JP2585176B2 - Magneto-optical disk recording / reproducing 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 magneto-optical disk recording and reproducing apparatus.

[0002]

2. Description of the Related Art In order to prevent damage when loading or unloading a magnetic disk or magneto-optical disk as a recording medium in a recording / reproducing apparatus, and to prevent contamination of the recording medium surface, a plastic or the like having a head window opened is used. A disk cartridge in which a disk is rotatably housed in a hard jacket and the head window is covered with a shutter which can be opened and closed so that dust and consultation do not enter from the head window is disclosed in, for example, Japanese Utility Model Publication No. 61-38145. Have been described.

In the above-mentioned disk cartridge, the shutter must be manually opened before the disk cartridge is inserted into the recording / reproducing apparatus, and the shutter must be closed after the disk cartridge is removed from the recording / reproducing apparatus. Performing such a shutter opening / closing operation manually is not only troublesome, but also undesirably pollutes the surface of the magnetic body when the shutter is opened / closed.

Accordingly, a device has been developed which automatically opens and closes a shutter in conjunction with the loading / unloading of a disk cartridge with respect to a recording / reproducing device.
No. 5895.

[0005] A rotary lever, which rotates in conjunction with loading and unloading of a disk cartridge, has a rotary lever on the front side of the recording / reproducing apparatus, substantially above the shutter of the disk cartridge mounted on the holder of the recording / reproducing apparatus. In addition, the front end is provided on the rear surface side of the apparatus, and an engaging portion for engaging with the front end is provided on the shutter of the disk cartridge. With the insertion of the disk cartridge, the rotating lever is turned. The shutter is automatically opened while being moved, and the shutter is automatically closed by the urging force of a spring stretched between the rotating lever and the holder when the disc cartridge is ejected.

[0006]

However, when such an automatic shutter opening / closing mechanism is applied to a magneto-optical recording / reproducing apparatus, the magneto-optical recording / reproducing apparatus sandwiches a disk in a disk cartridge mounted on a holder. Since it is necessary to dispose the bias magnet substantially above the shutter so as to face the optical pickup, it is difficult to dispose the rotating lever for opening and closing the shutter substantially above the shutter.

Further, as described in Japanese Patent Application Laid-Open No. 61-160861, in order to smoothly insert a disk cartridge, a bias magnet needs to be configured to be vertically movable with respect to a holder. The configuration was complicated, and the height (thickness) of the device could not be reduced and the device could not be made compact.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention is configured so that the shutter is fully opened during the insertion of the disc cartridge into the holder, so that the bias magnet is attached to the holder. It is an object of the present invention to provide a magneto-optical disk recording / reproducing device which can be fixedly arranged.

That is, the magneto-optical disk recording / reproducing apparatus according to the present invention comprises a disk cartridge having a magneto-optical disk housed therein and a movable shutter for closing an opening for exposing the magneto-optical disk to the outside. A removable holder, fixedly disposed on the holder, facing an opening formed on one surface side of the disk cartridge mounted on the holder, and facing one of the magneto-optical disks in the disk cartridge; The shutter is completely opened by a bias magnet arranged close to the surface side and an insertion stroke until the disk cartridge inserted into the holder reaches a half load position close to the bias magnet, and then the disk cartridge is continuously opened. Reaches the mounting position where it is completely mounted on the holder A shutter opening / closing mechanism for keeping the shutter completely open during the insertion stroke, and a magneto-optical disk in the other side of the magneto-optical disk in the disk cartridge mounted on the holder. An optical head disposed opposite to the bias magnet, a base on which a spindle motor for rotating and driving the magneto-optical disk is mounted, and when the disk cartridge is completely mounted on the holder,
It has a moving mechanism for relatively moving the holder and the base close to each other.

[0010]

The shutter opening / closing mechanism operates when the disc cartridge is inserted into the holder, and opens the shutter. The shutter is completely opened in the first half of the insertion stroke of the disk cartridge, that is, when the disk cartridge is half-loaded to a position close to the bias magnet. While the disk cartridge is further inserted from the half load and is completely mounted on the holder, the fully opened state of the shutter is maintained.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

First, a disk cartridge used in this embodiment will be described with reference to FIGS. 1 to 4 from which a shutter is removed. This disk cartridge 1 is a magneto-optical disk (hereinafter simply referred to as a disk).
2 is housed in a relatively flat hard jacket 3 made of hard plastic or the like having a substantially cubic shape.

The disk 2, which is a magneto-optical disk, is of a so-called double-sided type. A circular opening 4 (FIG. 18) is formed in the center of the disk 2, and a ring-shaped opening 4 is formed so as to surround the opening 4. Convex portions 5 are provided on both sides of the disk 2. A magnetic plate 6 made of steel or the like is mounted in the ring-shaped convex portion 5 while being slightly separated from the disk surface. A circular spindle shaft insertion hole 7 is provided at the center of the magnetic plate 6.
When the disk cartridge (hereinafter simply referred to as “cartridge”) 1 is completely mounted in the recording / reproducing apparatus and the intended recording / reproducing operation can be performed (hereinafter simply referred to as “loaded state”), the spindle shaft of the motor is inserted into the cartridge. It is configured to be inserted into the insertion hole 7 on the lower surface side (FIG. 18).

On the other hand, the hard jacket 3 is formed by joining an upper half 3a and a lower half 3b made of hard plastic or the like with screws. A circular spindle opening 9 is formed at the center of each of the upper half 3a and the lower half 3b, and ring-shaped convex portions 10 (FIG. 18) are formed so as to protrude inward so as to surround the spindle opening 9. Have been. The projecting depth of the convex portion 10 is determined so as to give a slightly larger interval than the thickness of the disk 2 in the assembled state of the hard jacket 3, and thus the disk 2 is formed within the hard jacket 3.
It is housed while being allowed to move slightly up and down in a state of being sandwiched therebetween. Until the peripheral end of the disk 2 contacts the inner surface of the hard jacket 3, the disk 2 is allowed to move in the lateral direction by the difference in dimension. Such rattling in the hard jacket 3 of the disk 2 is caused to move up and down by the rotor portion of the motor entering the spindle opening 9 and abutting against the lower surface of the disk 2 in a loaded state as described later. When the spindle shaft is inserted into the insertion hole 7, the lateral movement is regulated, and the positioning is firmly performed.

Hereinafter, the structure of the hard jacket 3 in an assembled state in which the upper half 3a and the lower half 3b are housed while accommodating the disk 2 will be described. First, a shutter mounting portion 11 for slidably mounting a shutter to be described later is formed as a relatively large concave portion having a depth substantially corresponding to the thickness of the shutter, on the front end side of the upper surface of the hard jacket 3 before mounting. Guide means 12 for allowing the shutter to slide in the lateral direction are formed at the rear end and the front end of the shutter mounting portion 11, respectively.

The guide means 12 has a ridge 12a formed linearly on the rear end side so as to be in sliding contact with the inner surface of the shutter, and a substantially rectangular shape for exposing the recording / reproducing portion 8 of the disk 2 at the front end side. The protrusions 12b and 12c are formed substantially linearly on both sides of the pickup mechanism opening 13 and are also configured to slide on the inner surface of the shutter.

On the rear end side of the upper surface of the hard jacket 3, a label 14 for displaying the recorded contents on the disk 2 and the like is provided.
Is affixed.

The cartridge 1 according to the present embodiment is provided with a recording error erasure prevention means 15, which is provided with a write protector 17 movable in a long hole 16 formed on the upper surface of the hard jacket 3 at a position shown in the figure. A light-emitting element and a light-receiving element (both not shown) arranged in the recording / reproducing apparatus main body so as to face the write protection hole 18 in a loaded state so as to close the write protection hole 18 formed on the lower surface. Between the two, allowing normal recording and playback in this case,
When the write protector 17 is moved downward from the position shown in the figure to open the write protection hole 18, the light from the light emitting element does not reach the light receiving element to prevent new recording. Reference numeral 19 denotes a write protection hole for the lower surface. Reference numeral 20 denotes a reference hole for positioning the cartridge 1 at a predetermined position in the loaded state. Since the recording error erasure prevention means 15 is not directly related to the present invention and its configuration is publicly known, a more detailed description will be omitted.

Since the cartridge 1 in this embodiment is of a double-sided type as described above, the configuration on the lower surface of the hard jacket 3 is basically the same as the configuration on the upper surface described above, and the same members are the same. Are given.

The lower surface side of the hard jacket 3 is different from the above-described structure on the upper surface side in the shutter guide means 12, and the shutter guide means 12 on the lower surface side is different.
A projection 12d formed linearly on the rear end side and slidably in contact with the inner surface of the shutter; and a guide groove 12e for receiving and guiding a guide pin (described later) planted on the lower surface of the shutter on the front end side. 12f and pickup opening 1
3 are formed on both sides of the shutter 3 in a substantially linear shape, and are formed with ridges 12g and 12h which are slidably in contact with the inner surface of the shutter.

A notch 21 is formed near the rear ends of both side surfaces of the cartridge 1, and an engagement protrusion 22 having an inclined surface is provided on the rear end side in the notch 21. The front end surface of the cartridge 1 is composed of a plurality of surfaces at different levels, that is, the highest surface 22a on the side of the ridge 12b on the upper surface and the lower surface facing the surface 22a with the groove 23 interposed therebetween. Surface 22b provided at a lower level than surface 22a
And a surface 22c constituting a front end surface of the pickup opening 13
And the lowest level surface 22d on the side of the ridges 12c to 12h. Surface 2 rather than surface 22a
The reason why 2b is set to a lower level is to allow a bent portion of the shutter described later to move during sliding of the shutter, and the groove 23 is formed between the surfaces 22a and 22b. This is because a spring described later is passed through the groove 23.

Since the cartridge 1 according to the present embodiment has the above-described front end surface configuration, this is indicated by an arrow A in FIG.
Surface 22a always slides in the insertion direction
This is particularly important in the automatic opening / closing operation of the shutter as described later.

The width (l ₁ ) of the surface 22c is formed so as to correspond to the thickness (l ₂ ) (FIG. 18) of the disk 2 accommodated in the hard jacket 3, and therefore, in the front view of FIG. The disk 2 is hidden behind the front end portion 22c and cannot be seen.

1 to 4, the cartridge 1
Although the shutter has been removed to show the configuration of the hard jacket 3 itself, the hard jacket 3 is made of steel, aluminum, synthetic resin, or the like as shown in FIGS. A shutter 24 that is bent in a U-shape is attached so as to be slidable in the lateral direction.

A relatively large shutter window 25 is formed on both the upper and lower surfaces of the shutter 24, and a front end face connecting the upper and lower surfaces forms a narrow portion 26 at a portion sandwiched between the shutter windows 25. The width (l ₃ ) of the narrow portion 26 is equal to the width (l ₁ ) of the central portion 22c of the front end face of the hard jacket 3 and the thickness (l ₂ ) of the disk 2. On both sides of the front end face of the shutter 24, a cutout portion 27 having an important meaning in relation to a shutter automatic opening / closing mechanism described later is formed at one end, and a bent portion 28 bent inside is formed at the other end. ing. The bent portion 28 moves on the shutter sliding surface 22b as described above.

FIGS. 5 and 6 show a state where the shutter 24 is in the closed position. The spring 30 has a fixed fulcrum at one side end at the front end of the hard jacket 3 and the shutter 2.
Both ends are supported by an engaging claw 29 formed by being folded inward near the bent portion 28 on the front end surface of the hard jacket 3, and bridged in a groove 23 formed on the front end surface of the hard jacket 3. The spring 30 constantly urges the shutter 24 to keep it in the closed position. When the shutter 24 is in this closed position, the shutter window 2
5 does not match the position of the pickup mechanism opening 13 in the hard jacket 3, and the pickup mechanism opening 13 is concealed by the upper and lower surfaces of the shutter 24.
Contamination or damage to the disk surface when the cartridge is not used is avoided.

Guide pins 31, 31 erected upward from near the front end on the lower surface side of the shutter 24.
(FIG. 9) is inserted into the guide grooves 12e and 12f formed on the lower surface of the hard jacket 3 as described above, and applies a sufficient force to the shutter 24 against the spring 30 to thereby guide the guide pin 31. , 31 are the guide grooves 12
e, 12f, and the upper and lower surfaces of the shutter are projected ridges 12a, 12b, 12c, 12d, 12g, 12
h, the shutter 24 is slid laterally.

Thus, when the shutter 24 is slid laterally (leftward in the drawing) from the closed position shown in FIGS. 5 and 6, and the guide pins 31, 31 reach the ends of the guide grooves 12e, 12f, the shutter 24 is opened. I take the.
7 to 10 show such a state. The shutter window 25 is shaped so as to completely open the spindle opening 9 and the pickup opening 13 formed in the hard jacket 3 at the shutter open position.

As described above, the width (l ₁ ) of the central portion 22c on the front end surface of the hard jacket 3 is equal to the thickness (l ₂ ) of the disk 2, and further, the width (l ₂ ) of the narrow portion 26 of the shutter 24 l ₃ ), the disc 2 opened at the shutter open position and the center plane 22c
The shutter 2 and the shutter narrow portion 26 are all arranged flush with each other. In the front view of the cartridge in this shutter open position (FIG. 8), the disc 2 and the center surface 22c are hidden behind the shutter narrow portion 26. Can not.

The configuration of a magneto-optical recording / reproducing apparatus used in connection with the cartridge 1 having the above-described configuration will be described below with reference to FIGS. Since the recording / reproducing apparatus of this embodiment is symmetrical about the center line in the cartridge insertion direction, in the following description, for convenience, one of the members arranged symmetrically is mainly described, and only one side is shown.

Referring particularly to FIGS. 11 to 13, the main chassis 40 substantially constitutes the outer surface of the rectangular parallelepiped device body, and the side surface is integrally extended upward near the right end (FIG. 12). The upper end thereof is bent inward to form a board mounting portion 41 for screwing a circuit board (not shown). Although the upper surface of the main chassis 40 is open, the holder lower plate 4 covers the open surface.
2 (FIGS. 14 to 16) are mounted and fixed to the main chassis 40 by appropriate means such as screwing or hooking.

A relatively large access window 43 is formed in the center of the holder lower plate 42 to enable the pickup mechanism and the spindle to access the disk 2 when the cartridge 1 is loaded. The cut surface is bent into an L-shape above the access window 43 to form a bias magnet mounting plate 44, and a bias magnet 55 formed by winding a coil 54 around an E-shaped core 53 is fixedly mounted on the lower surface of the mounting plate 44. It is configured. When the cartridge 1 is in the loaded state, the bias magnet 55
To form a magnetic field.

The holder lower plate 42 is further formed with a pair of first slot 45, second slot 46, and third slot 47, respectively, symmetrically with respect to the center line in the cartridge insertion direction.

As is clear from FIG. 14 and the like, the first slot 45 is formed linearly in the cartridge insertion direction near the outer end of the holder lower plate 42, and is located substantially at the center of the holder lower plate 42. Extending from the illustrated left end 45a to the illustrated right end.

The second slot 46 is formed substantially inward of the first slot 45 at the center of the holder lower plate 42, and extends parallel to the first slot 45 along the insertion direction from the right end 48a to the left end 48b in the drawing. The straight portion 48 extends to the required length up to the required length, and a crescent-shaped portion 49 formed continuously with the left end 48b of the straight portion 48. The crescent-shaped opening portion 49 is provided with a pivot pin 114 press-fitted into the tip of the slide portion 113 when the slide portion 113 that can slide on the first slot 45 described later is located at the left end. An arc-shaped cut 49a having a radius corresponding to the distance between the center and the left end 48b of the linear opening 48 of the second slot 46, and a linear first cut 49b connecting the both ends thereof, and a second cut 49b. And a step 49d formed between them so that the cutout 49c and the second straight cutout are slightly retracted from the first straight cutout in the mounting direction.

The third slot 47 is the first slot 45
A linear portion 47a extending in parallel with the second slot 46 and a second slot 46 and an enlarged portion 47b formed at the left end in the figure.

The holder lower plate 42 has a side end bent upward to form a holder side plate 50, and furthermore, an upper end of the holder side plate 50 is bent inward to form a holder upper plate 51. Thus, the holder lower plate 42, the side plate 50, and the upper plate 51 provide a space for inserting the cartridge 1 and an insertion port 52. An attachment plate 50a made of a synthetic resin or the like for facilitating attachment / detachment of the cartridge 1 is attached to the inside of the holder side plate 50.

In the recording / reproducing apparatus according to the present embodiment, when the cartridge 1 is positioned in the inserted state, the position of the cartridge is held as it is, and the spindle motor and the pickup mechanism are raised from the standby position below the apparatus to the operating position. It is configured to perform desired recording and reproduction.

Referring again to FIGS. 11 to 13, a base surface 58a on which spindle motor 56 and pickup mechanism 57 (FIGS. 17 and 18) are fixedly mounted, and side surfaces 58b formed upright at both ends thereof. Flange 58c extending outward from a part of the upper end of the side surface
The base plate 58 mainly composed of
The pivot shaft 5 is attached to the rear surface of the main chassis 40 at the rear end.
9 so that the entire base plate 58 can be selectively set between the standby position and the operating position by being rotated about the rotation shaft 59. is there.

FIGS. 11 to 13, 17 and 18 show a state in which the base plate 58 is in the operating position. In this operating position, the base surface 58a of the base plate 58 is located.
Is positioned horizontally so that the spindle shaft 69 of the spindle motor 56 mounted thereon is oriented strictly vertically with respect to the cartridge 1 in the loaded state.

A means for holding the mounted cartridge 1 at a predetermined position is formed on the flange portion 58c of the base plate 58. The positioning means includes a pair of first reference pins 60 implanted substantially at the center and a pair of second reference pins 61 implanted near the insertion port.
And a pair of leaf springs 70 attached to both side ends of the holder upper plate 51.

The first reference pin 60 is mounted together with a leaf spring 70 for placing the leading end of the cartridge 1 in the loaded state thereon and pressing the cartridge downward from the opening 51a of the holder upper plate. Regulates unwanted vertical movement of the cartridge.

The second reference pin 61 is inserted into the reference hole 20 formed at the rear end of the cartridge 1 in the loaded state, and regulates the unwanted movement of the cartridge 1 in the horizontal direction. An O-ring 62 made of rubber or the like is attached to the lower part of the second reference pin 61, and the holder lower plate 42 is mounted thereon.

[0044] 3 consisting of the spindle motor 56 is a magnet 64 ₁ which is magnetized into six coils 63 and eight poles as demonstrated in Figure 13 for example, to be placed near the tip on the substrate surface 58a of the base plate 58 It is a phase motor. Coil 63
Are connected in series such that two opposing coils flow in the same direction. The coil 63 is provided on the substrate 65
6 is ring set on the periphery of, and the magnet 64 ₁ is secured to the lower surface of the rotor 67 with respect to these fixing members, bearing 6
8, a spindle shaft 69 inserted into the base 66
Can be rotated with

In the loaded state of the cartridge 1, the strict position control is performed by the reference pins 60 and 61 as described above. However, the strict position control for the disk 2 accommodated in the cartridge 1 with some play is also performed. is important. In this embodiment, the upper surface of the rotor 67 enters the spindle opening 9 of the cartridge 1 and contacts the lower surface of the disk 2 to regulate the vertical position.
By being inserted into the inside, the axes are aligned and the horizontal position is regulated. Also by the magnets 64 ₂ attached to the magnetic plate 6 and the rotor 67, the disc 2 is adsorbed and fixed to the rotor 67.

It should be noted that the above-described spindle motor is known as a flat motor, and its own structure does not constitute a feature of the present invention. Anything that can perform an operation can be used instead of the one shown.

The pickup mechanism 57 mounted substantially at the center of the base plate 58 has a laser diode, a polarizing plate, a beam splitter and the like when the base plate is in the operating position, as clearly shown in FIGS. A laser beam is emitted from an optical system 71 composed of a laser beam in parallel with the cartridge mounting direction, and this laser beam is reflected vertically upward by a total reflection mirror (not shown) located below the objective lens 73, and The recording / reproducing unit 8 of the disk 2 in the cartridge 1 in the loaded state is irradiated with a laser beam spot.

Objective lens 73, focusing coil 74
Each of the tracking coils 75 is fixed to a holding plate 77 which is rotatable about a shaft 76 and is slidable up and down along the shaft. A yoke 79 and a magnet 80 are fixed on a pickup base 78 attached to the base plate 58, and a magnetic circuit composed of these is used also for focusing and tracking. The linear guide 81 is slidable in the cartridge mounting direction while being guided by a guide base 82 fixed on a base plate 58 by a linear motor having a coil 83 and a magnet 84. Accordingly, the pickup base 78 Is configured to slide.

Referring again to FIGS. 11 to 13, pins 8 projecting from flange portion 58c of base plate 58 to both sides are provided.
A spring 87 is bridged between the base plate 5 and the engagement claws 86 cut at both side ends of the bottom surface of the main chassis 40, and constantly biases the base plate 58 clockwise. Pin 85
, A guide roller 88 is rotatably fitted. The guide roller 88 has an important meaning in relation to the operation of the slide plate described below.

The slide plate 89 is formed integrally with the bottom portion 89a and the front end of the bottom portion 89a.
0, an operation portion 89b formed so that at least a part thereof always protrudes out of the apparatus from an opening formed below the front end surface, and a side surface portion 8 which stands vertically from both ends of a bottom surface portion 89a.
9c.

A slot 91 for receiving a pin 90 projecting from the bottom surface of the main chassis 40 is formed in the bottom surface portion 89a, and a pin 92 projecting inward from the side surface of the main chassis 40 is formed on the side surface portion 89c. A slide 93 is formed. A part of the slot plate bottom portion 89a is cut and raised to form an engagement protrusion 94, and the spring 95 is mounted between the engagement protrusion 94 and the pin 90, so that the slide plate 89 is always in the ejecting direction ( (Left direction in the figure). The slide plate 89 is configured to be slidable in the cartridge insertion direction while being guided by inserting the pins 90 and 92 into the slots 91 and 93, respectively.

Further, near the center of the slide plate side surface portion 89c, a pin 85 of the flange portion 58C of the base plate 58 is provided.
The guide roller 88 mounted on the base plate 58 is guided to
A guide groove 96 for achieving the movement from the operating position to the standby position or vice versa is formed by notching a substantially triangular shape from the upper end of the side surface portion, and a slide plate lock arm described later is formed near the rear end thereof. An engagement notch 97 for engaging one end to lock the slide plate 89 is formed.

The lock arm 98 for the slide plate is a substantially L-shaped member rotatably disposed around a pin 99 fixed to the side surface of the main chassis 40. One end of the lock arm 98 is provided in the engagement notch 97. An engagement pin 100 that can be inserted and engaged is implanted outward, and the other end is bent inward to form an engagement end 101. The lock arm 98 has one end locked to the bottom surface of the main chassis 40 and is constantly urged in a counterclockwise direction (FIG. 12) by a spring 102 wound around a pin 99.

Referring to FIGS. 14 to 16, a pair of pins 103 are provided behind access window 43 of holder lower plate 42.
a and 103b are planted, and a pair of interlocking arms 104a and 104b that can rotate around the pins are provided. These interlocking arms are rotatably mounted at their inner ends by connecting pins 105 that are not restrained by members other than the interlocking arms, so that the pair of interlocking arms 104a and 104b rotate completely in synchronization. Be moved.
That is, when one of the interlocking arms rotates by a certain angle about the pin 103a or 103b, the other interlocking arm is also driven to rotate in the opposite direction by the same angle about the other pin.

At the free ends of these interlocking arms, pushing pins 106 are erected, and the pushing pins 106 extend through the third slots 47 of the holder lower plate 42 and extend downward. Engagement end 10 of plate lock arm 98
1.

Further, a cartridge lock lever 108 mounted rotatably in the horizontal direction about a shaft 107 which is formed at both ends of the holder lower plate 42 near the cartridge insertion opening is positioned below the holder lower plate 42. The bar-shaped portion 108a thus formed and the engaging portion 108b formed so that its tip (the cartridge insertion port side) stands upright and enters the cartridge insertion space are integrated. The engaging portion 108b has a notch 21 formed near the rear end of the side surface of the cartridge loaded state.
To hold the cartridge 1 in the loaded state.

An engaging pin 109 is press-fitted into the rear end of the rod portion 108a of the lock lever and extends downward. One end is supported by the engaging pin 109 and the other end is engaged with the projection of the holder lower plate 42. The attached spring 110 is wound around the rotating shaft 107 and urges the lock lever 108 in a counterclockwise direction (FIG. 14).

The engagement pin 109 extends downward, and when the cartridge 1 is mounted at a predetermined position and the slide plate 89 is not locked to hold the base plate 58 in the operating position, as shown in FIG. The engagement pin 109 is in contact with the outer surface of the side portion 89c of the slide plate 89, and the lock lever engagement portion 108b is engaged with the cartridge notch 21 to maintain the loaded state. When the slide plate 89 is not loaded and the slide plate 89 is locked and the base plate 58 is at the standby position, as shown in FIG. 19, the slide plate 89 is in a position relatively moved to the right relative to the position in FIG. Therefore, the engaging pin 109 comes into contact with the contact surface 111 formed by extending forward while bending slightly inward from the front end of the side surface portion 89c. Minute only lock lever 108 is axis 1
As a result, the engagement portion 108b and the notch 21 are released from engagement with each other. When the cartridge 1 is not inserted, the lock lever 108 is retracted to a position where it does not hinder insertion of the cartridge, as is apparent from the above description.

The automatic shutter opening / closing mechanism of the cartridge will be described below with reference to FIGS. 14 to 16. This mechanism moves while rotating in the first slot 45 formed in the holder lower plate 42. Guide rollers 112a and 112b at both ends.
And a generally triangular member whose one end is pivotally supported by a pivot pin 114 press-fitted and implanted at the tip of the slide portion 113. The shutter opening / closing arm 115 is included.

Guide roller 112 of slide portion 113
A further guide roller 116 is provided between a and 112b so as to rotate while abutting on the inner side surface of the holder side plate 50, so that sliding on the holder lower plate 42 is smoothly performed. An inner extension 113a is integrally formed with the slide portion 113, and the apex 115a of the shutter opening / closing arm 115 comes into contact with the inside extension 113a so as to regulate the rotation angle of the arm 115.

A substantially triangular shutter opening / closing arm 11
5, two pins other than the mounting end of the pivot pin 114 are provided with a pin 117 inserted into a second slot 46 formed in the holder lower plate and a pin 1 inserted into a third slot 47.
18 are planted downward. Further, a locking pin 119 is provided integrally with the arm 115 at a distal end near the pin 117. Further, the spring 12 is disposed between the pin 118 and the projection cut and raised at the front end of the holder lower plate 42.
0 is stretched, and urges the arm 115 in a direction of being pulled back to the cartridge insertion port side. 14 through FIG.
Reference numeral 6 denotes a slide unit 113, an arm 115, and the like, assuming that a cartridge (not shown) is completely mounted.

Various operations when the above-described cartridge and recording / reproducing apparatus are used will be described in detail below.

FIGS. 19 to 22 show that the cartridge 1 has its front end inserted into the mounting space from the loading / unloading opening 52.
This shows a state in which the locking pin 119 implanted at one end of the shutter opening / closing arm 115 has engaged with the notch 27 formed at one side end of the front surface of the shutter 24. Hereinafter, this state is referred to as an eject state.

In the ejecting state, as is apparent from FIGS. 19 and 21, the cartridge lock lever 108 has been rotated counterclockwise until the engagement pin 109 comes into contact with the contact surface 111. The tip engaging portion 108b does not hinder the insertion of the cartridge. In the eject state, the base plate 58 occupies the standby position, and the motor 56 and the pickup mechanism 57 mounted thereon are retracted downward without projecting from the holder lower surface 42 into the cartridge mounting space. is there. Further, the slide plate lock arm 98, which is always rotating in the counterclockwise direction (FIG. 20) by the urging force of the spring 102, has the engaging pin 100 at its tip fitted into the notch 97 of the slide plate 89 in the ejected state. So that the slide plate 89 is
Is held in the right direction in the figure against the right. Flange 58
The pin 85 protruding outward from c is accommodated in the slide plate 89 at a lower portion below the guide groove 96. Interlocking arm 104
Of the lock arm 98 is lightly in contact with the engaging end 101 of the lock arm 98 in the ejected state.

When the cartridge 1 is further pushed in from the eject state, the cartridge 1 goes through a half-load state, which will be described later, to reach the loading state shown in FIGS. 23 to 26. In this loading state, a desired recording / reproducing operation is performed.

The shutter opening / closing arm 115 is first actuated to open the shutter 24 in conjunction with the state of the apparatus from the eject state to the half-load state and the loaded state with the insertion of the cartridge.

When the cartridge 1 is completely mounted, the pin 118 pushes the interlocking arm 104b counterclockwise by the operation of the shutter opening / closing arm 115 on the lower side in FIG. Rotate in the direction. As a result, the slide plate lock arms 98 on both sides are rotated clockwise, and the slide plate 89 is rotated.
And the slide plate 89 starts sliding in the loading / unloading direction. First, the cartridge lock lever 108 is rotated clockwise by sliding the slide plate 89 to hold the cartridge 1 in the loaded state, and the base plate 58 is raised while rotating around the rotation shaft 59,
The recording / reproducing operation on the disk 2 of the completely mounted cartridge 1 is enabled.

The series of operations for opening the shutter, raising the base plate, and locking the cartridge will be described with reference to FIGS.
This will be described with reference to FIG. FIGS. 27 to 34 show the position of each member related to the holder lower surface 42 from the eject state to the loaded state through the half-load state together with the position of the cartridge 1 and the opened state of the shutter 24 in order. is there.

FIG. 27 shows the position of each member when the apparatus is in the ejecting state shown in FIGS. 19 to 22, and this ejecting state is set at one end of the shutter opening / closing arm 115 as described above. Locking pin 11
9 (119A) is formed when the cartridge 1 is inserted until it just fits into the notch 27 formed at one side end of the front surface of the shutter 24.

At this time, one opening / closing arm 115A is in a state of being pulled toward the loading / unloading side by the urging force of the spring 120A, that is, the pin 117A is at the loading / unloading side end (starting end) of the slot 46A, and the pin 118A is also at the slot 47A. The slide portion 113A is drawn to the pin 114A, and the guide roller 112a is also located at the starting end 45a of the slot 45A on the loading / unloading side.

However, as described above, the front end surface of the cartridge 1 has a surface configuration in which the surface 22a on the opposite side is located forward in the insertion direction than the surface 22d on the side where the shutter notch 27 is formed. 27, the other locking pin 1 is in the ejected state shown in FIG.
19B is pushed by the leading surface 22a, and accordingly, the pin 117B is positioned slightly above the first linear cut 49b of the slot 46B.
8B also slightly moves in the slot 47B. Thus, the opening operation of the shutter 24 is performed by the arm 115.
It should be noted that the arm 115B, which is opposite to the arm A, is always rotated and advanced by the leading surface 22a of the cartridge 1 on the opposite side.

When the cartridge 1 is further pushed in from the eject state, the pin 117A of the arm 115A rotates counterclockwise around the pivot pin 114A while the pin 117A is inserted into the first linear cut 49b of the slot 46A. While being pressed, it is advanced against the spring 120A, and the shutter 24 is gradually slid laterally (downward in the figure) against the spring 30 (FIG. 5) with the rotation of the arm 115A.

In this way, the state shown in FIG.
In this state, the locking pin 119B of the arm 115B on the opposite side rides on the front surface of the shutter 24 via the bent portion 28 from the leading surface 22a. Since the bent portion 28 and the straight cutout 49b are substantially parallel to each other, it is difficult to rotate the arm 115B by the insertion operation of the cartridge 1. In order to smoothly rotate and advance the arm 115B at this time, a first linear cut 49b and a second linear cut 49c are provided.
And a step 49d is formed between
The pin 117B is configured to escape to the step 49d when the 19B rides on the bent portion 28.

As described above, if the operation of the arm 115B always precedes and further goes through the states of FIGS. 30 and 31,
The pin 117A of the arm 115A reaches the continuous end 48b of the crescent-shaped opening portion 49 and the linear portion 48 of the slot 46A, and the state shown in FIG. 32 is obtained.

During the transition from the ejected state to the state shown in FIG. 32, the pin 117A is connected to the first linear cutout 49b, the step 49d, and the second
Is moved while sequentially contacting the linear cut 49c of
During this time, the pivot pin 114A needs to be slightly loosened in order to maintain a constant distance from the pin 117A, and in order to allow this, a slide portion 113A rotatably connected to the pivot pin 114A is attached to the slot 45A. Is slightly slid along. At the same time, the pin 118A floats in the enlarged portion 47b of the slot 47A.

In the state shown in FIG. 32, the shutter 24 is completely opened, and the position of the shutter window 25 coincides with the positions of the spindle opening 9 and the pickup opening 13 of the cartridge 1 to expose the disc 2. Further, since the shutter 24 of the cartridge 1 is completely opened at the half-load stage, the narrow portion 26 and the central portion 22 of the cartridge 1 are opened.
c forms a recess that avoids the bias magnet 55. That is, when the shutter 24 is opened, the cartridge 1 comes into contact with the bias magnet 55 fixedly disposed at a slight distance of about 1 mm from the disk surface in the cartridge mounted on the holder of the recording / reproducing apparatus. And can be mounted later.

When the cartridge 1 is further pushed in from the half-load state of FIG. 32, the arm 117A pushes the pin 117A into the linear portion 48 of the slot 46A.
18A is guided by the linear portion 47a of the slot 47A, and the pivot pin 114A is
Along slot 45A with 13A and at vertex 1
The arm 115A is moved in parallel along the cartridge insertion direction while the angle of the arm 115A is restricted by the contact between the arm 15A and the inner extension 113a of the slide portion 113A. Thus, the state shown in FIG. 33 is reached through the state shown in FIG.

Arm 115A for performing shutter opening operation
The arm 115B on the opposite side is the arm 115A described above.
The same movement is always performed ahead of time. In the state of FIG. 34, the pin 118A of the arm 115A is
The pin 118B of the arm 115B that has not reached the end of 7A but is actuated earlier than this does not
B has already reached near the end of B
b) is pushed in the cartridge insertion direction. The other interlocking arm 104a is not directly operated by the pin 117A, but is operated by an interlocking mechanism including the pins 103a and 103b and the connecting pin 105.
It rotates in the opposite direction by the same angle in conjunction with the operation of 04b.

As a result, the interlocking arms 104a, 104
The push-down pins 106, which are respectively hung and implanted at the respective ends of the slide plate lock arm 98, are slightly moved in the cartridge insertion direction by the same stroke.
20 to rotate the lock arm 98 clockwise from the state shown in FIG. 20 in the ejected state against the spring 102, the engagement pin 100 is disengaged from the engagement notch 97 of the slide plate 89, and The lock is released.

The slide plate 89 is urged by a spring 95 so that a slot 91 for receiving the fixing pin 90 on its bottom surface 89a and a fixing pin 9 on its side surface 89c.
While being guided by the slot 93 for receiving the cartridge 2, it is horizontally slid in the direction opposite to the cartridge mounting direction (see especially FIGS. 11 and 12). As the slide plate 89 is slid in this direction, the base plate 58 (see FIG. 20), in which the pins 85 are accommodated deeply in the guide grooves 96 and whose movement is restricted and retracted to the lower standby position, Guide groove 9
The ascending movement while rotating clockwise about the axis 59 along the inclined surface of No. 6 leads to the operating position as shown in FIGS. The desired recording / reproducing operation can be performed at this operating position.

As the slide plate 89 is unlocked in the manner described above and slides in the direction opposite to the cartridge insertion direction, the cartridge locking operation is performed. That is, when the slide plate 89 is locked, as shown in FIGS.
08 is an engagement pin 10 on the inner contact surface 111 of the slide plate.
9 is engaged, and the leading end engaging portion 108b is in a state of being released outward from the side surface of the cartridge, but when the lock on the slide plate 89 is released and slides in the direction opposite to the cartridge inserting direction, the spring 110 Against the bias of
An engaging pin 109 is provided from the contact surface 111 to the front end of the side portion 89c.
Are rotated in the clockwise direction around the shaft 107 by the amount of the movement, and the leading end engaging portion 108b enters the notch 21 formed at the rear end of the cartridge 1,
The cartridge 1 is held in the mounted state.

The base plate raising operation is performed slightly after the holding operation of the cartridge 1. That is, as the slide plate 89 is further slid, the base plate 58, which is accommodated deeply in the guide groove 96 and whose movement is restricted and retracted to the lower standby position, is moved to the guide groove 96.
23, while being rotated clockwise about the axis 59 along the inclined surface, the ascending movement is performed to reach the operating position as shown in FIGS. The desired recording / reproducing operation can be performed at this operating position.

As described above, the shutter opening operation is completed during the insertion, and the cartridge lock operation is performed when the cartridge is further inserted and pushed completely to the mounting position. Immediately after this operation is completed, the base plate is lifted. The movement is performed, and the loaded state shown in FIGS. 23 to 26 is formed.

After the desired recording / reproducing operation has been performed in the loaded state, the operation of ejecting the cartridge 1 is performed by manually pushing the operating portion 89b of the slide plate 89 projecting out of the apparatus, and pressing the slide plate against the spring 95. This is performed by sliding the 89 in the cartridge insertion direction.

As a result, first, the pin 85 (guide roller 88) of the flange portion 58c of the base plate 58 is moved while being pressed obliquely downward along the inclined surface of the guide groove 96 of the slide plate 89, so that it opposes the spring 87. Then, the base plate 58 is rotated counterclockwise to retract to the standby position.

When the slide plate 89 further slides, the operation opposite to the above-mentioned operation is performed on the cartridge lock lever 108, and the engagement of the distal end engaging portion 108b with the cartridge notch 21 is released, thereby releasing the cartridge lock. . Further, sliding of the slide plate 89 is continued until the engagement pin 100 of the lock arm 98 is fitted in the engagement notch 97, whereby the slide plate 89 is locked in the inoperative position by the lock arm 98.

When the cartridge lock is released,
A spring 120 is stretched between a pin 118 of the shutter opening / closing arm 115 and the holder lower plate 42 to form the arm 1.
15 is pulled back in the direction opposite to the cartridge insertion direction, the cartridge 1 is ejected, and the shutter is closed by the rotation of the locking pin 119.

Arm 1 at the time of this cartridge ejection
Numeral 15 is a reverse movement of the above-described insertion operation from the mounting state in FIG. 34 to the half-load state in FIG. 32, and the parallel movement is guided by the slots 45, 46 and 47.

However, from the half load state of FIG. 32,
Without taking the positions shown in FIGS. 31 to 28, the arm 115A is turned clockwise around the pivot pin 114 at once and the arm 115B by the urging force of the spring 120.
Rotates counterclockwise and returns to the eject state of FIG. This is because the pivot pin 114 cannot move at the leftmost end of the movement path in the half-load state shown in FIG.
9b, 49c and the step 49d, without merely abutting along the arcuate cut 49a, the pin 1
This is because it is only rotated about 14.

Although the above description has been made on the case where one side of the cartridge is used, it should be noted that the cartridge in this embodiment can be used on both sides and has a configuration corresponding thereto. For example, the automatic shutter opening / closing mechanism is completely symmetrical with respect to the center line in the cartridge insertion direction at the top of the apparatus. Therefore, FIG.
When the cartridge is inserted upside down to use the disk surface opposite to that shown in FIGS. 7 to 34, the shutter notch 27 engages with the locking pin 119B of the arm 115B, and the movement of the other arm 115A Will precede.

The present invention can take various aspects without being limited to the above embodiments. For example, the second slot 4
The arc-shaped cut portion 49a and the linear portion 48 of the crescent-shaped portion 49 of FIG. Not done. It is apparent that the same pin can be used for the locking pin 119 (first engaging portion) and the pin 117 (second engaging portion).

[0092]

According to the present invention, the shutter of the magneto-optical disk cartridge is fully opened at the half-load position, and thereafter the shutter is fully opened until it reaches the fully mounted position. Therefore, the bias magnet is fixedly disposed on the holder. The configuration of the apparatus can be simplified and the apparatus can be made compact.

[Brief description of the drawings]

FIG. 1 is a top view showing a configuration of a magneto-optical disk cartridge that can be used in an embodiment of the present invention, showing a state where a shutter is removed.

FIG. 2 is a front view showing the disk cartridge with a shutter removed.

FIG. 3 is a bottom view showing the disk cartridge with a shutter removed.

FIG. 4 is a bottom perspective view showing the disk cartridge with a shutter removed.

FIG. 5 is a top view showing the disk cartridge when the shutter is closed.

FIG. 6 is a front view showing the disk cartridge when the shutter is closed.

FIG. 7 is a top view showing the disk cartridge when the shutter is open.

FIG. 8 is a front view showing the disk cartridge when the shutter is open.

FIG. 9 is a bottom view showing the disk cartridge when the shutter is open.

FIG. 10 is a bottom perspective view showing the disk cartridge when the shutter is open.

FIG. 11 shows a configuration of a magneto-optical disk recording / reproducing apparatus according to an embodiment of the present invention used in connection with the disk cartridge of FIGS. 1 to 10, wherein a main chassis, a slide plate, and a base of the apparatus at a cartridge loading position; It is a top view which shows a board and members related thereto.

12 is a side view showing a part similar to that of FIG.

FIG. 13 is a front view showing the same members as in FIGS. 11 and 12;

FIG. 14 is a top view showing a cartridge holder, a shutter automatic opening / closing mechanism, a cartridge locking mechanism, and the like in the magneto-optical disk recording / reproducing apparatus according to the embodiment.

FIG. 15 is a side view showing a part similar to that of FIG.

FIG. 16 is a front view showing members similar to those in FIGS. 14 and 15;

FIG. 17 is a top view of the magneto-optical disk recording / reproducing apparatus according to the embodiment, showing the cartridge at the cartridge loading position, the base plate, and the motor and pickup mechanism arranged thereon independently.

FIG. 18 is a side view showing members similar to those in FIG. 17;

FIG. 19 is a top view showing the magneto-optical disk recording / reproducing apparatus in an ejected state together with a cartridge, with a motor and a pickup mechanism removed.

FIG. 20 is a side view showing a state similar to FIG. 19;

FIG. 21 is a top view showing the magneto-optical disk recording / reproducing apparatus in an ejected state, with a slide plate, a slide plate lock mechanism, and a pickup mechanism removed, together with a cartridge.

FIG. 22 is a side view showing a state similar to FIG. 21.

FIG. 23 is a top view showing the magneto-optical disk recording / reproducing apparatus in a cartridge loaded state, with the motor and the pickup mechanism removed, together with the cartridge.

FIG. 24 is a side view showing a state similar to FIG. 19;

FIG. 25 shows the magneto-optical disc recording / reproducing apparatus in a cartridge loaded state in which a slide plate, a slide plate lock mechanism, and a pickup mechanism are further removed.
FIG. 4 is a top view showing the cartridge together with the cartridge.

FIG. 26 is a side view showing a state similar to FIG. 21.

FIG. 27 is a top view showing a step-by-step operation of the automatic shutter opening / closing mechanism upon insertion of a cartridge in the magneto-optical disk recording / reproducing apparatus, showing a shutter closed state.

28 is a top view showing a state where the shutter is slightly opened from the closed state in FIG. 27.

FIG. 29 is a top view showing a state where the shutter is slightly opened from the state of FIG. 28;

FIG. 30 is a top view showing a state where the shutter is slightly opened from the state of FIG. 29;

FIG. 31 is a top view showing a state where the shutter is slightly opened from the state of FIG. 30;

FIG. 32 is a top view showing a state in which the shutter is further opened from the state of FIG. 31 and the cartridge is completely opened and at the time of cartridge half loading.

FIG. 33 is a top view showing a state where the cartridge is further inserted from the state of FIG. 32;

FIG. 34 is a top view showing a loaded state in which a cartridge is further inserted from the state shown in FIG. 33;

[Explanation of symbols]

 1 Magneto-optical disk cartridge 2 Magneto-optical disk 24 Shutter 40 Main chassis 55 Bias magnet 56 Spindle motor 57 Pickup mechanism 58 Base plate 89 Slide plate

Claims (1)

(57) [Claims] 1. A magneto-optical disk is housed therein.
A holder capable of mounting and dismounting a disk cartridge having a shutter movable to close an opening for exposing the magneto-optical disk to the outside; and a holder fixedly disposed in the holder and mounted on the holder. A bias magnet that faces the opening formed on one surface side and is disposed close to one surface side of the magneto-optical disk in the disk cartridge; and the disk cartridge inserted into the holder is close to the bias magnet. The shutter was completely opened by the insertion stroke up to the half-load position, and then the shutter was completely opened during the insertion stroke up to the mounting position where the disc cartridge was completely mounted in the holder. Shutter opening and closing mechanism to keep the An optical head which is located on the other surface side of the magneto-optical disk in the disk cartridge mounted on the slider, and which is arranged to face the bias magnet with the magneto-optical disk interposed therebetween; and a spindle motor which rotationally drives the magneto-optical disk And a moving mechanism for relatively moving the holder and the base closer to each other when the disc cartridge is completely mounted in the holder. Magnetic disk recording and reproducing device.