JP3355664B2 - Loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading device applied to a magneto-optical disk device for recording / reproducing information signals on / from a magneto-optical disk.

[0002]

2. Description of the Related Art For example, as a magneto-optical disk device for writing and / or reading information signals to / from a magneto-optical disk rotatably stored in a cartridge, the disk cartridge is transported to a predetermined mounting position. It comprises a loading mechanism, a rotary drive mechanism for rotating the magneto-optical disk at the mounting position, an optical pickup device for writing and reading information signals to and from the magneto-optical disk, and an external magnetic field generator.

The loading mechanism has a cartridge holder configured to hold the disk cartridge, and is configured to move the cartridge holder using a cam or the like. In such a loading mechanism,
When the disk cartridge held by the cartridge holder is moved in a direction parallel to the chassis and conveyed right above the rotary drive mechanism, the disk cartridge is lowered in a direction approaching the chassis. ing. The magneto-optical disk in the disk cartridge lowered in a direction approaching the chassis is held by the rotation drive mechanism provided on the chassis.

The rotary drive mechanism comprises a spindle motor and a disk table fixed to a spindle shaft of the spindle motor, and is configured to rotate the magneto-optical disk while holding it on the disk table. ing.

On the other hand, the optical pickup device and the external magnetic field generating device are provided at positions facing each other with the magneto-optical disk placed on the disk table therebetween. The external magnetic field generator is moved up and down with respect to the disk cartridge by an actuator or the like so as not to come into contact with the disk cartridge until the disk cartridge is transported to a predetermined mounting position and mounted on the disk table. It has been made to be.

[0006]

In the above-described magneto-optical disk drive, since the disk cartridge needs to be moved up and down with respect to the rotary drive mechanism, not only is the up and down drive mechanism complicated, but also the up and down movement is required. Space is needed to make it work. Similarly, the external magnetic field generator also needs to be moved toward and away from the signal recording surface of the magneto-optical disk with the loading operation of the disk cartridge.
Again, the vertical drive mechanism is complicated, and a large space for vertical movement is required.

[0007] The space in which the disk cartridge and the external magnetic field generator are moved up and down is a factor for increasing the thickness of the mechanical deck. For this reason, in recent years, it has become difficult to cope with a magneto-optical disk device that is gradually becoming smaller and thinner from 5 inches to 3.5 inches, 2.5 inches, or the like.

Further, since the spindle motor is fixed on the chassis, the frequency of the spindle motor and the frequency of the external magnetic field generator cause interference. As a result, there arises a disadvantage that accurate writing and / or reading of information signals to / from the magneto-optical disk cannot be performed.

Based on such a situation, the applicant of the present application further inserts the disk cartridge horizontally into the cartridge holder fixed to the chassis side instead of moving the disk cartridge up and down, and accompanying the loading operation. A loading device that raises a spindle motor and a cartridge positioning member has been proposed. With this configuration, the large and complicated disk cartridge vertical drive mechanism can be omitted, and the thickness of the magneto-optical disk device can be reduced.

However, when the spindle motor is raised with the disk cartridge fixed, the disk cartridge cannot be held by the cartridge positioning portion for positioning the cartridge in the height direction. Therefore, it is conceivable to position the disk cartridge by pushing up the disk cartridge from below and biasing the disk holder against the inner wall surface of the top plate of the cartridge holder. However, since the lower surface of the disk cartridge facing the spindle motor is usually manufactured as a height reference surface, the upper surface of the disk cartridge cannot be used as the reference surface.

Accordingly, the present invention has been proposed to solve such a conventional technical problem, and provides a loading device capable of reliably positioning a disk cartridge in a cartridge positioning portion during loading. The purpose is to:

[0012]

A loading device according to the present invention comprises: a cartridge holder provided with a positioning portion for positioning a disk cartridge; pressing means for pressing the disk cartridge held by the cartridge holder against the positioning portion; A pressing means operating the pressing means, the pressing means being operated by the pressing means operating section to press the disc cartridge against the positioning portion of the cartridge holder during loading, and to press the disc cartridge during unloading. It is characterized by being released.

[0013]

[0014]

The pressing means comprises a leaf spring or a rotating member and a biasing means for biasing the rotating member in the pressing direction.

[0016]

According to the present invention, during loading,
The pressing means is operated by the pressing means operating section, and the disk cartridge is pressed against the positioning section of the cartridge holder by the pressing means. Therefore, the positioning of the disk cartridge at the time of loading is assured, and good recording and reproduction on the disk stored in the disk cartridge can be performed. On the other hand, at the time of unloading, the pressing means is operated by the pressing means operating section, and the pressing of the disk cartridge by the pressing means is released.

[0017]

Further, since the pressing means comprises a leaf spring or a rotating member and a biasing means for biasing the rotating member in the pressing direction, the structure is simple, and the manufacturing is easy.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below in detail with reference to the drawings. This embodiment is an example in which the present invention is applied to a magneto-optical disk device that records and / or reproduces data on and from a magneto-optical disk.

First, a disk cartridge in which a magneto-optical disk mounted on the magneto-optical disk device is rotatably housed will be described.

[1] Configuration of Disk Cartridge As shown in FIGS. 20 and 21, a disk cartridge 201 includes a disc-shaped magneto-optical disk 202,
A cartridge 203 rotatably accommodates the magneto-optical disk 202.

The magneto-optical disk 202 has a magnetic recording layer in a data recording area, and can write and / or read information signals to or from the magnetic recording layer by magneto-optical means. It is. The magneto-optical disk 202 has one main surface serving as a signal recording surface. A disc-shaped chucking hub 202a made of a metal material for chucking by the magneto-optical disc device of the present embodiment is provided at one central portion of the magneto-optical disc 202.

The cartridge 203 comprises a pair of upper and lower halves 204 and a lower half 2 each having a rectangular shape sized to accommodate the magneto-optical disk 202 therein.
The upper half 204 and the lower half 20
5 and butted and connected. And
The cartridge 203 contains the magneto-optical disk 20.
2 is rotatably stored.

The lower half 205 of the cartridge 203 includes a chucking hub 202a provided at the center of the magneto-optical disk 202 and a signal recording surface of the magneto-optical disk 202 housed in the cartridge 203. A first opening 206 for opening the portion outwardly over the inner and outer peripheries is provided. The first opening 20
6 is provided at substantially the center of one side 207 and the other side 208 of the cartridge 203 in the left-right direction.
3 is formed as an elongated hole from the front surface 209 side to the center thereof.

When the disk cartridge 201 is mounted on the magneto-optical disk device, the first opening 206 is used to rotate the chucking hub 202a to rotate the magneto-optical disk 202. The magneto-optical disk 2
The signal recording surface of No. 02 faces an optical pickup device for irradiating the signal recording surface with a laser beam.

On the other hand, a second opening 216 is opened in the upper half 204 at a position opposite to the first opening 206 provided in the lower half 205. This second
The opening 216 of the cartridge 203
09, and the magneto-optical disk 2
02 is formed in a rectangular shape large enough to expose a part of the other main surface portion to the outside over the radially inner and outer circumferences. The second opening 216 applies an external magnetic field to the other main surface of the magneto-optical disk 202 when the disk cartridge 201 is mounted on the magneto-optical disk device. To face the magnetic head.

The front part 2 of the cartridge 203
In a portion corresponding to the first opening 206 and the second opening 209, the magnetic head and the optical pickup device can easily enter the magneto-optical disk 202 in close proximity to each main surface of the magneto-optical disk 202. Notch recess 206 for forming
a, 216a are provided respectively. That is, the thickness of the central portion near the front portion 209 of the cartridge 203 is different between the first opening 206 and the second opening 2.
The portions corresponding to 16 are thin. Thus, when the disk cartridge 201 is loaded, contact of the cartridge 203 with the magnetic head and the optical pickup device is avoided, and these are arranged close to the signal recording surface of the magneto-optical disk 202.

A shutter member 211 for opening and closing the first opening 206 and the second opening 216 is slidably attached to the cartridge 203. The shutter member 211 is a first half of the lower half 205.
Shutter plate 212 for closing the opening 206 of the shutter
A second shutter plate portion 213 disposed in parallel to the first shutter plate portion 212 to close the second opening 216 of the upper half 204; and the first and second shutters. A connecting piece 214 connects the base ends of the plates 212 and 213 to each other.

The first shutter plate section 212 is formed as a narrow and long rectangular body which is sufficient to close the first opening 206 of the lower half 205. The distal end side of the first shutter plate portion 212 is pressed and supported by a shutter pressing plate 215 attached to the outer surface of the lower half 205, and is prevented from floating from the cartridge 203. On the other hand, the second shutter plate 213
It is formed as a wide rectangular body large enough to close at least the second opening 216.

The shutter plate portions 212 and 21
3 is connected to the shutter member 21.
1 is slid and the magneto-optical disk 202 is in the open state with the magneto-optical disk 202 facing outward.
The central portion of the cartridge 20 is made thinner in order to bring the magnetic head and the optical pickup device close to each other.
3 is formed to a thickness substantially equal to the thickness. Further, the other end of the torsion coil spring having one end locked in the cartridge 203 is locked to the connecting piece 214.
That is, the torsion coil spring connects the shutter member 211 to the first opening 206 and the second opening 2.
The cover 16 is always urged to move in the closing direction. The connecting piece 214 slides along the front surface 209 of the cartridge 203 so that the shutter member 211 can perform a stable sliding operation.

The shutter member 211 thus configured
The first opening 206 and the second opening 21
20 can be moved in the direction of the arrow X in FIG. 20 over a position where the cover 6 is closed and a position where the openings 206 and 216 are opened. Then, the cartridge 203
The front surface 209 of the shutter member 21 is provided with a shutter release pin provided in a cartridge holder to be described later.
When the shutter 1 is moved, the shutter opening pin is fitted to the first opening 206 and the second opening 2.
Shutter opening member fitting portion 2 for opening cover 16
24 are formed. This shutter opening member fitting portion 2
Reference numeral 24 denotes a substantially U-shaped notch at a position where the leading end 219 of the connecting piece 214 of the shutter member 211 faces when the first opening 206 and the second opening 216 are opened. It is formed as a groove.

The lower half 205 is associated with a cartridge positioning pin, which is a cartridge positioning member for positioning the mounting position of the disk cartridge 201 in the horizontal direction when the disk cartridge 201 is mounted on a magneto-optical disk device. A pair of cartridge positioning pin engagement holes 225 and 226 are provided. Further, the lower half 205 is provided near the one cartridge positioning pin engaging hole 226 with an erroneous erasure preventing member 227 for selecting whether or not the information signal can be written to the magneto-optical disk 202. I have. Further, near the front side of the one side surface portion 207 of the cartridge 203, a cartridge pull-in pin insertion hole 228 for inserting the cartridge hold pin provided in the loading mechanism of the magneto-optical disk device into the disk cartridge 201 is formed. I have.

Next, a description will be given of a magneto-optical disk device for recording and / or reproducing data on and from the magneto-optical disk 202 housed in the disk cartridge 201 constructed as described above.

[2] Schematic Configuration of Magneto-Optical Disk Device As shown in FIG. 1, the magneto-optical disk device has a disk loading mechanism for pulling a disk cartridge 201 to a predetermined mounting position, and a rotating magneto-optical disk 202. A disk rotation drive mechanism to be operated, a cartridge positioning means for positioning the disk cartridge 201 with respect to the disk cartridge 201 held at a predetermined mounting position, and an elevating mechanism for driving the disk rotation drive mechanism up and down with respect to the disk cartridge 201. ,
An optical system for recording and / or reproducing information signals on and from the magneto-optical disk 202 by performing a transfer operation in the radial direction over the inner and outer circumferences of the magneto-optical disk 202;
02 is provided with a mechanism such as a magnetic head device for applying an external magnetic field when recording an information signal.

[2-a] Configuration of Disk Loading Mechanism As shown in FIG. 2, the disk loading mechanism includes a cartridge holder 1 having an auto-injection mechanism for automatically pulling the disk cartridge 201 to a predetermined mounting position. Have. The cartridge holder 1 includes:
Disk cartridge 2 penetrating in the front-rear direction
The housing is formed as a flat housing having a rectangular cross section and having a cartridge insertion / removal opening 2 functioning as an insertion opening of the cartridge 01. In addition, a plurality of insertion guide pieces 3 and 4 are provided in the vicinity of each corner in order to facilitate insertion of the disc cartridge 201 into the cartridge holder 1 at the peripheral portion of the cartridge insertion / removal opening 2. .

The auto-inject mechanism provided in the cartridge holder 1
The first injector plate 5 slidable in the insertion / removal direction of the disk cartridge 201 and the disk cartridge 201 is retracted by being inserted into the cartridge insertion pin insertion hole 228 of the disk cartridge 201 by the movement of the first injector plate 5. A second injection plate 6,
A third injector plate 7 forcibly sliding the first injector plate 5 in the depth direction of the cartridge holder 1.

The first injection plate 5 is mounted on the disk cartridge 201 of the cartridge holder 1.
Is provided on a lower plate portion (not shown) of the one side edge in the insertion direction of. The first injection plate 5 engages with a pair of guide shafts 8 and 9 erected on the lower plate portion of the cartridge holder 1 to move the disc cartridge 201 in the insertion direction of the disc holder 201 into the cartridge holder 1. As shown by an arrow A in FIG. That is, at the position corresponding to each guide shaft 8, 9 of the first injection plate 5,
Advancing / retracting operation guide grooves 10 and 11 formed as long holes formed along the insertion direction of the disc cartridge 201 are provided, and the guide shafts 8 and 9 are inserted into and engaged with these advancing / retreating operation guide grooves 10 and 11, respectively. The first injection plate 5 can be moved forward and backward.

The first injector plate 5 is provided with a notch 13 which engages with an injector plate operation pin 12 provided on a third injector plate 7 described later. The notch 13 is provided on the distal end side of the first injection plate 5 that extends to the cartridge insertion / removal opening 2, and has a size large enough to allow the injection plate operation pin 12 to face, and is open at one end. It is formed as a U-shaped groove. Further, in the depth direction of the first injection plate 5, a cartridge contact portion 14 for contacting the shutter member 211 of the disk cartridge 201 inserted into the cartridge holder 1 is provided. The cartridge contact portion 14 is bent from a notch (not shown) cut into a lower plate portion of the cartridge holder 1 so as to face the holder.

Further, the rear end of the first injector plate 5 in the depth direction comes into contact with a trigger arm pin 16 mounted on a trigger arm 15 provided on the lower plate of the cartridge holder 1. A trigger arm turning operation piece 17 is provided. The trigger arm rotation operation piece 17 is bent and formed so as to face the inside of the cartridge contact portion 14 from a notch portion cut out in the lower plate portion of the cartridge holder 1 like the cartridge contact portion 14 described above. The trigger arm 15 which comes into contact with the trigger arm rotation operation piece 17 serves to hold an unloading state of a slide member described later, and is centered on a support shaft 18 provided on a lower plate portion of the cartridge holder 1. Is provided rotatably. The trigger arm 15
Has a locking claw 15a at the tip end thereof for engagement with a slide member locking pin, which will be described later, provided on the slide member, and has a columnar trigger arm pin 16 that comes into contact with the trigger arm rotation operation piece 17. are doing. The trigger arm 15 is always urged by a torsion coil spring 19 shown in FIG. 8 in a direction in which the locking claw 15a engages with the slide member locking pin.

On the other hand, the second injection plate 6
A rotating shaft 2 that is set on the lower end of the cartridge holder 1 at the rear end of the first injection plate 5
0 so as to be rotatable in the direction indicated by arrow B in FIG. The second injection plate 6 is provided with a cartridge hold pin 21 that fits into the cartridge insertion pin insertion hole 228 of the disk cartridge 201 that is inserted into the cartridge holder 1 from the cartridge insertion opening 2. It is standing. The cartridge hold pin 21 is located outside the cartridge holder 1 when the disc cartridge 201 is in a state before being inserted into the cartridge holder 1. When the disc cartridge 201 is inserted into the cartridge holder 1 and the cartridge draw-in pin insertion hole 228 and the cartridge hold pin 21 are located at positions facing each other, the second
Is rotated so that the cartridge hold pins 21 planted on the injector plate 6 are inserted into the cartridge retracting pin fitting holes 228.

That is, when the cartridge 2 is in the unloading state, the second injection plate 6
And the disc cartridge 201 is inserted into the cartridge holder 1 and the disc cartridge 20 is
1, a hole 228 for inserting a cartridge retraction pin.
When the second injection plate 6 rotates when the cartridge hold pin 21 and the cartridge hold pin 21 are opposed to each other, the second injection plate 6 rotates the cartridge hold pin 21 into the cartridge draw-in pin fitting hole 228. A cam groove 22 is formed. The guide shaft 9 implanted in the cartridge holder 1 facing the advance / retreat operation guide groove 11 provided at the rear of the first injector plate 5 is inserted into the cam groove 22. .

The third injector plate 7 forcibly slides the first injector plate 5 in the depth direction of the cartridge holder 1, and is substantially perpendicular to the direction in which the disc cartridge 201 is inserted. The lower part of the cartridge holder 1 is rotatable about a support shaft 23. And this third
An injection plate operation pin 12 that engages with a notch 13 provided in the first injection plate 5 is planted at one edge of the injection plate 7. At the other end of the third injection plate 7, an injection plate holding pin 24 that comes into contact with an injection plate holding piece 131 provided on one slide piece of a slide member described later is planted. I have. The third injection plate 7 includes an injection plate operation pin 12 and an advance / retreat operation guide groove 1.
2 and is always urged to rotate in the direction of arrow C in FIG. 2 by a tension coil spring 25 hung over the guide shaft 9 facing the cam groove 22.

The cartridge holder 1 has a shutter member 2 of the disk cartridge 201 inserted into the cartridge holder 1 through the cartridge insertion / removal opening 2.
A shutter opening device that automatically opens the shutter 11 is provided. The shutter opening device mainly includes a cam groove 26 formed in the upper plate portion 1a of the cartridge holder 1;
A shutter release pin support member 28 as a support member provided with a shutter release pin 27 which is a shutter release member that moves toward the cam groove 26.

The cam groove 26 allows the shutter member 211 of the disc cartridge 201 inserted into the cartridge holder 1 to move.
Is formed so as to draw a trajectory that opens in conjunction with the insertion operation. That is, the cam groove 26 is formed as shown in FIG.
As shown in FIG. 5, an inclined portion 26a formed on the starting end side which is obliquely inclined with respect to the insertion direction of the disk cartridge 201 (the direction indicated by arrow D in FIG. 3), and this inclined portion 26a
An arc-shaped portion 26b, which is formed continuously with the arc-shaped portion, and a linear portion 26c, which is provided continuously with the arc-shaped portion 26b and is provided on the rear end side substantially parallel to the insertion direction of the disc cartridge 201 .

The inclined portion 26a of the cam groove 26 serves to generate a component force for opening the shutter member 211 of the disk cartridge 201 inserted into the cartridge holder 1 from the cartridge insertion / removal opening 2.
The inclination angle θ of the inclined portion 26a has an angle of at least 25 degrees or more with respect to the insertion direction of the disk cartridge 201 in order to generate a component force for rotating the shutter release pin 27 by inserting the disk cartridge 201. It is necessary.

The arc-shaped portion 26b provided continuously to the inclined portion 26a serves to minimize the movement locus of the shutter release pin support member 28 as much as possible.
If such a portion is linear, the movement trajectory of the shutter release pin support member 28 becomes large, and the rear end 28a of the shutter release pin support member 28
The cartridge holder 1 is swollen more outward and pivots, causing an accident that the cartridge holder 1 comes into contact with another member provided outside the cartridge holder 1. However, by forming the cam groove 26 in an arc shape as in this example, the movement trajectory of the shutter release pin support member 28 is reduced, and the cartridge holder of the rear end edge 28a of the shutter release pin support member 28 is reduced. The protrusion from 1 is suppressed as much as possible. As a result, another member provided outside the cartridge holder 1 can be provided at a position close to the cartridge holder 1, and the size of the magneto-optical disk device can be reduced.

On the other hand, the linear portion 26c provided continuously with the arc-shaped portion 26b serves to move the disk cartridge 201 to the rear end of the cartridge holder 1 with the shutter member 211 fully opened. By moving the disk cartridge 201 to the rear end of the cartridge holder 1 with the shutter member 211 opened, contact between a magnetic head and an optical pickup device, which will be described later, and the disk cartridge 201 can be avoided. A mechanism for moving the head up and down can be omitted.

The shutter opening pin support member 28 is formed as a plate-like body having a substantially rectangular shape in plan view, both of which have a front end portion 28b and a rear end portion 28a formed in an arc shape. Shutter release pin 2 facing
7. The shutter release pin 27 is formed as a column-shaped pin, and is suspended in the cartridge holder 1 via the cam groove 26. The shutter release pin support member 28 is formed with a slide groove 29 having a long hole shape extending from a rear end portion 28a to a substantially central portion. The slide groove 29 has a movable guide pin 3 as an engaged portion which is movable along a guide portion 30 formed in the cartridge holder 1.
1 are engaged. Such a guide portion 30
Is formed as a slot having an elongated hole shape provided in parallel with the linear portion 26c of the cam groove portion 26, and the movable guide pin 3
1 is freely movable. On the other hand, the moving guide pin 31 has a disc-shaped flange provided at the upper and lower ends of a columnar pin large enough to be movable toward the guide portion 30.

The shutter release pin support member 28 constructed as described above is constantly moved by the tension coil spring 32 in a direction in which the shutter release pin 27 indicated by an arrow E in FIG. Being energized. That is, the tension coil spring 32 has one end locked by a spring locking piece 33 provided on the shutter release pin support member 28 and the other end cut and raised by the upper plate portion 1a of the cartridge holder 1. The shutter release pin 27 is positioned at the starting end position of the cam groove 26, that is, at the initial position of the inclined portion 26a, by being locked to the locking piece 34.

The upper plate portion 1a of the cartridge holder 1 regulates the position of the disk cartridge 201 to be inserted into the cartridge holder 1 so that the disk cartridge 201 is not inserted further inward than the predetermined mounting position, ie, the loading position. Cartridge insertion position regulating member 35 is formed. This cartridge insertion position regulating member 3
Reference numeral 5 is provided so as to protrude further rearward from the rear end edge of the upper plate portion 1a, and is bent so that the front end portion thereof hangs down in the cartridge holder 1. Further, the cartridge holder 1 is provided with a notch 36 facing a magnetic head and an optical pickup device described later.

Further, the cartridge holder 1
Is provided with a disc cartridge pressing member 38 as pressing means for pressing and fixing the disc cartridge 201 to a cartridge positioning portion 37 for positioning the disc cartridge 201 provided in the cartridge holder 1 in the height direction at the time of loading. The disc cartridge pressing member 38 is provided on both side walls 1b and 1 in the cartridge holder 1 insertion direction of the disc cartridge 201.
At the substantially central portion of c, cutout portions 39 and 40 cut out over a part of the upper plate portion 1a are provided respectively.
As shown in FIG. 5, one of these disc cartridge pressing members 38 is in contact with the support portion 41 fixed to the lower plate portion of the cartridge holder 1 and the upper surface 201a of the disc cartridge 201 only during loading. A cartridge pressing portion 42 for urging the disk cartridge 201 toward the cartridge positioning portion 37
And a cartridge avoiding portion 43 for avoiding the cartridge pressing portion 42 at a non-contact position with respect to the disk cartridge 201 in the unloading state.

The disk cartridge pressing member 38
Are integrally formed by bending a leaf spring made of a thin metal plate into a predetermined shape. The support part 41
Is formed in a substantially rectangular shape in a plane, and has a stepped shape having a step around a substantially central portion thereof. The support portion 41 is fixed to the lower plate portion of the cartridge holder 1 with rivets 44, 45 and the like to support the lower end portion of the cartridge holder 1 in a so-called cantilever state in which the distal end side is free. Have been.

The cartridge pressing portion 42 is connected to the connecting portion 4 connected to the distal end side of the supporting portion 41 in a cantilever state.
2a and a pressing portion 42b provided on the tip side of the connecting portion 42a. The connecting portion 42 a is provided outside the side wall 1 c of the cartridge holder 1 and perpendicular to the support portion 41 so as not to come into contact with the disk cartridge 201 inserted into the cartridge holder 1. I have. On the other hand, the pressing portion 42b
The connecting portion 42a is provided at the tip of the connecting portion 42a substantially orthogonal to the connecting portion 42a, and faces the notch 40. The pressing portion 42b is used for loading the disc cartridge 2 inserted into the cartridge holder 1 during loading.
In contact with the upper surface 201a of the cartridge holder 1, the disc cartridge 201 is pressed and fixed to a cartridge positioning portion 37 provided in the cartridge holder 1, and is provided at a position which is prevented from contacting the disc cartridge 201 during unloading.

The cartridge avoiding portion 43 is provided in a substantially rectangular shape so as to extend in a direction in which the disc cartridge 201 is inserted from a connection portion between the support portion 41 and the cartridge pressing portion 42. The cartridge avoiding portion 43 comes into contact with a cartridge pressing portion operation projection provided on a slide member described later in an unloading state and does not contact in a loading state. At the connecting portion of the support portion 41 and the cartridge pressing portion 42 on the opposite side of the cartridge avoiding portion 43, the cartridge pressing portion operation projection is used to push the disc cartridge pressing when shifting from the loading state to the unloading state. A bent portion 46 for preventing the member 38 from being caught is provided.

In the disc cartridge pressing member 38 thus formed, the cartridge pressing portion operation projection comes into contact with the cartridge avoiding portion 43 in the unloading state, so that the cartridge pressing portion 42 is moved upward. The cartridge holder 1 is lifted, and the pressing portion 42b of the cartridge pressing portion 42 is
It is provided at a position where it does not come into contact with the disk cartridge 201 and the shutter release pin support member 28 inserted therein. On the other hand, in the loading state, the cartridge pressing portion operation projection is not in contact with the cartridge avoiding portion 43, the support of the cartridge pressing portion 42 is released, and the pressing portion 42b of the cartridge pressing portion 42 The disk cartridge 201 comes into contact with the upper surface 201a of the disk cartridge 201 and resiliently urges the disk cartridge 201 toward the cartridge positioning portion 37 of the cartridge holder 1. In other words, the disc cartridge pressing member 38 allows the pressing portion 42b of the cartridge pressing portion 42 to be able to move in and out of the cartridge holder 1 with the loading operation of the cartridge holder 1. The disc cartridge pressing member 38 provided on the other side wall 1b of the cartridge holder 1 has exactly the same configuration, and a description thereof will be omitted.

By the way, the cartridge holder 1 having the auto-injection mechanism and the shutter opening device configured as described above is mounted on the bottom surface 47 of the chassis 47 shown in FIG.
The lower plate portion is placed on the cartridge holder mounting / fixing portion 48 having a predetermined height from a, and is fixed by screwing. Therefore, the height from the bottom surface 47a of the chassis 47 to the cartridge positioning portion 37 of the cartridge holder 1 becomes the reference height of the disk cartridge 201.

[2-b] Disk Rotation Driving Mechanism As shown in FIG. 3, the disk rotation driving mechanism has a spindle motor 49 which is driven to move up and down in the direction of coming and going with respect to the disk cartridge 201 by a lifting mechanism which will be described later. Do it. As shown in FIG. 6, the spindle motor 49 is configured by incorporating a rotary drive motor (not shown) in a columnar spindle support member 50. In the spindle support member 50, an annular flat surface 50 opposite to the side facing the chassis 47 is formed.
a is a disk mounting surface on which the magneto-optical disk 202 housed in the disk cartridge 201 is mounted. The spindle support member 50 has a recess 51 formed as a circular recess at a position lower than the disk mounting surface 50a.
Disk attracting magnet 5 so that the chucking hub 202a can be held by magnetic attraction force.
2 are provided. The magnet 52 is formed as a disk large enough to be accommodated in the recess 51, and has a spindle shaft insertion hole through which the spindle shaft 53 is inserted. The spindle shaft 53 of the spindle motor 49 is provided at the center of the recess 51 so as to protrude from the disk mounting surface 50a.

The spindle motor 49 is mounted on an elevating plate 54 which is driven to move up and down in the direction of coming and going with respect to the disk cartridge 201 by an elevating mechanism with the loading operation. That is, the spindle motor 49 has a disk-shaped spindle mounting portion 55 on the outer peripheral edge of the lower end side of the spindle support member 50 facing the chassis 47, and a circular mounting hole 56 provided in the spindle mounting portion 55. The spindle mounting holes 57 provided in the elevating plate 54 are aligned with each other and fixed by bolts or the like.

The spindle motor mounting portion 55 of the spindle motor 49 is provided with a spindle elevating guide hole 58 having a circular shape at opposing positions passing through the center of the spindle support member 50. In the spindle elevating guide hole 58, the spindle elevating and lowering of an annular spindle height positioning member 60 supported at a predetermined height position by a plurality (three in this example) of ribs 59 provided on the chassis 47. Guide pin 61 is inserted therethrough. That is, the spindle motor 49 inserts a pair of spindle elevation guide pins 61 provided on the spindle height positioning member 60 into the spindle elevation guide holes 58,
The spindle can be moved up and down along the guide pins 61.

The spindle height positioning member 60 is
As shown in FIG. 4, it is formed as an annular body having a spindle insertion hole 62 provided as a circular through hole having a size large enough to allow the spindle support member 50 to be inserted in the center. An attachment for fixing the spindle height positioning member 60 on the rib 60 is provided at a position facing the rib 59 provided on the chassis 47 on the outer peripheral edge of the spindle height positioning member 60. A part 63 is provided. An annular lower surface 60a of the spindle height positioning member 60 serves as a spindle height reference surface that regulates the height of the spindle motor 49 by contacting the elevating plate 54 raised by the elevating mechanism. I have. That is, the elevating plate 54 to which the spindle motor 49 is attached is raised by the elevating mechanism, and the position where the elevating plate 54 contacts the lower surface 60 a of the spindle height positioning member 60 is the height reference position of the spindle motor 49. Becomes

[2-c] Configuration of the lifting mechanism The lifting mechanism is, as shown in FIG.
7a and the disk cartridge 201 held at the cartridge mounting position by the above-described disk loading mechanism.
The apparatus includes a slide member 64 for vertically moving the lifting plate 54 provided with the cartridge positioning means for positioning the disk cartridge 1 and the disk rotation driving mechanism in accordance with the loading operation of the disk cartridge 201.

As shown in FIGS. 3 and 6, the elevating plate 54 is formed as a flat plate having a substantially T-shaped flat surface from which a portion to which the spindle motor 49 is attached protrudes. The elevating plate 54 is provided at a position corresponding to a portion where the spindle motor 49 is mounted.
A spindle support member insertion hole 65 having a circular shape through which the spindle support member 50 is inserted is provided. Further, an elongated hole 66 is provided to communicate with the spindle support member insertion hole 65 and to insert the spindle elevating guide pin 61 provided on the spindle height positioning member 60. The elongated holes 66 are provided at positions facing the spindle elevating guide pins 61, respectively.

Further, the elevating plate 54 is provided with first pins 67 and 68 constituting a first elevating drive unit for driving the spindle motor 49 up and down. These first pins 67, 68 are cylindrical body portions 67a,
68a, and circular flange portions 67b, 68b provided on the tip side of the body portions 67a, 68a and having a larger diameter than the body portions 67a, 68a. The first pins 67 and 68 are provided on both sides of the elongated hole 66 with pin mounting portions 69 and 7 bent toward the chassis 47.
It is rotatably attached to zero. The first pins 67, 68 rotatably mounted in this manner are connected to the body 6 thereof.
7a and 68a are provided between a pair of columns 71 and 72 provided at a predetermined interval on the bottom surface 47a of the chassis 47 shown in FIG. 4, so that the columns 7a and 68a can move up and down while being guided by the columns 71 and 72. . At this time, the first
Since the pins 67, 68 are provided with flange portions 67b, 68b having a larger diameter than the body portions 67a, 68a, the displacement of the elevating plate 54 in the direction of arrow F in FIG. 6 is regulated.

A cartridge positioning means which engages with the cartridge positioning pin engagement holes 225 and 226 provided in the disk cartridge 201 to position the mounting position of the disk cartridge 201 in the horizontal direction is formed on the elevating plate 54. Positioning pins 73 and 74 are provided. The cartridge positioning pins 73 and 74 are provided at positions opposed to the cartridge positioning pin engagement holes 225 and 226, respectively.
The tip portions 73a and 74a are formed in a conical shape so as to smoothly engage with the fifth and 226. Further, the cartridge positioning pins 73 and 74 are provided with disk-shaped flange portions 73b and 74b that come into contact with the peripheral edges of the openings of the cartridge positioning pin engaging holes 225 and 226 and function as stoppers.

Further, the elevating plate 54 is provided with second pins 75, 76 constituting a second elevating drive unit for driving the cartridge positioning pins 73, 74 up and down. These second pins 75 and 76 are rotatably mounted on pin mounting portions 77 and 78 which are located close to the cartridge positioning pins 73 and 74 and are bent toward the chassis 47. Further, the elevating plate 54 has a temperature sensor 79,
Write protect switch 8 for detecting the position of erroneous erasure prevention member 227 provided on disk cartridge 201
0 is provided. The temperature sensor 79 is provided at a position close to one of the cartridge positioning pins 74,
The write protect switch 80 is provided at a position close to the other cartridge positioning pin 73. The lifting plate 54 has a notch 81 having a substantially rectangular shape in a plane for preventing interference with the support shaft 23 rotatably supporting the third injection plate 7 provided in the cartridge holder 1. Is provided.

On the other hand, as shown in FIG. 3, the slide member 64 is a guide shaft 8 fixed at a predetermined position of the chassis 47.
This chassis 47 is guided by 2,83,84,85.
It is slidable on the top. The slide member 64 includes a pair of slide pieces 86 and 87 provided on both sides of the spindle motor 49 in parallel with each other and a connecting piece 88 for connecting the tips of the slide pieces 86 and 87 to each other. ing. The slide pieces 86, 87
Have guide shafts 82, 83,
Guide shaft slide grooves 89, 90, 91, 92 each having a long hole shape are formed at positions corresponding to 84, 85, respectively.

Further, the slide pieces 86 and 87 are engaged with the first pins 67 and 68 to engage with the spindle motor 4.
The first cam 9 which constitutes a first elevating drive unit for driving the elevating member 9 up and down with respect to the disc cartridge 201
3, 94 are provided. These first cams 93, 9
4 is the first pin 6 as shown in FIGS.
7 and 68 have cam grooves 95 and 96 to be engaged. The cam grooves 95 and 96 are provided with inclined portions 95a and 96a inclined at a predetermined inclination angle with respect to the chassis 47 and the chassis 4
7 and parallel portions 95b and 96b which are parallel to each other. The inclined portions 95a and 96a correspond to portions serving to raise the spindle motor 49, and the parallel portions 95b and 96b
This corresponds to a portion that serves to make the spindle motor 49 a maximum height position. When the first pins 67 and 68 reach the parallel portions 95b and 96b, the elevating plate 54 to which the spindle motor 49 is attached is moved by the spindle height positioning member 6.
0, and the spindle motor 49 is set at a predetermined height position. At this time, the first pins 67, 68 are provided with upper end surfaces 95c, 9 opposed to the parallel portions 95b, 96b in order to secure an accurate height position of the spindle motor 49.
6c.

At positions adjacent to the first cams 93 and 94, spring members 97 and 98 for securely positioning the spindle motor 49 at the raised position are provided. Since the left and right spring members 97 and 98 have the same shape, only one of them will be described below. As shown in FIG. 7, the spring member 98 is formed by bending a thin metal plate having spring properties.
A rising portion 99a of the mounting portion 99 having a substantially L-shaped cross section formed by the base portion 9a and the base end portion 99b is fixed to the side wall surface 94a of the first cam 94 by caulking with a rivet or the like. And this base end piece 9
9b, a vertical portion 100 extending along the rising direction of the spindle motor 49 and a gentle arc extending from the distal end of the vertical portion 100 toward the parallel portion 96b of the first cam 94. A curved portion 101 is provided.

In the unloading state, the curved portion 101 is not moved until the first pin 68 climbs the inclined portion 96a and reaches the parallel portion 96b.
And the front end side is parallel portion 9
6b is slightly popped out. Therefore, when the first pin 68 reaches the parallel portion 96b and rolls along the parallel portion 96b, the first pin 68 comes into contact with the curved portion 101, and the curvature of the curved portion 101 is reduced. To bend. FIG. 7 of the bending portion 101 at this time.
By the elastic force in the direction of the middle arrow G, the first pin 68
Lifting plate 54 for supporting the spindle height positioning member 6
Pressed to zero. As a result, the spindle motor 49
Is reliably positioned at the raised position, and its state is stably maintained.

Further, the slide pieces 86 and 87 include:
Cartridge pressing portion operation projections 102 and 103 are provided so that the disk cartridge pressing member 38 can be freely inserted into and retracted from the disk cartridge 201 with the loading operation. These cartridge pressing portion operation protrusions 102,
103 is a stepped extending portion 104, 105 provided obliquely rearward of the first cams 93, 94 so as to extend outward substantially perpendicular to the slide pieces 86, 87.
Are formed as arc-shaped protrusions at the tip of the. The cartridge pressing portion operation protrusions 102 and 103 contact the cartridge avoiding portion 43 provided on the disk cartridge pressing member 38 at the time of unloading and do not contact at the time of loading. The disk cartridge 201 can freely appear and disappear.

As shown in FIG. 13, a slide plate return spring 106 for forcibly sliding the slide member 64 from the unloading position to the loading position is provided at the rear end edge of one of the slide pieces 87. A spring hook portion 107 to be hooked is provided. The slide plate return spring 106 has one end hooked on the spring hook portion 107 and the other end hooked on the guide shaft 84 provided on the front end side provided on the chassis 47.
The slide member 64 is always urged to the loading position. Further, the rear end of the one slide piece 87 is forcibly pulled back from the loading position to the unloading position by the loading motor 108 against the urging force of the slide plate return spring 106. Plate pull-back piece 109 is provided. The plate pull-back piece 109 is adapted to engage with a cylindrical engaging pin (not shown) provided on a transmission gear 110 for transmitting the rotation of the loading motor 108. That is, when the loading motor 108 rotates, the transmission gear 110 rotates, and the transmission gear 110 rotates.
The engagement pin implanted in the plate
, The slide member 64 is pulled back from the loading position to the unloading position.

When the loading member 108 sets the slide member 64 to the unloading position, as shown in FIG. 12, the locking claw 15a of the trigger arm 15 rotatably attached to the cartridge holder 1 The other slide piece 86 is engaged with a cylindrical slide member locking pin 111 provided at the rear end of the slide piece 86 to maintain the unloaded state of the slide member 64.

On the other hand, the connecting piece 88 has a cartridge positioning pin 7 for positioning the disk cartridge 201.
Second cams 112 and 113 that constitute a second lifting / lowering drive unit for lifting / lowering the 3, 74 are provided. These second cams 112 and 113 are connected to the first cams 93 and 9 described above.
Like FIG. 4, as shown in FIGS. 13 and 14, there are cam grooves 114 and 115 that engage with the second pins 75 and 76. The cam grooves 114 and 115 are provided in the chassis 47.
Inclined portions 114a, 1
15a and parallel portions 114b, 11 parallel to the chassis 47.
5b. The inclined portions 114a and 115a correspond to portions for raising the cartridge positioning pins 73 and 74, and the parallel portions 114b and 115b correspond to portions for setting the cartridge positioning pins 73 and 74 to the maximum height position. Is equivalent to

When the second pins 75 and 76 reach the parallel portions 114b and 115b, the cartridge positioning pins 73 and 74 provided on the elevating plate 54 are inserted into the cartridge positioning pin engagement holes 225 and 225 of the disk cartridge 201.
226 to position the disk cartridge 201. At this time, the second pins 75 and 76 are
In order to ensure accurate positioning of the disk cartridge 201, the disk cartridge 201 does not come into contact with the upper end surfaces 114c and 115c facing the parallel portions 114b and 115b.

In particular, the second cams 112, 11
The inclination angle of the inclined portions 114a and 115a is smaller than that of the spindle motor 49.
The first cams 93 and 94 have a larger inclination angle than the inclination angles of the inclined portions 95a and 96a in order to raise the members 3 and 74 in advance. Therefore, the first pins 67, 6
Before 8 reaches the parallel portions 95b and 96b of the first cams 93 and 94, the second pins 75 and 76 first reach the parallel portions 114b and 115b of the second cams 112 and 113, respectively. The disk cartridge 201 is positioned by the cartridge positioning pins 73 and 74. After that, the spindle motor 49 is positioned at a predetermined height position.

The first cams 93 and 94 and the second cams 112 and 113 have exactly the same cam shape, and the timing at which the first pins 67 and 68 come into contact with the first cams 93 and 94 will be described. Also, the first cams 93, 94 and the second cams 112, 94 are arranged so that the timing at which the second pins 75, 76 contact the second cams 112, 113 is advanced.
The position of 113 may be shifted. In this way, the cartridge positioning pins 73 and 74 can be raised before the spindle motor 49,
An accurate chucking operation can be performed in a state where the disk cartridge 201 is securely positioned.

[2-d] Configuration of Optical System and Magnetic Head Device The optical system is composed of an objective lens 116 for condensing and emitting a laser beam onto a signal recording surface of a magneto-optical disk 202 rotated by a spindle motor 49. And an optical pickup device 117 having: The optical pickup device 117 includes a pair of parallel guide rails 118 and 119 arranged in the radial direction of the magneto-optical disk 202.
Is provided on a carriage 120 which can be freely moved along. Then, the optical pickup device 11
Reference numeral 7 denotes magnets 121, 122 and yokes 123, 124 provided on both sides of the guide rails 118, 119.
Linear motors 127 and 128 composed of drive coils 125 and 126 are moved in the radial direction in opposition to the signal recording surface of the magneto-optical disk 202.

On the other hand, the magnetic head device has a magnetic head 129 provided with a magnetic field generating coil for applying an external magnetic field of a predetermined strength to the signal recording surface of the magneto-optical disk 202. The magnetic head 129 is attached to the distal end of a head support arm 130 having a base end fixed to the carriage 120 so as to be provided at a position facing the objective lens 116 with the magneto-optical disk 202 interposed therebetween. . Accordingly, when the optical pickup device 117 is sent in the radial direction of the magneto-optical disk 202, the magnetic head 129 maintains the position facing the objective lens 116 in synchronism with this, and The transfer operation is performed in the radial direction.

[3] Description of Mounting Operation of Disk Cartridge The operation of mounting the above-described disk cartridge 201 on the magneto-optical disk device configured as described above will be described. First, the disc cartridge 201 is inserted into the cartridge holder 1 from the cartridge insertion / removal opening 2 in a normal orientation. Then, as shown in FIG. 8, the shutter release pin 27 held at the initial position abuts on the front surface 209 of the disk cartridge 201.

When the disc cartridge 201 is further inserted into the cartridge holder 1 from this state, the disc cartridge 201 is pushed by the disc cartridge 201 to generate a component force on the shutter release pin 27, and the shutter release pin 27 is The cam groove 26 is moved along the inclined portion 26a. That is, when the disk cartridge 201 is pushed inward of the cartridge holder 1, the shutter release pin support member 28 resists the urging force of the tension coil spring 32 hung over the cartridge holder 1, and The movable guide pin 31 at an initial position on one end side of the guide portion 30 provided on the holder 1 is rotated around the center, and the shutter release pin 27 provided at the tip end portion 28 b is moved to the cam groove portion 26.
Is moved along the straight line portion 26a.

As a result, the shutter member 211 opens the openings 206 and 216 of the disc cartridge 201 indicated by the arrow H in FIG. 9 against the urging force of the torsion coil spring built in the cartridge 203. Moved in the direction.

When the disc cartridge 201 is further inserted into the cartridge holder 1, the shutter release pin 27 moves along the arcuate portion 26 b of the cam groove 26, and the shutter member 211 is further moved. When the shutter release pin 27 moves along the arcuate portion 26b, the shutter release pin support member 28 is at the initial position as when the shutter release pin 27 moves along the preceding inclined portion 26a. It turns around the movement guide pin 31. That is, in the range where the shutter release pin 27 moves from the inclined portion 26a to the arc-shaped portion 26b, the slide groove 29 is formed in the shutter release pin support member 28, so that the movement guide pin 31 is at the initial position. Will be. Therefore, in the range from the inclined portion 26a to the arc-shaped portion 26b,
The movement trajectory of the shutter release pin support member 28 is extremely small, so that the rear end portion 28a hardly jumps out of the disk cartridge 201.

When the shutter release pin 27 reaches the rear edge of the arc-shaped portion 26b, as shown in FIG.
The shutter release pin 27 enters the shutter release member fitting portion 224 provided on the cartridge 203. As a result, the openings 206 and 2 of the disc cartridge 201
16 is fully opened, and the magneto-optical disk 202 stored in the cartridge 203 is exposed.

Further, the disk cartridge 201
Is inserted into the cartridge holder 1, the moving guide pin 31 comes into contact with the front portion 209 of the disk cartridge 201. When the disk cartridge 201 further moves inward of the cartridge holder 1, the shutter release pin support member 28 is moved along with the disk cartridge 201 along the guide portion 30 while maintaining the state of FIG. .

In the middle, the disc cartridge 201 contacts the cartridge contact portion 14 of the first injection plate 5 slidably provided in the cartridge holder 1 as shown in FIGS. Touch When the disc cartridge 201 is further inserted inward from this state, the first injection plate 5 together with the disc cartridge 201 moves along the guide shafts 8 and 9 fixed to the cartridge holder 1 in FIG. It slides in the direction of insertion of the disk cartridge 201 indicated by the arrow I.

At this time, the second injector plate 6 is moved together with the first injector plate 5 in the insertion direction of the disk cartridge 201 in accordance with the sliding operation of the first injector plate 5, and The second injector plate 6 rotates in the direction of arrow J in FIG. 12 along the cam groove 22 provided in the second injector plate 6.

As a result, the cartridge hold pin 21 provided on the second injection plate 6 gradually turns the disk cartridge 201 with the rotation operation.
Of the cartridge withdrawal pin fitting hole 228.

When the disc cartridge 201 is further inserted into the cartridge holder 1, the trigger arm rotating operation piece 17 provided at the rear end of the first injection plate 5 is moved. Trigger arm 1 rotatably mounted on cartridge holder 1
5 comes into contact with the trigger arm pin 16. Then, as the first injection plate 5 further moves to the rear end side, the trigger arm 15
12 in the direction of arrow K in FIG. 12, the engagement with the slide member locking pin 111 fixed on the slide member 64 is released.

As a result, the slide member 64 is fixed to the chassis 47 by the slide plate return spring 106 stretched over one guide shaft 84 for guiding the slide member 64.
While being guided by 3, 84, 85, it starts to slide on the chassis 47 toward the cartridge insertion / removal port 2 side indicated by the arrow L in FIG.

Then, the injection plate holding piece 131 provided on the slide member 64 and the injection plate holding pin 2 of the third injection plate 7 are provided.
4 is released, and the third injection plate 7 is forcibly moved by the tension coil spring 25 which is stretched between the guide shaft 9 and the guide shaft 9 for guiding the first injection plate 5. 16 around the support shaft 23 in the direction of arrow M in FIG. When the third injection plate 7 rotates, the injection plate holding pin 24 implanted at the tip of the third injection plate 7 moves the first injection plate 5 to the disk cartridge 201 indicated by an arrow N in FIG. Slide in the direction of insertion.

As a result, at this point, the cartridge hold pins 21 of the second
Is inserted into the cartridge retraction pin fitting hole 228 of the disk cartridge 201, the disk cartridge 201 is automatically retracted in the depth direction of the cartridge holder 1. Then, the shutter member 211 of the disc cartridge 201 finally contacts the cartridge insertion position regulating member 35 provided in the cartridge holder 1, and the disc cartridge 2
01 is determined.

Further, when the slide member 64 slides toward the cartridge insertion / removal opening 2 side, the cartridge pressing portion operation projection 1 provided on the slide member 64 is provided.
When the engagement of the cartridge avoiding portion 43 of the disc cartridge pressing member 38 with the disc cartridge pressing member 38 is released, the disc cartridge 2 shown in FIGS.
01 from the state in which insertion of the disc cartridge pressing member 38 into the cartridge holder 1 is enabled.
2b enters the cartridge holder 1 and urges the upper surface 201a of the disk cartridge 201 downward.

As a result, the disc cartridge 201
As shown in FIGS. 17 to 19, the disk cartridge is pressed against the cartridge positioning portion 37 of the cartridge holder 1 by the elastic force of the disk cartridge pressing member 38, and is held at a predetermined height position.

When the slide member 64 slides toward the cartridge insertion / removal port 2, the first cams 93, 94 provided on the slide member 64 are provided with the first pins 67, 68 and the second pins 67, 68. The second pins 75 and 76 are engaged with the cams 112 and 113, respectively. When the slide member 64 is further slid toward the cartridge insertion / ejection opening 2 side, the inclined portions 9 of the first cams 93 and 94 are moved.
The first pins 67 and 68 rotate and rise on 5a and 96a, and the inclined portions 114a and 114a of the second cams 112 and 113 rotate.
The second pins 75 and 76 rise on the 115a while rotating.

At this time, the second cams 112, 113
The inclination angles of the inclined portions 114a and 115a of the first cams 93 and 94 are larger than the inclination angles of the inclined portions 95a and 96a of the first cams 93 and 94.
Is faster than the first pins 67 and 68 and reaches the parallel portions 114b and 115b of the second cams 112 and 113.

As a result, the leading end of the elevating plate 54 rises before the trailing end, and the cartridge positioning pins 73 and 74 provided at the leading end rise before the spindle motor 49. As a result, the cartridge positioning pins 73 and 74 are
01 cartridge positioning pin engagement holes 225, 226
And the disk cartridge 201 is positioned.

Thereafter, the first pins 67 and 68 reach the parallel portions 95b and 96b of the first cams 93 and 94, respectively.
The spindle motor 49 is raised, and the elevating plate 54 contacts the spindle height positioning member 60. Then
A spring member 97 disposed close to the first cams 93, 94,
By 98, the spindle motor 49 is held in a state of being resiliently biased to a predetermined height position.

As a result, the chucking hub 2 of the magneto-optical disk 202 stored in the disk cartridge 201
The spindle shaft 53 of the spindle motor 49 enters into 02a, and causes the magneto-optical disk 202 to be chucked accurately.

By ejecting the loading motor 108, the eject pin is mounted on the transmission gear 110 for transmitting the rotation of the loading motor 108 so that the engaging pin is mounted on the plate pull-back piece provided on the slide member 64. 109, the slide member 64 is pulled back from the loading position to the unloading position against the urging force of the slide plate return spring 106.

As a result, an operation completely opposite to the above-described loading operation is performed, and the cartridge positioning pins 73 and 73 are used.
74 is lowered to the chassis 47 side before the spindle motor 49, and the third injector plate 7 is rotated by the sliding operation of the slide member 64, and the first injector plate 7 is connected to this. The injection plate 5 is forcibly slid to the unloading state, and finally the disk cartridge 2
01 is forcibly discharged from the cartridge holder 1.

[4] Other Embodiment 1 [4-a] Modification of Pressing Means In the above-described embodiment, the disc cartridge 201 is moved by the resilient force of the leaf spring to the cartridge positioning portion 37.
For example, as shown in FIG. 22, a rotating member 132 rotatably supported with respect to the cartridge holder 1 and an urging means for elastically urging the rotating member 132 as shown in FIG. The same operation and effect can be obtained by using the barrel torsion coil spring 133.

As shown in FIGS. 23 and 24, the rotating member 132 is rotatably supported by rotating support pins 134 fixed to both side walls 1c and 1d of the cartridge holder 1. It has a moving piece 135. The rotating piece 135 faces the notches 39 and 40 cut out of the cartridge holder 1 and
A cartridge pressing portion 136 for pressing and fixing the cartridge 1 to the cartridge positioning portion 37 is provided. The cartridge pressing portion 136 is bent so that the front end faces the notches 39 and 40, and has a substantially J-shaped side surface. The tip 136a of the cartridge pressing portion 136
Are in contact with the upper surface 201a of the disk cartridge 201 inserted into the cartridge holder 1.

Further, the rotating piece 135 has a cartridge pressing portion operating projection 10 provided on the slide member 64.
A cartridge avoiding portion 137 is provided for holding the cartridge pressing portion 136 at a raised position where the cartridge pressing portion 136 does not contact the disk cartridge 201 inserted into the cartridge holder 1 during unloading by contact with the cartridge holder 2 and 103. The cartridge avoiding portion 137 is provided at a position opposed to the cartridge pressing portion operation protrusions 102 and 103 when the slide member 64 is at the unloading position.

The cartridge avoiding section 137 is
When the cartridge pressing portion 136 turns around the rotation support pin 134 in the direction of arrow O in FIG.
In order to prevent the cartridge 6 from projecting more than the upper plate portion 1a of the cartridge holder 1, it has an angle of θ with respect to the horizontal line. Further, when the slide member 64 is pulled back from the loading state to the unloading state, the cartridge avoiding portion 137 prevents the cartridge pressing portion operation protrusions 102 and 103 from being caught on the edge of the cartridge avoiding portion 137. Bent portion 138 is provided.

The rotating member 1 formed as described above
As shown in FIGS. 23 and 25, 32 is rotatably supported by a rotation support pin 134 and is locked by spring locking pins 139 fixed to both side walls 1c and 1d of the cartridge holder 1, respectively. Torsion coil spring 1
33, it is always urged in the direction indicated by arrow P in FIG. The torsion coil spring 133 has one end 1
33 a is locked by a spring locking piece 140 cut and raised on both side walls 1 c and 1 d of the cartridge holder 1, and the other end 133 b is provided by a spring locking piece 141 provided on the rotating piece 135.
It is locked facing the slit.

By providing the rotating member 132 on the cartridge holder 1 as described above, in the unloading state, as shown in FIG. 25, the cartridge pressing portion operating projections 102 and 103 provided on the slide member 64 cause the cartridge pressing portion to operate. 136 is held at a raised position where it does not come into contact with the disk cartridge 201 inserted into the cartridge holder 1, and in the loading state, the cartridge avoiding portion 137 and the cartridge pressing portion operation protrusion 10
The contact with the torsion coil spring 13 is released.
By 3, the cartridge pressing portion 136 presses and fixes the disk cartridge 201 to the cartridge positioning portion 37. As a result, the disk cartridge 201 is held at the predetermined height position.

[0107]

As is clear from the above description, the loading device according to the present invention is provided with the pressing means which is operated by the pressing means operating section in accordance with the loading operation of the disk cartridge. When the cartridge is loaded, the pressing means is operated by the pressing means operating section, and the disk cartridge is pressed against the positioning section of the cartridge holder by the pressing means. As a result, the positioning of the disk cartridge at the time of loading is assured, and recording and reproduction can be favorably performed on the recording disk stored in the disk cartridge. On the other hand, when the cartridge is unloaded, the pressing means is operated by the pressing means operating section, and the pressing of the disk cartridge by the pressing means can be released.

Further, in the loading device of the present invention, since the pressing means comprises a leaf spring or a rotating member and a biasing means for biasing the rotating member in the pressing direction, the configuration is extremely simple. It is easy to manufacture.

In the loading device of the present invention, since the cartridge positioning member rises before the spindle motor rises, the spindle motor rises after the disk cartridge is positioned by the cartridge positioning member. The recording disk is accurately inserted into the center hub, and the recording disk rotated by the spindle motor can be accurately chucked. Therefore, it is possible to perform stable recording and reproduction of information signals on a recording disk that is rotated by the spindle motor.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing the entire magneto-optical disk device.

FIG. 2 is a perspective view of a cartridge holder.

FIG. 3 is a perspective view of an elevating mechanism for elevating and lowering a cartridge positioning unit and a disk rotation driving mechanism.

FIG. 4 is a perspective view of a chassis.

FIG. 5 is an enlarged perspective view of a main part showing the pressing means in an enlarged manner.

FIG. 6 is an exploded perspective view showing a mounting state of a spindle motor to a lifting plate.

FIG. 7 is an enlarged perspective view of a main part showing a spring member arranged in proximity to the first cam in an enlarged manner.

FIG. 8 is a plan view showing an engagement state between the shutter release pin and the disk cartridge when the disk cartridge is mounted on the cartridge holder.

FIG. 9 is a plan view showing a state where the shutter member starts to be opened by a shutter release pin in a state where the disk cartridge is mounted on the cartridge holder.

FIG. 10 is a plan view showing a state where a shutter member is opened by a shutter opening pin in a state where the disk cartridge is mounted on the cartridge holder.

FIG. 11 is a plan view showing a state where the shutter member is fully opened by a shutter release pin in a state where the disk cartridge is mounted on the cartridge holder.

FIG. 12 is a plan view showing an operation state of the lifting mechanism in an unloading state.

FIG. 13 is a right side view of the lifting mechanism in an unloading state.

FIG. 14 is a left side view of the lifting mechanism in an unloading state.

FIG. 15 is a front view of the lifting mechanism in an unloading state.

FIG. 16 is a plan view showing an operation state of the lifting mechanism in a loading state.

FIG. 17 is a right side view illustrating an operation state of the lifting mechanism in a loading state.

FIG. 18 is a left side view showing an operation state of the lifting mechanism in a loading state.

FIG. 19 is a front view showing an operation state of the lifting mechanism in a loading state.

FIG. 20 is a perspective view of the disk cartridge when viewed from the upper half side.

FIG. 21 is a perspective view of the disk cartridge when viewed from the lower half side.

FIG. 22 is a perspective view illustrating a state in which a pressing unit according to a modified example is provided on a cartridge holder.

FIG. 23 is a side view of a pressing unit of a modified example.

FIG. 24 is a plan view of a pressing unit of a modified example.

FIG. 25 is a right side view showing an unloaded state of a magneto-optical disk device provided with a pressing means of a modified example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cartridge holder 5 ... 1st injection plate 6 ... 2nd injection plate 7 ... 3rd injection plate 15 ... Trigger arm 27 ... Shutter release pin 28 ... Shutter release pin support member 38 ... Disc cartridge pressing member 47 ... Chassis 49 ... Spindle motor 54 ... Elevating plate 64 ... Slide member 67,68 ... First pin 73 , 74 ... cartridge positioning pins 75, 76 ... second pins 93, 94 ... first cams 102, 103 ... cartridge pressing portion operation projections 112, 113 ... second cam 116 ... Objective lens 129 ... Magnetic head 132 ... Rotating member 133 ... Torsion coil spring 201 ... Disk cartridge 02 ... optical disk 202a ... chucking hub 211 ... shutter member 225 and 226 ... cartridge positioning pins engaging holes 228 ... cartridge retracting pin insertion hole

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 17/04

Claims (7)

(57) [Claims] A cartridge holder provided with a positioning part for positioning the disk cartridge; a pressing means for pressing the disk cartridge held by the cartridge holder against the positioning part; a pressing means operating part for operating the pressing means The pressing unit is operated by the pressing unit operation unit, and presses the disc cartridge against the positioning unit of the cartridge holder during loading,
A loading device for releasing the pressure on the disk cartridge during unloading. 2. The loading device according to claim 1, wherein the positioning portion of the disk cartridge is provided on a lower surface of the cartridge holder. 3. The apparatus according to claim 1, wherein said pressing means is attached to said cartridge holder for holding said disk cartridge so as to be able to protrude and retract within said cartridge holder with a loading operation. Loading device. 4. The loading device according to claim 1, wherein said pressing means comprises a leaf spring. 5. The loading device according to claim 1, wherein said pressing means comprises a rotating member and a biasing means for biasing said rotating member in a pressing direction. 6. An elevating plate provided with positioning means for positioning a disk cartridge held by the cartridge holder, and an elevating / lowering drive of the elevating plate with respect to the cartridge holder, and the pressing means operating section are provided. An operation of raising and lowering the elevating plate by the elevating mechanism at the time of loading, positioning the disk cartridge held by the cartridge holder by means of positioning means for the elevating plate, and elevating the elevating plate. The pressing means is operated by the pressing means operating part interlocked with, and the disk means is pressed against the positioning part of the cartridge holder by the pressing means. At the time of unloading, the elevating mechanism lowers the elevating plate, By the positioning means of the lifting plate The positioning of the disk cartridge held by the cartridge holder is released, and the pressing means is operated by the pressing means operating portion interlocked with the operation of lowering the elevating plate, thereby releasing the pressing of the disk cartridge by the pressing means. The loading device according to claim 1, wherein the loading is performed. 7. A disk rotation drive mechanism for rotating a disk housed in the disk cartridge, together with the positioning means, is provided on the lift plate, and the lift mechanism moves the lift plate to the cartridge holder. A first lifting / lowering drive unit that drives the disk rotation drive mechanism up / down with respect to the disk cartridge in conjunction with an operation of lifting / lowering the disk cartridge; An elevating drive unit, wherein at the time of the loading, the positioning means of the elevating plate is raised by the second elevating drive unit, and after positioning the disk cartridge held by the cartridge holder by the positioning means, 1 raises and lowers the disk rotation drive mechanism, Loading device according to claim 4, characterized in that to hold the disc housed in said disc cartridge by rotation drive mechanism.