[Problem to be solved by the invention]

Drive devices configured in this manner are often mounted on the main bodies of computers such as workstations, and are constantly required to be smaller and thinner.

In conventional disk cartridges and their drive devices, the optical head and magnetic head are interlocked and connected, and it is important to reduce the space in which the optical head moves by shortening the distance it moves. It is.

However, in conventional drive devices, the length of the mounting arm and the moving distance of the head are determined by the distance from the innermost track position of the disk to the side edge of the case, making it difficult to downsize.

Another possible means of downsizing is to provide means for driving the magnetic head and optical head separately.
In this case, there are problems in that the number of driving means increases and that the two heads must be moved in synchronization, making the control complicated.

This invention was made in consideration of the above circumstances, and a recess is formed at the leading end of the insertion side of the disk cartridge so that when the head accesses the innermost recording track, the optical head and the magnetic head The mounting frame, which is the connecting part between the magnetic head and The purpose is to further shorten the moving distance by retracting and retracting the drive device, thereby making the drive device more compact.

[Means to solve the problem]

The disk cartridge according to the present invention has a recessed part having a width wider than the dimension in the direction intersecting the moving direction of the head and narrower than the width of the opening, at the side end part continuous with the opening of the case in which the opening is formed. The drive device engages a U-shaped frame that straddles the disk and a head arm extending from one end of the frame so that the head arm can move forward and backward. The head arm is moved forward and backward relative to the frame according to the moving direction of the frame.

[Action]

In the disk cartridge of the present invention, the rising portion of the U-shaped frame for attaching the head enters the recess formed at the side end of the disk cartridge, thereby reducing the distance the frame moves in the radial direction of the disk. In the disk drive device, the frame and the head arm are movable back and forth, and the moving distance is shortened by moving the head arm back and forth with respect to the frame in accordance with the moving direction of the frame.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment thereof.

FIG. 1 is a perspective view showing the outer shape of a magneto-optical disk cartridge, which is a disk cartridge according to the present invention. In the figure, reference numeral 1 denotes a cartridge in which a recordable disk 4 having a diameter of 130 mm is rotatably stored, and is inserted into an insertion slot of a disk drive device (not shown) with the direction indicated by the arrow as the insertion direction. The hard plastic case 2 is approximately 11 mm thick and approximately 130 mm in length and width.
It has the shape of a flat box of anX153 man, and rectangular openings 9 including a notch inner arc portion at the center are formed on both sides of the cartridge 1 insertion side. This opening 9 is for access by a magnetic head or an optical head, and its width and length are large enough to allow the magnetic head or optical head to access all recording tracks of the disk 4.

A recess 8 having the same length as the width of the opening 9 and an appropriate depth is formed at the insertion side end of the case 2 .

A crosspiece 7 is formed between the opening 9 and the recess 8.

The crosspiece 7 is for reinforcing the case 2, and its thickness is slightly thinner than that of the disk 4, making it unnecessary to raise and lower the magnetic head 11, which will be described later. Further, a groove 6 for guiding a shutter 3, which will be described later, is formed in the entire length in the longitudinal direction of the center of the upper surface of the crosspiece 7 and in the upper surface of the case 2 extending therefrom. The length of this groove 6 is slightly longer than the stroke of the shutter 3.

Further, the cartridge 1 has a shutter 3 made of a SuS thin plate on its side surface, which closes the opening 9 of the case 2 and protects the stored disc 4 when the cartridge 1 is not in use, such as when the cartridge 1 is taken out from a disc drive device, which will be described later. It has a U-shape and is attached to both sides of the case 2 from the insertion side. The shaft 3 is movable between a position where the opening 9 is closed and a position where it is opened, and is normally biased to the closed position by a spring (not shown) (however, it is shown in the open position in Figure 1). ). At a position facing the groove 6 of the shutter 3, there is a guide piece 5 that engages with the groove 6 described above.
It is formed by bending a part of it into an L shape, and guides the shutter 3 when the shutter 3 moves.

Further, in the movement range of the shutter 3 on the surface of the case 2, a shutter slide portion 2a is formed which is recessed larger than the plate thickness of the shutter 3 compared to other parts, and both ends of the U-shape of the shutter 3 are formed in the shutter slide portion. Case 2 over the entire width of 2a
It is inserted into the gap of the guide part 3a made of a thin SUS plate fixed to the guide part 3a with a gap between the guide part 3a and the guide part 3a.

2 is a plan view of the vicinity of the head of a drive device for a magneto-optical disk, which is a disk drive device according to the present invention; FIG. 3 is a side view thereof; FIG. 4 is an enlarged plan view of the magnetic head mechanism; Figure 5 is a side view thereof. In FIGS. 2 and 3, the optical head 10 is positioned on the innermost recording track of the disk 4. In FIGS.

In the figure, reference numeral 16 denotes a housing of this device, and the housing 16 is formed by fixing or screwing a metal mounting chassis to a hollow rectangular parallelepiped made of hard resin. A base 17 of the optical head 10 is attached to the bottom of the housing 16, as well as a motor 18 for rotating the disk four times. The base 17 is made of a flat plate-shaped member with an oval-shaped cross section, and is provided with a driving means (not shown) such as a linear motor or a stepping motor that moves the optical head 10 in the radial direction of the disk 4 as indicated by the arrow A. It is being

The motor 18 is mounted with its rotating shaft protruding upward,
A turntable 19 to which the disk 4 is attached is fitted onto the rotating shaft.

The optical head 10 is composed of elements such as a semiconductor laser as a light source, various optical systems, and a photodetector, and a light spot 10a converged to a predetermined diameter by an objective lens (not shown) disposed at one end of its upper surface is directed onto a disk 4. Records, reproduces, and erases information by irradiating one side of it.

Further, one end of a mounting frame 12 having a U-shaped cross section and spanning the disk 4 is attached to the other end side.

A groove 31 is formed on the upper side of the mounting frame 12 and extends through the entire length of the mounting frame 12 in the longitudinal direction.
A mounting base 13 is fastened to the other end of 2.

The mounting base 13 has a rectangular shape, and its length in the longitudinal direction is the same as the width of the mounting frame 12. A rectangular hole of a predetermined length is formed in the center of the lower part of the side surface, and springs 15a, which will be described later, are provided at both ends of the rectangular hole. The spring mounting bracket for attaching 15b is fixed. A slide base 27 having the same width as the mounting frame 12 is attached to the upper side of the mounting frame 12 so as to be slidable relative to the mounting frame 12 . Two flat guide portions are provided on both sides of one end of the slide base 27 in the width direction with a predetermined gap, respectively, so as to project downward so as to surround both sides of the mounting frame 12. Spring fittings having the same shape are fixed to the positions on both sides of one of the guide parts facing the spring fitting fixed to the mounting base 13, and springs 15a and 15b are attached between both spring fittings. , biasing the slide base 27 in the direction of contraction of the springs 15a, 15b.

A guide block 29 is fastened to the widthwise center of the slide base 27 through a groove 31 with two screws 30a and 30b. The guide block 29 consists of a bottom plate that is convex in plan view, and a rectangular flat block that extends one end to the symmetry axis of the bottom plate and has the same size as the longitudinal length of the slide base 27, and the thickness of the block is as follows. The width is approximately the same as the width of the groove 31. Further, two positioning poles 28a and 28b are provided on the upper surface of the mounting frame 12 so as to be partially exposed from the upper surface, and are urged upward by a spring.The positioning poles 28a and 28b are formed on the lower surface of the slide base 27. The slide base 27 is positioned by engaging with the hollow of the broken sphere. Mounting frame 1
A boss having a through hole in the width direction is fixed to the base of the lower surface of the lever 2, and two levers 14a and 14b are attached to a rotating shaft pivotally supported by the boss. lever 14a,
14b has a flat steel shape, and one end thereof is bent into a dogleg shape. Pins 14c and 14d are implanted at the other end. Pins 14c and 14d are slide base 2
The slide base is engaged so as to slide up and down in the gap between the guide portions on each side of the slide base 7, and by rotation of the levers 14a and 14h, the slide base can slide forward and backward with respect to the mounting frame 12. .

Further, one end of a mounting arm 26 for mounting a magnetic head 11 that applies a magnetic field onto the disk 4 facing the optical spot is fastened to the bottom plate of the guide block 29. The mounting arm 26 is made of a tapered plate spring material, and is inserted through the rectangular hole of the mounting base 13 and protrudes.

A rectangular flat slider portion 11b constituting the magnetic head 11 is attached to the other end, and is floated by the wind pressure generated by the rotation of the disk 4. Further, a head section 11a consisting of a core and a coil for applying a magnetic field onto the disk 4 is attached at a position facing the optical spot of the slider section itb.

Furthermore, stoppers 16a and 16b are fixed to the inner side of the housing 16 at positions facing the levers 14a and 14b, and stoppers 16a and 16b are fixed to the positions facing the levers 14a and 14b. ), the lever 14a.

One end of 14b comes into contact with stoppers 16a and 16h.

The above mounting frame 12, slide base 27, mounting arm 26, mounting stand 13, guide block 29, lever 1
4a, 14b, springs 15a, 15b, and positioning balls 28a, 28b, the magnetic head mechanism section 3
2 is configured.

Next, the operation of the disk cartridge and drive device configured as described above will be explained.

When the disk cartridge 1 is inserted into the insertion slot (not shown) of the drive device with the shutter 3 first, the tip of the shutter rotation arm (not shown) provided in the drive device will be inserted into the insertion slot (not shown) of the drive device.
The shutter rotating arm contacts the tip and rotates against the urging force of the spring as the disk cartridge 1 is inserted, gradually sliding the shutter 3 in the closed position to open the opening 9. . At this time, optical head 1
0 has been retracted to the retracted position shown in FIG.

6th. FIG. 7 is a plan view and a side view showing a state in which the optical head 10 is at a position slightly retracted from the outermost recording track and the lever is in contact with a stopper, and FIGS. FIG. 3 is a plan view and a side view showing a state where the vehicle is stopped at a retracted position.

When the disk cartridge is inserted into the drive device and the disk 4 is set on the turntable 19, the drive device moves the optical head 10 to a target track in response to a seek command from an external device.

In this case, as shown in FIGS. 2 and 3, when accessing the innermost recording track, the recess 8 formed in the case 2 causes the lever 14a of the magnetic head mechanism section 32 to be moved.

Interference with the case 2 of the disk cartridge 14b can be prevented, the length of the mounting arm can be shortened, and the moving distance of the optical head 10 can be reduced.

When the access to the target track is completed, the optical head 10 retreats and the lever 14a is moved as shown in FIGS. 6 and 7.

14b is connected to stoppers 16a and 16b. Lever 14a.

When one end of the lever 14b comes into contact with the lever 14b, the lever 14a, 14b rotates clockwise around the rotation axis in accordance with the retreat of the optical head 10, and the slide base 27 is moved by the spring 15a, 1
The magnetic head 11 is slid in the direction away from the mounting base 13 against the tension of the optical head 10. −
move further back. As shown in FIG. 8.9, in the retracted position, the levers 14a and 14b are substantially vertical, and the slide base 27 and the mounting base 13 are farthest apart.

Conversely, when the optical head 10 moves forward, the lever 14a
, 14b rotates counterclockwise, and the slide base 27
approaches the mounting base 13 by springs 15a and 15b, and the optical spot and magnetic head 11 face each other at the position shown in FIG. 6.7.

Through these operations, the moving distance of the optical head 10 can be further reduced, and the drive device can be downsized.

Next, other embodiments of the invention will be described.

FIG. 10 is a plan view of a disk cartridge of another embodiment, FIG. 11 is a plan view showing the structure of a drive device of another embodiment, and FIG. 12 is a side view thereof.

The differences between this embodiment and the first embodiment are as follows.

That is, in the first embodiment, the mounting arm 26 slid back and forth together with the slide base 27 and was retracted from the disk cartridge 1, but in this embodiment, the mounting arm 26 rotates on a substantially horizontal plane and is retracted from the disk cartridge 1. Evacuate from.

The disk cartridge and drive device will be explained below, focusing on the differences.

A shutter slide portion 2a is formed in the case 2 of the disk cartridge and is recessed over the movement range of the shutter 3. Moreover, the crosspiece 7 facing the recess 8 is even thicker, and its thickness is slightly thinner than the thickness of the disk 4. Further, a fan-shaped depression 2c is formed adjacent to the mounting arm 26 to prevent interference with the case 2 when the mounting arm 26, which will be described later, rotates.

The shutter 3 is formed so that one end of its U-shaped base engages with the sector-shaped recess.

On the other hand, as shown in FIG. 11.12, a horizontal gap is formed on the upper side of the mounting arm 12 on the U-shaped side surface, and a rotating frame 27 is inserted into the gap. It is rotatable in a horizontal plane by a shaft 28. A mounting arm 26 is fastened to one end of the rotating frame 27, and a protruding receiving portion that comes into contact with a stopper 33, which will be described later, is provided on the negative side of the mounting arm 26. Further, one end of a spring 15 is attached to the other end. Spring 15
The other end is attached to the mounting frame 12, and the mounting arm 2
6 in the counterclockwise direction. Further, a round bar-shaped stopper 33 is installed on the inner upper surface of the housing 16.

Next, the operation will be explained.

However, since the operation of the disk cartridge 1 is the same as that in the first embodiment, the explanation will be omitted.

In FIG. 11, the solid line indicates the position where the optical head 10 accesses the innermost recording track of the disk 4, the dashed line indicates the position where the receiving part of the rotating frame 27 abuts against the stopper 33, and the dashed-two dotted line indicates the position where the optical head 10 accesses the recording track on the innermost circumference of the disk 4. The respective positions are shown when moved to the retracted position.

In this embodiment, as shown by the solid line, even when accessing the innermost recording track, since a recess is formed in the case 2 of the disk cartridge 1, there is no interference between the mounting frame 12 and the case 2. , optical head 1
0 movement distance can be reduced.

Further, as the rotating frame 27 rotates as shown by the arrow in response to the forward and backward movement of the light opening head 10 from the abutting position shown by the dotted chain line to the retracted position, the rudder 10 further moves towards the light as in the first embodiment. Distance can be reduced.

In these two embodiments, the present invention is applied to a cartridge and a drive device for a magneto-optical disk, but the present invention is not limited thereto, and can be applied to other disks and drive devices such as optical disks and magnetic disks. .

Further, in these two embodiments, the magnetic head is moved forward and backward by contacting a spring and a stopper, but the present invention is not limited to this. It may be moved forward or backward.

Furthermore, in the above two embodiments, a disk cartridge having a concave portion and a disk drive device that can move forward and backward are used in combination to shorten the moving distance of the head, but the disk cartridge and the disk drive device are each used independently. Needless to say, the moving distance of the head can be shortened and the drive device can be downsized.

〔Effect of the invention〕

As described above, according to the first aspect of the invention, since the recess is formed at the side end on the insertion side of the disk cartridge, the moving distance of the head constituted by the frame that straddles the disk can be reduced. According to the second invention, the head arm attached to the frame that spans both sides of the disk is movable forward and backward with respect to the frame, so that the head moves between the outermost recording track and the rearmost retracted position. At times, the head arm can be moved forward and backward relative to the frame, the distance traveled by the head can be reduced, and the drive device can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the external appearance of a disk cartridge according to the present invention, FIGS. 2 and 3 are plan and side views showing the structure of the drive device, and FIGS. 4 and 5 are enlarged plan views of the magnetic head mechanism. and a side view, FIGS. 6 to 9 are diagrams for explaining the operation, and FIG. 10 is a plan view of a disk cartridge of another embodiment.
Figures 11 and 12 are plan and side views showing the structure of a drive device of another embodiment, Figure 13 is a perspective view showing the external appearance of a conventional disk cartridge, and Figure 14 shows the configuration of a conventional drive device. FIG. 1...Disk cartridge 2...Case 3...
・Shutter 8... Concavity 11... Magnetic head 12
...Mounting frame 15a, 15b...Spring 26...Mounting arm In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A disk for recording information, a flat box-shaped case with an opening formed on one side of the disk through which a head movable in the radial direction of the disk should face, and a position where the opening is closed and a position where the opening is opened. In the disk cartridge, the opening is wider than the dimension of the head in the direction intersecting the moving direction of the head, and the opening is wider than the dimension of the head in the direction intersecting the moving direction of the head. A disc cartridge characterized in that a recess is formed with a width narrower than the width of the disc cartridge. (2) A frame that spans both sides of a disk having a recording section for recording information and is movable in the radial direction of the disk, a head arm extending from one end of the frame, and a frame provided at the tip of the head arm. a disk drive device that accesses the disk to record/reproduce information, the disk drive having a head section configured to access the disk and record/reproduce information, comprising means for engaging the head arm and the frame so as to move back and forth; and a means for moving the head arm back and forth. means for biasing in one direction, when the frame moves between a moving end on the outer circumferential side of the disk and a recording section on the outermost circumference of the disk, the head arm is biased in one direction according to the moving direction. 1. A disk drive device for a disk cartridge, characterized in that said frame is moved forward and backward relative to said frame.