JPH07210911A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To surely position a mounting base by elastically pressing its front part onto front positioning members and elastically pressing its rear part onto rear positioning members when the mounting base comes to a loading position. CONSTITUTION:A chassis opening 36 is formed over the entire surface of a loading chassis 26 in the state of communicating with a bezel opening and a magneto-optical disk moves into and out of a magnetic disk device through the opening 36. The front part of the magnetic mounting base is pressed onto the front position regulating members 26f, 26g mounted at the loading chassis 26. The rear part is pressed onto the rear position regulating pins 24a, 24b erected on the optical head mounting base 24, by which the part is regulated to the position in the perpendicular direction of the magnetic head mounting base. Wire springs are used as energizing means or pressing pieces which are respectively integrally formed at control cam members and which themselves have elastic force are used.

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 device capable of repeatedly recording information on a magneto-optical disk, and more particularly to a cartridge holder for receiving a disk cartridge for rotatably accommodating the magneto-optical disk. And a magnetic head for moving information between a cartridge loading position where information can be read / written by an optical head, and a magnetic head is placed close to a magneto-optical disk at a standby position set above the cartridge receiving position and a cartridge loading position. The present invention relates to a magnetic field modulation overwrite type magneto-optical disk device movably provided with respect to a magnetic head load position.

[0002]

2. Description of the Related Art For example, a magneto-optical disk device capable of repeatedly recording information on a magneto-optical disk continuously emits a laser beam of high power emitted from an optical head toward a recording layer of a loaded magneto-optical disk. After converging, the temperature is raised to the Curie temperature, and in this temperature rising state, a bias magnetic field is applied by a magnetic head as a bias magnetic field generator, and after the magnetization direction of the magnetic body is aligned in the same direction as at initialization, The bias magnetic field is reversed to intermittently converge a laser beam having a large power on the recording layer, whereby the direction of magnetization is reversed and information is recorded.

In the magneto-optical disk device having such a conventional structure, in order to rewrite information of one track, the magneto-optical disk needs to be rotated for erasing and recording respectively, which causes a disadvantage of slow recording speed. . Therefore, recently, by selectively applying a magnetic field of either S pole or N pole to a minute region corresponding to a region where laser light is converged, information is rewritten by rotating the magneto-optical disk once. A magnetic field modulation overwrite type magneto-optical disk device capable of doing so has been proposed.

[0004]

In such a conventional magnetic field modulation overwrite type magnetic head floating type magneto-optical disk apparatus, the magnetic head is at the magnetic head load position and the recording surface of the magneto-optical disk. The vertical position must be accurately set so that it is located slightly above the upper surface of the recording medium, in other words, it is separated from the upper surface of the recording surface only by a small distance. Therefore, a configuration is adopted in which the magnetic head mounting base to which the magnetic head is mounted is brought into contact with the vertical positioning member while being brought to a position corresponding to the magnetic head loading position. However, if the contact state is unstable, the magnetic head mounting base may be separated (float) from the corresponding vertical positioning member. In this case, the magnetic head load position is regulated only when it is unstable. It was not done, and improvement was requested.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a magneto-optical disk device capable of positioning the magnetic head in a state in which the vertical position is reliably held. Is to do.

[0006]

In order to solve the above-mentioned problems and to achieve the object, a magneto-optical disk device according to the present invention, according to a first aspect of the invention, is provided with an optical head and a magnetic head. In a magneto-optical disk device capable of repeatedly recording information on a magneto-optical disk, between a cartridge receiving position for receiving a disk cartridge inserted in the device and a cartridge loading position where information can be read / written by the optical head, A cartridge holder movable along a direction orthogonal to the insertion direction of the disc cartridge, and a cartridge holder in which the magnetic head is movably attached along the radial direction of the magneto-optical disc, A position separated from the optical head along the moving direction of the cartridge holder In a direction parallel to the moving direction of the cartridge holder, between a certain standby position and a magnetic head loading position that brings the magnetic head closer to the magneto-optical disk in the disk cartridge held by the cartridge holder at the cartridge loading position. A magnetic head mounting base that is movable along the same, a front positioning member that abuts in a state in which a front portion of the magnetic head mounting base located upstream in the insertion direction is brought to a magnetic head loading position, and the magnetic head A rear positioning member that abuts in a state where a rear portion of the mounting base located downstream in the insertion direction is brought to the magnetic head loading position; and a state where the magnetic head mounting base is brought to the magnetic head loading position. , The front part of this is elastic on the front positioning member Together it is brought into contact, and characterized by comprising a biasing means for resiliently abutting it of the rear portion on the rear positioning member.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of a magneto-optical disk device according to the present invention will be described in detail below with reference to the accompanying drawings.

First, the magneto-optical disk apparatus 10 of this embodiment is a magnetic field modulation overwrite type magneto-optical disk apparatus, and as shown in FIGS. The magneto-optical disk 12 shown in FIGS. 5 and 6 can be automatically loaded (loaded) and automatically ejected (unloaded) while the inner space in which the magnetic disk 12 is loaded is sealed. still,
In this magneto-optical disk device 10, when rewriting the information of one track, a magnetic field of S or N is selectively applied to a minute region corresponding to the region where the laser light is converged, A so-called magnetic field modulation overwrite system is adopted in which information can be rewritten by rotating the magneto-optical disk 12 once.

Therefore, the magnetic head 14 as a magnetic field generator, which will be described later, applies a modulation magnetic field toward the recording layer of the loaded magneto-optical disk 12, and a large amount of power is emitted from the optical head 16, which will be described later. The laser light is continuously converged, whereby the direction of magnetization is reversed and information is recorded (or overwritten).
As a result, so-called initial work is not required, and high-speed information recording is possible.

Next, the external structure of the magneto-optical disk device 10 will be described with reference to FIGS.

The magneto-optical disk device 10 has an appearance that a pair of left and right main frames 18 having a base portion 18a and an upright portion 18b are formed in a substantially L-shaped side surface, and the upright portions 18b of both main frames 18 are in front of each other. A front bezel 22 attached via an attachment mechanism 20 described later in
An optical head mounting base 24 (detailed later) fixed on the upper surfaces of the bases 18a of both main frames 18, a loading chassis 26 (detailed later) fixed on the optical head mounting base 24, and An upper cover 28 that is mounted on the loading chassis 26 and covers the upper surface of the loading chassis 26 in a closed state, a rear cover 30 that closes the rear openings formed over the optical base 24 and the loading chassis 26, and the bases of both main frames 18. 18
The control chamber rear cover 32 is provided for closing the rear face of the control chamber defined by the space sandwiched by a and a bottom plate (not shown) for closing the bottom face of the control chamber.
The main frame 18, the loading chassis 26, the upper cover 28, the rear cover 30, and the control chamber rear cover 32 define a housing that constitutes the outer surface of the magneto-optical disk device 10.

Here, in order to insert and remove the magneto-optical disk 12 into and out of the magneto-optical disk device 10, a bezel opening 34 is formed in the front bezel 22 as shown in FIG. 1, and a loading chassis as shown in FIG. A chassis opening 36 is formed on the front surface of 26 so as to communicate with the bezel opening 34. In this way, the magneto-optical disk 12 is inserted into and removed from the magneto-optical disk device 10 through the bezel opening 34 and the chassis opening 36. still,
The bezel opening 34 and the chassis opening 36 extend in the horizontal direction as shown in the figure, and when the magneto-optical disk 12 is inserted along the horizontal direction, that is, when the magneto-optical disk 12 is rotated about the vertical axis, Although the disk device 10 is illustrated as being used, in this embodiment, the bezel opening 34 and the chassis opening 36 are not limited to such a usage state (or a mounted state), and the bezel opening 34 and the chassis opening 36 are vertical. The magneto-optical disk device 10 may be used so that the magneto-optical disk 12 extends in the direction and is rotated about the horizontal axis.

The chassis opening 36 is closed inside by a shutter plate 38. In this way, the space surrounded by the optical base 24, the upper cover 28, and the rear cover 30, that is, the space in which the magneto-optical disk 12 is loaded is the magneto-optical disk 1.
Except during the second loading or unloading operation, the completely sealed state will be maintained. In this way, in this embodiment, the problem of dust can be avoided when reading information from the loaded magneto-optical disk 12 or when writing information to the magneto-optical disk 12. As a result, more reliable information reading and writing can be achieved. here,
Since the control room rear cover 32 described above is set so that a control board, an interface board, and the like, which are not shown, are arranged in the control room where the rear cover 32 is closed, as shown in FIG. Many holes 32a are formed. The shutter plate 38 is provided with a shutter plate opening / closing mechanism 40, which will be described later, to allow the magneto-optical disk 12 to move.
The chassis opening 36 is opened according to the loading operation or the unloading operation.

Next, referring to FIGS. 5 and 6, the structure of the magneto-optical disk 12 used in the magneto-optical disk device 10 of this embodiment will be schematically described. The magneto-optical disk 12 is a disk cartridge 4 having a hollow inside.
2 is rotatably housed in the disk 2, and has a disk body 12a having recording layers formed on both upper and lower surfaces (or only one surface), and a spindle motor 44, which will be described later, formed at the center of the disk body 12a. And a hub 12b that is rotationally driven thereby.

Here, the magneto-optical disk 12 used in the magneto-optical disk device 10 of this embodiment is a double-sided disk capable of storing information in recording layers formed on both surfaces and a magnetic field modulation recording system. There are two types of discs, a single-sided disc having a recording layer capable of recording only on one side (A-side). In principle, it is difficult to perform high density recording on the double-sided disc type magneto-optical disc 12 by the magnetic field modulation recording method. Information indicating whether the magneto-optical disk 12 is a double-sided disk capable of reading information only or a single-sided disk capable of reading / writing information is MFZ (manufacturer management area) arranged in the outermost peripheral area of the magneto-optical disk 12. ) It is possible to record in advance on the control track.

On the other hand, in the magneto-optical disk device 10 of this embodiment, the recorded information is ISO in the magneto-optical disk 12 to be used, independently of the above-mentioned difference between one side and both sides.
Does it comply with (international) standards or ECMA (Europe)
The rotation speed is set to differ depending on whether it is a high-capacity disk conforming to the standard. As an example, ISO
When reading / recording the information recorded on the magneto-optical disk by the standard, rotate it at 4000 rpm while EC
When reading / recording information on a magneto-optical disc according to the MA standard, the disc is set to rotate at 3000 rpm. This magneto-optical disk 12 is ISO standard or ECMA
The information indicating the standard is recorded in advance on a control tok of a PEP (Phase Encoded Part) arranged in the innermost peripheral area of the magneto-optical disk 12.

A disk cartridge 42 in which the magneto-optical disk 12 is rotatably accommodated is formed in a hollow thin plate shape, and the magnetic head 14 and the optical head 16 described above are respectively formed on the recording layers of the disk body 12a on the upper and lower surfaces thereof. An access opening 42a for accessing and a motor opening 42b for allowing engagement of the tip of the motor shaft of the spindle motor 44 with the hub 12b are formed. Although not shown, a write protect that prohibits writing of information to the built-in magneto-optical disk 12 is releasably attached.

In this disc cartridge 42, a shutter 46 for closing the above-mentioned access opening 42a and motor opening 42b so that they can be opened at the same time is provided along a direction Y, which is orthogonal to the inserting direction indicated by the symbol X. It is movably attached. That is, as shown in FIG. 5, the shutter 46 includes an access opening 42a and a motor opening 42b.
Is movably attached between a closed position for simultaneously closing and, and an open position for simultaneously opening the access opening 42a and the motor opening 42b, as shown in FIG.
It is biased by a spring (not shown) so as to be elastically positioned at the closed position.

In other words, the shutter 46 is elastically held in the closed position shown in FIG. 5 in a state where it is taken out from the magneto-optical disk device 10, and dusts the magneto-optical disk 12 housed inside. The recording layer is protected from dust and the operator's fingers do not touch the recording layer. Further, the shutter 46 is moved from the closed position to the open position shown in FIG. 6 against the urging force of a spring (not shown) in the state where the shutter 46 is loaded in the magneto-optical disk device 10, and the opened access opening 42a. The magnetic head 14 and the optical head 16 are each allowed to access the recording layer of the disk body 12a via the disk, and writing / reading of information is possible, and the spindle motor is opened through the opened motor opening 42b. The tip of the motor shaft of 44 is the hub 1
By engaging with 2b, the magneto-optical disk 12 becomes rotatable.

The shutter 46 has a recess 46a formed at one side edge thereof, which is used when the shutter 46 is driven to open. More specifically, the recess 46a is formed by the magneto-optical disk 1
When one surface (A surface) of the second recording surface faces downward (that is, the A surface faces the optical head 16), the shutter 46 is arranged so as to be positioned in the upper half in the thickness direction. Has been done. The magneto-optical disk device 1 is inserted into the recess 46a during the loading operation of the disk cartridge 42 into the magneto-optical disk device 10.
One end of a pair of open arms 50a and 50b (described later) of a shutter opening mechanism 48 (described later) provided in 0 is fitted, and the loading operation of the disc cartridge 42 is further continued, By rotating the open arms 50a and 50b fitted to this,
The shutter 46 is configured to move from the closed position shown in FIG. 5 to the open position shown in FIG. 6 against the biasing force of the spring.

Both side surfaces of the front end portion of the disk cartridge 42 are inclined surfaces 42c, 42 slightly inclined inward.
and the inclined surfaces 42c and 42c.
In d, there is a hook groove 4 into which a cartridge hook 274 constituting an automatic load / unload mechanism 52 described later is fitted.
2e (for convenience of illustration, only the hook groove 42e formed on the one inclined surface 42c is shown). Although details will be described later, at a “cartridge unload position” defined during manual insertion of the disc cartridge 42, a cartridge hook 274 (described later in detail) is fitted into the hook groove 42e, and the “cartridge unload position” is set. The automatic loading / unloading mechanism 52 is activated by further manual insertion into the “cartridge insertion detection position” defined immediately after the “load position”, and is automatically driven by the driving force of the drive motor 56 described later. The disk cartridge 42 is pulled in along the insertion direction X from the "cartridge insertion detection position" in the magneto-optical disk device 10 to the "cartridge pull-in completion position", and subsequently, information is read from the "cartridge pull-in complete position" by the optical head 18. Lower to the readable "cartridge loading position" It is configured so as to load the disk cartridge 42.

Further, in this embodiment, when the magneto-optical disk device 10 is instructed to eject (unload) the magneto-optical disk 12, a part of the disk cartridge 42 is driven by the driving force of the drive motor 56 described above. , Is configured to be automatically ejected from the “cartridge loading position” to the “cartridge unloading position” protruding from the bezel opening 34 (that is, the position where it can be gripped by the operator's hand and further pulled out). .

The magneto-optical disk 12 usable in the magneto-optical disk apparatus 10 is an international standard (ISO) double-sided disk having an A surface and a B surface, and the magneto-optical disk apparatus 10 of this embodiment. There are two types, a dedicated (non-ISO) single-sided disc. Of these two types of discs, it is not possible to newly write an optical code signal for disc discrimination on an ISO double-sided disc, but this optical code signal is written on a single-sided disc dedicated to the magneto-optical disc device 10. For example, it is possible to write in the control track on the inner peripheral side. Thus, the optical code signal indicating whether the disc is a double-sided disc or a single-sided disc is
The disk cartridge 42 is in the "cartridge loading position", and is read by the optical head 16 while the magnetic head 14 is waiting at an "intermediate position" described later, and this read information is discriminated through a disc discriminating mechanism (not shown). Will be done.

Therefore, when the optical code signal is read, the disc discriminating mechanism determines that the loaded magneto-optical disc 12 is for one side, and based on this, the drive motor 56 is further driven in the forward direction. Will be done,
As will be described later in detail, the magnetic head 14 is further lowered from the “intermediate position” to the “magnetic head load position” described later,
The information can be read and recorded. If the optical code signal is not read by the disc discrimination mechanism, the loaded magneto-optical disc 12 is ISO
It is determined to be a standard double-sided disc. In this case, the drive motor 56 is not further driven, and the magnetic head 14 is held in the "intermediate position". Therefore, the magneto-optical disk device 10 is in a state where only the optical head 16 can read information.

Here, the magneto-optical disk device 10 of this embodiment has various characteristics as outlined below, and its configuration and operation will be described centering on the characteristics listed below. I will do it. (1) Attachment mechanism 20 for attaching front bezel 22 to main frame 18: (2) Attaching shutter plate 38 to disk cartridge 4
Shutter plate opening / closing mechanism 40 that automatically opens and closes according to load / unload of No. 2: (3) The drive force of the drive motor 56 drives the disk cartridge 42 to change from the “cartridge insertion detection position” to the “cartridge load position”. Automatic loading / unloading mechanism 52 for automatically unloading from the "cartridge loading position" to the "cartridge unloading position": (4) loading timing of the disk cartridge 42, etc. Detecting timing detection mechanism 60: (5) Vertical positioning mechanism 64 for accurately defining the vertical position of the "magnetic head load position" of the magnetic head mounting base 62 to which the magnetic head 14 is mounted: (6) Magnetic head The magnetic head row of the mounting base 62 Horizontal positioning mechanism 66 for accurately defining the horizontal position of the magnetic head 14: (7) Mount the magnetic head 14 on the magnetic head mounting base 62.
Magnetic head carriage 68 slidably supported on
Locking mechanism 70 for locking the outermost position in the "standby position" of: (8) Laser optical system 72 for guiding the laser light to the optical head 16.
(9) As a part of the initial processing at the time of starting the magneto-optical disk device 10, the magnetic head 14 and the optical head 16 are synchronized with each other at the outermost peripheral position of the magneto-optical disk 12. Control procedure for starting to take.

First, the above-mentioned (1) front bezel 22
About the attachment mechanism 20 to the main frame 18 of
This will be described with reference to FIGS. 8 to 11. In this embodiment, as shown in FIGS. 8 to 10, the attachment mechanism 20 is integrally attached to the above-described front bezel 22 so as to project rearward at both upper ends of the rear surface of the front bezel 22. The plate-like locking hooks 76 formed in a substantially L shape in a side view are integrally attached to the lower portions of both ends of the rear surface of the front bezel 22 so as to project rearward, and have a substantially rectangular shape in a side view. And a plate-shaped attachment plate portion 78 formed in the. Here, in each mounting plate portion 78, a mounting groove 82 into which the mounting screw 80 is inserted extends horizontally and is formed in a state of being opened at the rear edge.

On the other hand, the attachment mechanism 20 is formed on the front side of the standing portion 18b of each main frame 18 on the side of each main frame 18 described above at a position corresponding to the position where each locking hook 76 is disposed, and corresponds to this. The locking groove 84 in which the locking hook 76 is locked in the horizontal direction, and the respective mounting plate portions 78 on the front surface of the standing portions 18 b of the main frames 18.
The outer surface that is in slidable contact with the inner surface of the corresponding mounting plate portion 78 in a state corresponding to the arrangement position of the mounting plate portion inwardly bent in a so-called crank shape (that is, substantially L-shaped in plan view). And a mounting piece 86 formed on the.
Here, as shown in FIG. 10, each mounting piece 86 is formed with a screw groove 88 into which a corresponding mounting screw 80 is screwed.

Here, as shown in FIG. 10, the total height H ₁ of the locking hook 76 described above is set slightly shorter than the opening height H _{2 of} the locking groove 84. In detail, the height (H ₁ ) of the front end of the locking hook 76 is set higher than the height of the base end, and the upper surface of the front end is set higher than the upper surface of the base end. There is. Further, the locking groove 84 has an opening height on the back side set higher than the opening height (H ₂ ) on the entrance side, and the upper end surface defining the opening on the back side has the opening on the entrance side. It is set higher than the prescribed top surface.

Further, the mounting plate portion 78 and the mounting piece 86
With and fixed to each other with the mounting screw 80,
The rising portion 76 a of the locking hook 76 is fitted into the upper protruding groove portion 84 a of the locking groove 84, and the upper protruding groove portion 84 a.
It is set so as to engage with the falling portion 18c of the main frame 18 defining the front end face of a in the horizontal direction. In addition, as shown in FIG. 9, the outer surface of the mounting piece 86 is formed from the inner surface of the upright portion 18 b of the main frame 18.
At least the plate thickness of the mounting plate 78 is set to be inwardly displaced.

As shown in FIG. 9, the pair of left and right main frames 18 has a connecting plate 90 at their upper end surfaces.
Are connected to each other via. Further, on the upper end surface of each main frame 18, a mounting stay 92 for mounting / fixing an optical head mounting base 24, which will be described later, and a mounting stay 94 for mounting a control board, an interface board, etc. (not shown) are integrally mounted. Has been.

Since the mounting mechanism 20 is constructed as described above, when the front bezel 22 is mounted to the main frame 18, the lower end surface of the locking hook 76 is fitted to the corresponding locking groove 82 as shown in FIG. The front bezel 22 is brought close to the standing piece 18b of the main frame 18 in a state where the front bezel 22 is slidably contacted with the bottom surface of the main frame 18 and the inner side surface of the mounting plate portion 78 is slidably contacted with the outer surface of the corresponding mounting piece 86. With such a proximity operation, the rear surface of the front bezel 22 has the locking hook 76 completely fitted into the corresponding locking groove 82, and the rear surface of the front bezel 22 has the standing piece 18 of the main frame 18.
It contacts the front end face of b.

Thereafter, by lifting the front bezel 22 with respect to the main frame 18, as shown in FIG. 10, the engaging hook 76 has its rising portion 76a,
Falling portion 18 of standing portion 18b of main frame 18
It is fitted into the locking groove 84 while being engaged with c in the horizontal direction. Further, in such a fitted state of the locking hook 76 into the locking groove 84, as shown in FIG. 8, the mounting groove 82 formed in the mounting plate portion 78 is the screw groove formed in the mounting piece 86. The communication with 88 is made. From this state, through the mounting groove 82, the screw groove 8
The mounting plate portion 78 is fixed to the mounting piece 86 by screwing the mounting screw 80 onto the mounting plate 8.

In this way, the mounting plate 78 is fixed to the mounting piece 86 via the mounting screws 80, in other words, the lower portion of the front bezel 22 is fixed to the lower portion of the standing piece 18b of the main frame 18. In this state, the locking hook 76 is fitted in the locking groove 84 in a state where movement in the horizontal direction is prohibited. Therefore, while the lower part of the front bezel 22 is fixed to the lower part of the standing piece 18b of the main frame 18, the upper part of the front bezel is irremovably locked to the upper part of the standing piece 18b of the main frame 18. Become. As a result, by attaching the front bezel 22 to the main frame 18 via the attaching mechanism 20, the front bezel 22 is attached to the main frame 18 by using only two attaching screws 80.
Since it will be fixed in a tight state, the mounting operation can be efficiently performed, and the workability can be improved.

Further, in this embodiment, the engaging groove 84 into which the engaging hook 76 fits and the attaching plate 78 are simply attached without requiring complicated processing on the main frame 18 side. The attachment piece 86 may be formed by bending. In this way
In combination with the improvement in workability described above, cost reduction can be achieved by reducing the number of processing steps when forming the main frame 18 and reducing the parts cost.

The structure of the mounting mechanism 20 is not limited to the above-mentioned structure, but may be modified as shown in FIGS. 12 to 14, for example. A modified example of the attachment mechanism 20 will be described below, but the same parts as those of the above-described embodiment will be designated by the same reference numerals and the description thereof will be omitted.

In the mounting mechanism 20 'of this modification, as shown in FIG. 12, the locking hook 76 and the locking groove 84 are provided.
Is similarly provided, but differs from the configuration of the above-described embodiment in that the mounting piece 86 is not bent and formed on the main frame 18 and the mounting screw 80 is not used.

More specifically, the mounting plate portion 78 is formed on the rear surface of the front bezel 22 so that the outer surface of the mounting plate portion 78 is in sliding contact with the inner surface of the corresponding main frame 18. A locking projection 96 is formed on the outer surface of the mounting plate 78. On the other hand, in the state where the front bezel 22 is attached to the main frame 18, the engaging hole 98 into which the protrusion 96 is fitted is formed in the portion of the main frame 18 where the protrusion 96 is located.

Since the mounting mechanism 20 'of the modified example is constructed in this way, when mounting the front bezel 20 to the main frame 18, first, as in the above-described embodiment, the locking hook 76 is locked in the locking groove. It is fitted to 84. At this time, as shown in FIG. 13, the mounting plate portion 78 is deformed by its own elasticity by the amount of the protrusion 96. Then, the front bezel 22 is lifted up, and the locking hook 76 is locked in the horizontal direction in the locking groove 8
4, the protrusions 96 are fitted into the corresponding locking holes 98 as shown in FIG. In this way, the front bezel 22 is tightly fixed to the main frame 18 in the same state as the mounting mechanism 20 of the above-described embodiment.

In particular, in the mounting mechanism 20 'of this modified example, since no mounting screws are used, the cost of parts can be reduced accordingly, and the mounting piece 86 on the main frame 18 can be reduced. Since it is not necessary to perform bending processing, the processing cost for processing the main frame 18 is low, and thus the manufacturing cost can be further reduced.

Further, the above-mentioned mounting mechanism 20, 20 '.
The front bezel 22 to the main frame 18
After the locking hook 76 is pushed into the locking groove 84 along the insertion direction X, the front bezel 2
Although it has been described that the locking hook 76 is configured to be hooked in the locking groove 84 by lifting 2, the locking hook 76 and the locking groove 84 are not limited to this.
The front bezel 22 may be similarly pushed into the main frame 18 and then pushed down to engage with each other, so that the locking hook 76 is hooked in the locking groove 84.

Next, the remaining (2) of the above-mentioned characteristic structure
Before describing (9) to (9), the internal structure of the magneto-optical disk device 10 will be described with reference to FIGS. In the loading chassis 26 described above, FIG.
As shown in the frame structure of FIG. 16, the cartridge holder 100 that receives the disc cartridge 42 inserted into the magneto-optical disc device 10 through the bezel opening 34 and the chassis opening 36 is arranged so as to be vertically movable. It is set up.

That is, the cartridge holder 100 is
A "cartridge receiving position" for receiving the disk cartridge 42 which is located directly inside the chassis opening 36 and is inserted into the magneto-optical disk device 10 through the bezel opening 34 and the chassis opening 36. The information can be read from and recorded on the recording layer of the magneto-optical disk 12 by the optical head 16 located below the "position" and disposed on the optical head mounting base 24. It is configured to be moved and driven in the vertical direction by an automatic loading / unloading mechanism 52, which will be described later, between two positions, a "cartridge loading position", which can be rotationally driven by a motor 44.

16 and 17, the cartridge holder 100 is basically formed in a housing shape in which the front surface and the rear surface are fully opened to receive the disk cartridge 42. Top plate 100a
And a bottom plate 100b and both side plates 100c and 100d. Here, as shown only in the left half of FIG. 18, the magneto-optical characteristics of the optical head 16 and the spindle motor 44, which are arranged on the optical head mounting base 24 and support the accommodated disk cartridge 42 only at both ends thereof. In order to allow access to the lower surface of the disk 12, a bottom plate 100b is formed with a lower opening 100e that is substantially opened to the left and right ends of the bottom plate 100b. On the other hand, in order to allow the magnetic head 14 disposed on the magnetic head mounting base 62 to access the upper surface of the magneto-optical disk 12, the top plate 100a is largely opened except the left and right ends and the front end thereof. The opening 100f is formed.

Here, as shown in FIGS. 17 and 18, the cartridge holder 100 is referred to as a "cartridge receiving position" and a "cartridge loading position" on each of the left and right edges of the top plate 100a of the cartridge holder 100. Automatic load / unload mechanism 52 for vertically moving between
Two cam grooves 102a, 102b for vertically moving the cartridge holder, which are respectively formed in a pair of left and right control cam plates 102, 104 (which will be described later) configuring
Cam pin 10 as a cam follower for engaging with each
6a; 106b, 106c; 106d are attached in a state of projecting outward through the attaching stays 108a; 108b, 108c; 108d, respectively.

At the rear of the cartridge holder 100, the shutter 4 of the disk cartridge 42 being inserted is inserted.
A shutter opening mechanism 48 is provided for opening and driving 6 according to the insertion operation of the disk cartridge 42. The shutter opening mechanism 48 includes open arms 50a and 50b, each of which has its rear end rotatably pivoted around a support shaft 110, on the lower surface of the rear end of both edges of the top plate 100a, and each support on the top plate 100a. Each of the open arms 50 has a guide groove 112 that is formed in an arc shape around the shaft 110 and that guides the middle portions of the corresponding open arms 50a and 50b.
a and 50b are urged to rotate outward (that is, as shown in FIG.
The left open arm 50a shown in Fig. 18 is urged to rotate in the clockwise direction, and the right open arm 50b not shown in Fig. 18 is urged to turn in the counterclockwise direction). It is equipped with.

Here, both open arms 50a and 50b
Indicates the mounting height position of the disc cartridge 42.
Direction when inserting (ie, A of the magneto-optical disk 12)
Depending on whether the surface is facing downward or the surface B is facing downward), the left open arm 50a is set to be different from the right open arm 50a. It is set higher than the open arm 50b. In this way, both open arms 50a and 50b can rotate independently of each other without interference. As a result, when the magneto-optical disk cartridge 42 is inserted with the surface A of the magneto-optical disk 12 facing downward, the tip of the open arm 50a on the left side in the drawing fits into the recess 46a, and the surface B is When it is inserted downward, the tip end of the open arm 50b on the right side in the figure fits into the recess 46a.

On the other hand, the standby position of each open arm 50a, 50b is defined by the contact of the middle part of each of the outer ends of the corresponding guide grooves 112, and at this standby position, the left open arm 50a is opened. The tip of the disc is inserted into the recess 46a of the shutter 46 of the disc cartridge 42 having the A side inserted upward, and the tip of the right open arm 50b has the B side inserted upward. It is set so as to be fitted into the recess 46a of the shutter 46 of the cartridge 42, respectively. Then, while the disc cartridge 42 is being inserted, the corresponding open arms 50 a and 50 b are inserted into the recess 46 of the shutter 46.
When the insertion operation is further performed from the state of being fitted to the a, the open arm 50a or 50b fitted to the recess 46a is pushed by the shutter 46 and the torsion spring 114.
As a result, the shutter 46 having the tip of the open arm 50a or 50b fitted in the recess 46a is moved from the closed position shown in FIG. 5 to the open position shown in FIG. , The access opening 42a and the motor opening 42b are opened respectively. The recess 46
open arm 50a or 50b that does not fit to a
Simply comes into contact with the front end surface of the shutter 46 or the front end surface of the disc cartridge 42, and idles with the insertion operation.

Further, above the front part of the loading chassis 26, as shown in FIGS. 15 and 16, again, a gear chassis 118 on which the drive mechanism 116 constituting the automatic load / unload mechanism 52 is mounted is fixed. It is arranged in a closed state. The drive motor 56, which constitutes the drive source, is mounted on the gear chassis 118. On the other hand, at the rear of the loading chassis 26, a magnetic head mounting base 62 on which the magnetic head 14 is arranged is arranged so as to be vertically movable.

Specifically, the magnetic head mounting base 62 has a "standby position" located above the cartridge holder 100 in the "cartridge receiving position" and a cartridge holder 100 in the "cartridge loading position".
Located directly above the magnetic head mounting base 62
The magnetic head 14 disposed on the lower surface of the "magnetic head loading position" enables reading and recording of information on the recording layer of the magneto-optical disk 12 in cooperation with the above-mentioned optical head 16, and this "standby position". Position "and" magnetic head load position ", and three intermediate positions" intermediate position ". The automatic load / unload mechanism 52, which will be described later, moves and drives in the vertical direction. Has been done.

On the other hand, on the gear chassis 118, the cartridge holder 100 is vertically moved between the "cartridge receiving position" and the "cartridge loading position" in synchronization with the loading / unloading operation of the disc cartridge 42. A synchro servo board 12 provided with a synchro servo control circuit for controlling the magnetic head mounting base 62 to be vertically moved between a "standby position", an "intermediate position" and a "magnetic head load position".
0 is attached. This synchro servo board 12
In order to dissipate the heat generated from 0, a heat radiating plate 122 is attached to a portion of the upper cover 28 located immediately above the synchro servo board 120. In front of the gear chassis 118, a shutter plate opening / closing mechanism 40 for opening / closing the shutter plate 38 is provided.

In the above-mentioned control chamber located below the optical head mounting base 24, the position control and drive control of the magnetic head 14 and the optical head 16 and the recording control and reading control of information are executed. Control boards 124a and 124b in which a control circuit, a synchronizing circuit and the like are incorporated are arranged in a two-tiered structure.

Next, as shown in FIG. 19, the optical head 16
Through the linear bearing 126 (shown in FIG. 20) on the optical head mounting base 24.
Is mounted on an optical head carriage 128 which is supported so as to be movable in the radial direction of. The optical head carriage 128 has a coil 13 fixed to both ends thereof.
0 is arranged around a yoke 132 arranged so as to extend along both sides of the movement path of the optical head carriage 128 by a linear motor 134.
2 is moved and driven to an arbitrary position along the radial direction.

On the other hand, the linear bearing 126 described above
As shown in FIG. 20, the fixing member 136 fixed to the optical head mounting base 24 and the optical head carriage 12
Movable member 138 fixed to the lower surface of
6 and a movable member 138, and a bearing ball 140 interposed therebetween. Here, the fixing member 1
Although not shown in detail, reference numeral 36 is composed of a member formed in a substantially U shape and long, while the movable member 13 is provided.
8 is narrower than the fixing member 136 and is formed in a substantially U shape and long. Rolling grooves (not shown) are formed on the side surfaces of the fixed member 136 and the movable member 138 which are opposed to each other, and the bearing balls 140 are rotatably fitted between the opposed rolling grooves.

Further, the optical head 16 converges a laser beam from a laser light source 370 of a laser optical system 72, which will be described later, onto the recording layer of the magneto-optical disk 12 via the objective lens 146 to read information (that is, At the time of reproduction), the reflected light from this recording layer is received by a light receiving element (not shown) to read a magneto-optical recording signal. The light is converged on the recording layer of the magneto-optical disk 12, the temperature of the recording layer is raised to the Curie temperature, and information can be written (or overwritten) in the recording layer in cooperation with the magnetic head 14. Has been done.

It should be noted that, as shown in FIG. 19, the optical head carriage 128 is provided with
Further, a carriage arm 148 extending along the insertion direction X of the disc cartridge 42 is attached, and an outer end portion of the carriage arm 148, that is, an outer circumferential end portion of the magneto-optical disc 12 is provided. Although details will be described later, in order to synchronize the operations of the magnetic head 14 and the optical head 16 along the radial direction of the magneto-optical disk 12, a reflector 154 as a detected portion detected by the pair of photocouplers 150 and 152. Is attached. The spindle motor 44 described above is mounted on the optical head mounting base 24 in a state of being adjacent to the optical head 16 located on the radially innermost end side of the magneto-optical disk 12 on the radially inner side.

Next, as shown in FIG. 21, the magnetic head 14
Are attached to the lower surface of the magnetic head carriage 68, which is movably supported in the radial direction of the magneto-optical disk 12 via a linear bearing 156 (shown in FIG. 20) on the lower surface of the magnetic head mounting base 62. . The magnetic head carriage 68 is a linear motor constructed by arranging coils 158 fixed at both ends thereof around a yoke 160 arranged so as to extend along both sides of a moving path of the magnetic head carriage 68. By 162, it is moved and driven to an arbitrary position along the radial direction of the magneto-optical disk 12.

On the other hand, the linear bearing 156 described above
As shown in FIG. 20, the magnetic head mounting base 62
A fixed member 164 fixed on the magnetic head carriage 68, a movable member 166 fixed on the magnetic head carriage 68, and a fixed member 164.
And a bearing ball 168 interposed between the movable member 166 and the movable member 166. Here, the fixing member 16
Although not shown in detail, reference numeral 4 denotes a member formed in a substantially U shape and long, while the movable member 166 is provided.
Is narrower than the fixing member 164 and has a substantially U shape, and
It is formed long. Rolling grooves (not shown) are formed on the side surfaces of the fixed member 164 and the movable member 166 that face each other, and a bearing ball 168 is rotatably fitted between these rolling grooves that face each other.

It should be noted that, as shown in FIG. 21, the magnetic head carriage 68 extends along the radial direction of the magneto-optical disk 12.
Further, a carriage arm 170 extending along the insertion direction X of the disc cartridge 42 is attached, and an outer end portion of the carriage arm 170, that is, an outer circumferential end portion of the magneto-optical disc 12 is provided. As will be described later in detail, as a synchronization mechanism for synchronizing the operations of the magnetic head 14 and the optical head 16 in the radial direction of the magneto-optical disk 12, a pair of photocouplers that emit light toward the above-described reflector 154. 150 and 152 are arranged side by side along the extending direction of the carriage arm 170. Each of the photocouplers 150 and 152 includes a light emitting element that emits light toward the reflection plate 154, and the reflection plate 15.
And a light receiving element that receives the reflected light from
An output signal from this light receiving element is sent to the above-mentioned control circuit as a synchronization detection signal.

Here, the positional relationship between the above-mentioned reflection plate 154 and the pair of photocouplers 150 and 152 is such that the magnetic head 14 and the optical head 16 are aligned in the vertical direction, that is, both are in the vertical direction. When the positions are matched (in other words, a predetermined magnetic field can be applied by the magnetic head 14 to a predetermined portion of the recording layer which is irradiated with the laser beam through the optical head 16 and raised to the Curie temperature. In the case of the positional relationship), the outputs from the light receiving elements of both photocouplers 150 and 152 are set to be equal to each other.

In this embodiment, the magnetic head 14 and the optical head 16 are attached to the magnetic head carriage 68 and the optical head carriage 128, respectively.
However, the corresponding linear motors 162 and 134 define their mutual positions so as to bring them to the synchronously detectable range in the state where they are moved to the outermost radial position of the magneto-optical disk 12. Specifically, when the magnetic head 14 and the optical head 16 are at the outermost radial position of the magneto-optical disk 12, the light emitted from at least one of the photocouplers 150 and 152 is reflected by the reflecting plate 154. , The corresponding photo coupler 150,
It is set so that the light receiving element constituting 152 receives light.

Here, the optical head carriage 128 is driven by a linear motor 134 which is driven based on a control signal from a control circuit (not shown) provided on the above-mentioned control boards 124a and 124b to drive the magneto-optical disk 12.
The magnetic head carriage 68 is driven and moved to a desired position in the radial direction of the control board 124a, 12 described above.
Based on a synchronizing signal from a synchronizing circuit (not shown) provided in 4b, the driving force of the linear motor 162 is driven so that the outputs from the light receiving elements of both photocouplers 150 and 152 become equal to each other. It is driven to move in the radial direction. In this manner, the magnetic head 14 and the optical head 16 are integrally moved in the radial direction of the magneto-optical disk 12 while being synchronized with each other.

On the other hand, as shown in FIG. 21, a cantilevered load beam 172 is provided on the lower surface of the magnetic head carriage 68.
However, the base end portion is positioned on the rotation center side of the magneto-optical disk 12 and is fixed by a fixing screw 174. The above-described magnetic head 14 is attached to the tip of the load beam 172 that is directed toward the outer peripheral side of the magneto-optical disk 12. Here, this load beam 172
Is in a state in which the magnetic head mounting base 62 is in a position other than the magnetic head loading position, the tip thereof is bent downward until it comes into contact with the magnetic head holding plate 176 by the spring force of the load beam 172, and is tilted slightly downward. Has been done. The magneto-optical disk 12 is already set to be rotationally driven by the spindle motor 44 when the magnetic head mounting base 62 is brought to the magnetic head loading position by the automatic loading / unloading mechanism 52 described later. Therefore, the magnetic head 14 having the air floating type slider surface is held at a stable height position at a position where the spring force of the load beam 172 and the wind pressure by the rotating magneto-optical disk 12 are balanced. . As a result, when the magnetic head 14 is brought to the magnetic head load position, the magnetic head 14 is substantially parallel to the magneto-optical disk 12 with a slight gap, and is very close to the recording layer on the upper surface of the magneto-optical disk 12. Will be achieved.

Both edges of the magnetic head mounting base 62 along the inserting direction X are bent downward, and the magnetic head mounting base 62 is formed on both outer side surfaces.
For vertical movement of a magnetic head mounting base, which will be described later, formed on a pair of left and right control cam plates 102 and 104 for vertically moving between the "standby position", the "intermediate position", and the "magnetic head load position". Two cam grooves 102b ₁ ,
Cam pins 178a and 178b serving as cam followers for engaging with 102b ₂ ; 104b ₁ and 104b ₂ , respectively.
178c; 178d are attached so as to project outward.

On the other hand, the above-mentioned loading chassis 26
22 shows the front bezel 22 as shown in FIG.
A front portion 26a that is located directly inward of the chassis and has a chassis opening 36 that communicates with the bezel opening 34;
The front portion 26a is integrally formed with a pair of left and right side portions 26b and 26c extending rearward along the insertion direction X from the left and right ends of the front portion 26a. Each side portion 26b,
In the upper part of 26c, a recess 2 extending along the insertion direction X is formed.
6d and 26e are formed by bending the upper portions of the corresponding side portions 26b and 26c, respectively. A pair of left and right control cam plates 102 and 104 whose cam shapes will be described in detail later are slidably fitted in the pair of left and right recesses 26d and 26e along the insertion direction X, respectively.

Incidentally, a pair of cam pins 178a; 1 attached to the left and right side edges of the above-mentioned magnetic head mounting base 62 are mounted on the standing side plate portions of the recesses 26d and 26e.
78b, 178c; 178d are respectively inserted,
A pair of first vertical grooves 180a extending along the vertical direction
₁ ; 180a ₂ , 180b ₁ ; 180b ₂ are formed so as to penetrate in the thickness direction. That is, the magnetic head mounting base 62 has the cam pins 178a, 178b, 178c; 178d mounted thereon and the corresponding first vertical grooves 180a ₁ ; 180a ₂ , 180b ₁ ; 1
It is restricted to be movable only along the vertical direction through the fitting with 80b ₂ . Incidentally, these cam pins 178a;
178b, 178c; 178d are cams for moving up and down the magnetic head mounting base formed on the corresponding control cam plates 102, 104 after penetrating the corresponding first vertical grooves 180a ₁ ; 180a ₂ , 180b ₁ ; 180b _2. Groove 1
02b ₁ ; 102b ₂ ; 104b ₁ ; 104b ₂ respectively.

On the other hand, a pair of cam pins 106a;
6b, 106c; 106d are respectively inserted and second vertical grooves 182a ₁ ; 18 extending along the vertical direction
2a ₂ , 182b _{1 and} 182b ₂ are formed so as to penetrate in the thickness direction. That is, the cartridge holder 100 has the cam pins 106a;
06b, 106c; 106d and the corresponding second vertical grooves 182a ₁ ; 182a ₂ , 182b ₁ ; 182b ₂ are restricted to be movable only in the vertical direction. Incidentally, these cam pins 106a; 106b, 1
06c; 106d is the corresponding second vertical groove 182a.
₁ ; 182a ₂ , 182b ₁ ; 182b ₂ and then, the cam grooves 102a ₁ ; 102 for vertically moving the cartridge holder formed in the corresponding control cam plates 102, 104
a _2, 104a _1; is set so as to respectively fit into 104a _2.

A shutter plate opening / closing mechanism 4 to be described later is provided at the front of the side plate portion where the recesses 26d and 26e are erected.
The openings 186a and 186b into which the cam pins 184a and 184b provided at 0 are inserted respectively in the thickness direction are formed. Incidentally, these cam pins 184a, 1
84b is set so as to be fitted into the cam grooves 102c and 104c for opening and closing the shutter plate formed in the corresponding control cam plates 102 and 104, respectively, after penetrating the corresponding openings 186a and 186b. Here, each recess 26
A plurality of mounting stays 188 to which the above-described gear chassis 118 is mounted and fixed are formed by bending on inner surfaces of the front side upper portions of the standing side plates of d and 26e that face each other. Further, a plurality of mounting stays 190 for mounting and fixing the loading chassis 26 on the above-mentioned optical head mounting base 24 are bent on inner side surfaces of the front lower portions of the standing side plates of the recesses 26d and 26e, which face each other. It is molded.

Next, the structure of the left and right control cam plates 102 and 104 will be described with reference to FIGS. Here, the control cam plates 102 and 104 are integrally molded of plastic and slide in the corresponding recesses 26d and 26e without bearings. The left control cam plate 102 has an inner surface shape shown in FIG. 23 and an outer surface shape shown in FIG. 24, and the cam groove 102 for opening and closing the shutter plate extends along the insertion direction X from the chassis opening 36 side.
c, first cam groove 102 for vertically moving the cartridge holder
a ₁ , a _first cam groove 102b ₁ for vertically moving the magnetic head mounting base, a _second cam groove 102a ₂ for vertically moving the cartridge holder, a second cam groove 102b ₂ for vertically moving the magnetic head mounting base, and will be described later. The pressing cam groove 102d forming the horizontal positioning mechanism 66 is sequentially formed.

The control cam plate 104 on the right side has its inner surface shape shown in FIG. 25 and its outer surface shape shown in FIG.
A cam groove 104c for opening / closing the shutter plate, a first cam groove 104a ₁ for vertically moving the cartridge holder, a first cam groove 104b ₁ for vertically moving the magnetic head mounting base 104, and a cartridge along the insertion direction X from the chassis opening 36 side. A second cam groove 104a ₂ for vertically moving the holder and a second cam groove 104b ₂ for vertically moving the magnetic head mounting base.
Are sequentially formed. Here, each control cam plate 102,
The guide groove 1 is provided on the guide groove 104 so as to extend along the insertion direction X.
92, 194 are formed, and the corresponding recesses 26d,
Guide pins 196, 1 which are respectively fitted into corresponding guide grooves 192, 194 are provided on the outer surface of the standing side plate portion of 26e.
98 (shown in FIG. 22) is planted. In this way, the control cam plates 102 and 104 are restricted so as to move only along the insertion direction X.

The first and second cam grooves 102b ₁ ; 102b ₂ , 104b ₁ for vertically moving the magnetic head mounting base in each of the left and right control cam plates 102, 104;
All the remaining cam grooves, except the lower half of each of the 104b ₂ , are composed of bottomed grooves that are open in the thickness direction, that is, only on the inner surface of each of the corresponding control cam plates 102, 104. Has been done. On the other hand, the first and second cam grooves 102b ₁ ; 10 for vertically moving the magnetic head mounting base 10
The lower half of each of 2b ₂ , 104b _{1 and} 104b ₂ is formed of a through groove that penetrates the corresponding control cam plates 102 and 104 in the thickness direction.

Here, when the automatic loading operation is started with the inserting operation of the disk cartridge 42 in the automatic loading / unloading mechanism 52 which will be described later, the left control cam plate 102 is directed rearward along the inserting direction X. The control cam plate 104 on the right side is set to be driven to move forward along the direction opposite to the insertion direction X. Therefore, the control cam plate 102 on the left side
Cam groove 102 for opening and closing the shutter plate formed on
c, first cam groove 102 for vertically moving the cartridge holder
a ₁ , a _first cam groove 102b ₁ for vertically moving the magnetic head mounting base, a _second cam groove 102a ₂ for vertically moving the cartridge holder, a second cam groove 102b ₂ for vertically moving the magnetic head mounting base, and A cam groove 104c for opening and closing the shutter plate formed in the control cam plate 104,
First cam groove 104a for vertically moving the cartridge holder
₁ , a first cam groove 104b ₁ for vertically moving the magnetic head mounting base, a _second cam groove 104a ₂ for vertically moving the cartridge holder, and a _second cam groove 104b ₂ for vertically moving the magnetic head mounting base. Are formed so as to be in a right-left inverted state.

As a result, the left control cam plate 10 is shown in FIG.
2, the cam grooves 102a ₁ and 102b shown in the right side view.
The cam shapes of ₁ , 102a ₂ and 102b ₂ and the cam groove 1 shown in the state of the right side control cam plate 104 in left side view in FIG.
The cam shapes of 04a ₁ , 104b ₁ , 104a ₂ and 104b ₂ are the same, although the positions of arrangement are different. In other words, as shown in FIG. 27, the cam grooves 102a ₁ for moving the cartridge holder up and down;
The cam-shaped grooves A of a ₂ , 104a _{1 and} 104a ₂ are set to have the same shape, and the cam grooves 102b ₁ ; 102b ₂ and 104b for moving the magnetic head mounting base up and down.
The cam groove shapes B of ₁ ; 104b ₂ are set to the same shape, respectively.
The cam groove shapes C of c and 104c are set to the same shape.

The cam groove shape A of the cam grooves 102a ₁ ; 102a ₂ , 104a ₁ ; 104a ₂ for moving the cartridge holder up and down, and the cam grooves 102b ₁ ; 102b ₂ , 104b ₁ ; 104b for moving the magnetic head mounting base up and down.
_As shown in FIG. 27, the cam groove shape B of ₂ and the cam groove shape C of the cam grooves 102c and 104c for opening and closing the shutter plate are set so as to achieve their respective operating positions. Has been done.

That is, the cam groove shape A of the cam grooves 102a ₁ ; 102a ₂ , 104a ₁ ; 104a ₂ for moving the cartridge holder up and down defines the "cartridge receiving position" of the cartridge holder 100, and A _first horizontal cam groove portion A ₁ for holding the cartridge holder 100 at the “cartridge receiving position” while the cartridge holder 100 is being moved from the “insertion detection position” to the “cartridge pull-in completion position” (P2);
A _second inclined cam groove portion A ₂ inclined obliquely downward from the rear end of the first cam groove A 1 in the insertion direction and a lower end of the _second cam groove portion A ₂ are connected to define a “cartridge loading position”. It is configured to have a _third horizontal cam groove portion A ₃ .

Further, the cam grooves 102b ₁ ; 102b ₂ , 104b ₁ ; 104 for moving the magnetic head mounting base up and down.
The cam groove shape B of b ₂ is the magnetic head mounting base 62.
The first horizontal cam groove portion B ₁ that defines the "standby position" of
A second inclined cam groove portion B ₂ inclined obliquely downward from the rear end of the first horizontal cam groove portion B _{1 in} the insertion direction and a lower end of the _second cam groove portion B ₂ are connected to each other, and Third horizontal cam groove B that defines the "intermediate position"
₃ , a fourth inclined cam groove B ₄ inclined obliquely downward from the rear end of the _third horizontal cam groove B _{3 in} the insertion direction, and a lower end of the _fourth cam groove B ₄ are connected to each other to attach the magnetic head. The base 62 has a _fifth horizontal cam groove B ₅ that defines the “magnetic head load position”.

Further, the cam groove 1 for opening and closing the shutter plate
The cam shapes C of 02c and 104c are the first horizontal cam groove portion C ₁ that defines the lowermost position of the shutter plate 38,
A second inclined cam groove C ₂ inclined obliquely upward from the rear end of the first horizontal cam groove C _{1 in} the insertion direction and an upper end of the second cam groove C ₂ are connected to each other, and the uppermost position of the shutter plate 38. Defining a third horizontal cam groove portion C ₃ , a fourth inclined cam groove portion C ₄ inclined obliquely downward from the rear end of the _third horizontal cam groove portion C _{3 in} the insertion direction, and the fourth cam groove portion C 3. _It is connected to the lower end of ₄ and defines the lowermost position of the shutter plate 38, and has a _fifth horizontal cam groove C ₅ whose upper part is largely opened.

As shown in FIGS. 23 to 26, the driving force from the driving motor 56 is transmitted to the bottom surfaces of the control cam plates 102 and 104 in the automatic loading / unloading mechanism 52 described later. Mating recesses 102e and 104e are formed.

Now, the (5) vertical direction positioning mechanism 64 having the characteristic construction in this embodiment will be described with reference to FIGS. 23 to 26 and FIG. 7 described above.

That is, the magnetic head mounting base 62 on which the magnetic head 14 is arranged is automatically loaded / loaded as will be described later.
By the operation of the unloading mechanism 52, the front end edge is folded inward on both side portions 26b and 26c of the loading chassis 26 while being lowered from the "standby position" and loaded in the "magnetic head loading position". A pair of left and right front position restriction pieces 26f, 26g formed in a retracted state (see FIG.
For convenience of illustration, only one front position restricting piece 26g is shown in FIG. ) A pair of left and right rear position regulating pins 24a, 2 which are integrally formed on the optical head mounting base 24 while being mounted on the rear side of the optical head mounting base 24.
It is set so that the vertical position is defined by being placed on each of 4b. In other words, in the vertical positioning mechanism 62, the front end edge and the rear end edge of the magnetic head mounting base 62 are elastically pressed onto the front position restricting pieces 26f and 26g and the rear position restricting pins 24a and 24b. It is configured to be accurately positioned at the "magnetic head load position" by securely placing it in the contact state.

Therefore, the first and second cam grooves 102b ₁ ; 102b for vertically moving these magnetic head mounting bases.
₂ , 104b ₁ ; 104b ₂ include the fourth and fifth of each
Horizontal cam groove portions B ₄ of, in a state where the position above the B _5, the pressing pieces 200a, 2 constituting the vertical positioning mechanism 64
The cam grooves 102b ₁ ; 102b ₂ , 104b ₁ ; 104 to which 00b, 200c, and 200d correspond only at their upper ends, respectively.
It is arranged so as to be integrally connected to the intermediate portion of b ₂ . The vertical positioning mechanism 64 is shown in FIG.
And as shown in FIG. 25, the left and right control cam plates 102, 10
4 is attached to the outer surface of each of the four pressing pieces 20
0a, 200b; 200c, 200d at the positions shown, respectively, for holding the wire springs 202 elastically,
204 is further provided.

Incidentally, the first and second cam grooves 102b ₁ ; 102b ₂ , 104 for vertically moving the magnetic head mounting base.
b _1; cam pin was brought to a fifth cam groove B ₅ each _{104b 2 178a; 178b, 178c;} 178
In d, the front end edge and the rear end edge of the magnetic head mounting base 62 are placed on the front position restricting pieces 26f, 26g and the rear position restricting pins 24a, 24b, and brought to the "magnetic head load position". State, the corresponding cam groove B5
It is designed to be lifted slightly from the bottom of the.
As a result, at the "magnetic head load position", the cam pins 178a; 178b, 178c; 178d exert a pressing force downward by the wire springs 202, 204 via the corresponding pressing pieces 200a, 200b, 200c, 200d. I will receive it.

In this way, these cam pins 178a;
178b, 178c; 178d is mounted, and the magnetic head mounting base 62 in which the magnetic head 14 is disposed
Is a "magnetic head loading position" defined by the cam groove B ₅ of the fifth, these pressing pieces 200a, 200b, 2
00c, 200d and the wire springs 202, 204 are elastically pressed down, so that the front end edge and the rear end edge of the magnetic head mounting base 62 are moved forward.
6f, 26g and the rear position regulating pins 24a, 24b are reliably pressed in contact with each other while being elastically pressed. As a result, this magnetic head mounting base 6
The vertical position of the magnetic head 14 attached to
When this is brought to the "magnetic head load position", it is accurately positioned.

Next, regarding (2) the opening / closing mechanism 40 of the shutter plate 38 having the characteristic construction in this embodiment,
This will be described with reference to FIGS. 28 to 37.

As shown in FIGS. 28 and 29, the shutter plate opening / closing mechanism 40 is disposed on both the left and right sides of the above-described loading gear chassis 26 and inside the left and right side plates 26d and 26e of the loading chassis 26. In addition, swing levers 212 and 210 pivotally supported around support pins 208 and 206 at their rear end portions, and projecting outwardly at the intermediate portions of both swing levers 212 and 210, respectively. The cam pins 216 and 214 fitted into the corresponding cam grooves 102c and 104c for opening and closing the shutter plates of the control cam plates 102 and 104, and the support pins 208 and 206.
A torsion spring 22 that is wound around each and urges the corresponding rocking levers 212 and 210 to rotate downward.
And 0,218. Here, the shutter plate 38 is rotatably supported by the tips of the swing levers 212, 210.

Further, the shutter plate opening / closing mechanism 40
Is a fan-shaped movable gear 224 attached to the tip of the right swing lever 210 so as to be rotatable around a support shaft 222,
A fixed gear 226 integrally formed on the upper right side of the shutter plate 38 and meshing with the movable gear 224 and the above-mentioned movable gear 224 are rotationally biased clockwise in FIG. 28 (that is, the movable gear 224). A torsion spring 228 is further provided for biasing the shutter plate 38 to which the fixed gear 226 meshing with is fixed in a direction to close the chassis opening 36. Incidentally, the rear end of the movable gear 224 comes into contact with the top plate 118c bent inward from the upper end of the left side plate 118a of the gear chassis 118 from below when the swing lever 210 is raised, A locking portion 230 that is set so that its rotation is restricted is integrally formed.

In the shutter plate opening / closing mechanism 40 configured as described above, the opening / closing operation of the shutter plate 38 will be described with reference to FIGS. 30 to 37. The cam pin 214 attached to the right swing lever 210
Is fitted in the cam groove 104c formed in the corresponding right control cam plate 104.
In the figure, for convenience of illustration, the swing lever 210 is illustrated as being swing-driven based on the movement of the left control cam plate 102.

As shown in FIG. 30, when the disc cartridge 42 is not loaded in the magneto-optical disc device 10 at all, the rocking levers 210 and 212 of the rocking levers 210 and 212 respectively correspond to the cam grooves 102c and 10c corresponding to the cam pins 214 and 216, respectively.
4c, the shutter plate 38 is brought to the lowermost position based on the position where it is fitted into the horizontal cam groove portion C ₁ which defines the lowermost position, and as a result, the shutter plate 38 is also at the same height position as the chassis opening 36. I'm being taken over. Further, in this state, since the locking portion 230 is not in contact with the top plate 118c of the gear chassis 118, the shutter plate 38 is biased by the torsion spring 228 so that the loading chassis 2 is loaded.
6 is brought into contact with the rear surface of the front portion 26a, and in this way,
The chassis opening 36 will be completely closed from the inside.

From the unloaded state shown in FIG. 30, the operator starts the loading operation of the disc cartridge 42, and manually inserts the tip of the disc cartridge 42 slightly into the magneto-optical disc device 10 through the chassis opening 36. Then, as shown in FIG. 31, the disc cartridge 42
When the shutter plate 38 is pushed by the tip of the shutter plate 38, the shutter plate 38 rotates against the biasing force of the torsion spring 228 that biases the movable gear 224, which meshes with the fixed gear 226 fixed thereto, in the counterclockwise direction, and the chassis opening 36. Will be released slightly.

When the operator manually further inserts the disc cartridge 42 inward from the slightly inserted state shown in FIG. 31, the tip of the disc cartridge 42 moves to the shutter plate 38 as shown in FIG. When it reaches the entrance of the cartridge holder 100 at the “cartridge receiving position” in the state of being flipped up and further inserted, the rear end of the disc cartridge 42 is outside the chassis opening 36 as shown in FIG. With a slight amount left, the tip will enter into the cartridge holder 100.

From the state shown in FIG. 33, the disc cartridge 42 is further manually inserted slightly and brought to the "cartridge insertion detection position", so that the timing detection mechanism 60, which will be described later, detects the insertion operation of the disc cartridge 42. Then, the automatic loading / unloading mechanism 52 is activated, and thereafter, the disk cartridge 4
2 is pulled in by the driving force of the drive motor 56.
That is, FIG. 33 shows the “cartridge unload position” that defines the timing immediately before the automatic loading start timing. Incidentally, from the position shown in FIG. 32 to FIG.
While the disc cartridge 42 is inserted at the position shown in FIG. 3, the lower end of the shutter plate 38 is in sliding contact with the upper surface of the disc cartridge 42 by the biasing force of the torsion spring 228 described above.

When the automatic loading / unloading mechanism 52 starts to draw the disk cartridge 42 from the "cartridge insertion detection position" by the motor force, the automatic loading / unloading mechanism 52 causes the left control cam plate 102 to move. It starts to be moved and driven in the back direction along the insertion direction X. The control cam plate 104 on the right side is in the insertion direction X.
It will be driven to move to the front side in the opposite direction.
With the movement of the control cam plates 102 and 104, the cam pins 214 and 216 attached to the intermediate portions of the two rocking levers 210 and 212 have corresponding cam grooves 102c and 104c.
Of the first horizontal cam groove C ₁ relatively slides, and is displaced upward along the _second inclined cam groove C ₂ inclined upward of the cam grooves 102c and 104c. As a result, the two rocking levers 210 and 212 are moved to the support pin 20.
6 and 208, it is rotated clockwise in the figure against the biasing force of the torsion springs 218 and 220. As a result, until the state shown in FIG.
The tip of 10,212 will rise.

In the state shown in FIG. 34, the movable gear 2
The locking portion 230 formed at the rear of the gear 24 is the gear chassis 1
The top plate 118c of 18 is contacted from below. Therefore, while the disc cartridge 42 is being inserted from the position shown in FIG. 33 to the position shown in FIG. 34, the lower end of the shutter plate 38 is still in sliding contact with the upper surface of the disc cartridge 42 by the biasing force of the torsion spring 228. Is in a state.

When the disk cartridge 42 is further pulled into the cartridge holder 100 from the state shown in FIG. 34, the control cam plates 102 and 104 are synchronized with this.
Is further moved so that the cam pins 214 and 216 are brought into the third horizontal cam groove portion C ₃ which defines the uppermost position with the corresponding cam grooves 102c and 104c. Here, in a state where the swing levers 210 and 212 are rotated to the uppermost position, the locking portion 230 formed at the rear portion of the movable gear 224 is maintained in a state of being in contact with the top plate 118c of the gear chassis 118 from below. Therefore, as shown in FIG. 35, the movable gear 2
24 is rotated clockwise against the urging force of the torsion spring 228, and as a result, the shutter plate 38 to which the fixed gear 226 meshing with the movable gear 224 is attached is rotated counterclockwise. become.

In this way, the tip of the shutter plate 38 is lifted upward from the upper surface of the disc cartridge 42, and the interference with the disc cartridge 42 is avoided. The state shown in FIG. 35 is substantially irrelevant when loading the disc cartridge 42, but is required when unloading the disc cartridge 42. Further, in the state shown in FIG. 35, the disc cartridge 42 is completely inserted (pulled in) into the cartridge holder 100, and the “cartridge pull-in completion position” is defined.

As described above, the disk cartridge 42 is in the "cartridge receiving position" at the "cartridge pull-in completion position" shown in FIG.
Fully inserted inside, automatic loading / unloading mechanism 52
Stops the further inserting operation of the disc cartridge 42, but continues the moving operation of the control cam plates 102 and 104. As a result, the cam pins 214 and 216 are brought to the fourth inclined cam groove portion C ₄ which inclines downward corresponding to the corresponding cam grooves 102c and 104c, and the swing levers 210 and
212 will rotate downwards. Then, in response to the downward rotation of the swing levers 210 and 212, the movable gear 224 rotates counterclockwise by the urging force of the torsion spring 228, and the fixed gear 2 that meshes with the movable gear 224.
The shutter plate 38 to which 26 is attached rotates in the clockwise direction. In this manner, as shown in FIG. 36, the shutter plate 38 is in an upright state and comes into contact with the back surface of the front portion 26a of the loading chassis 26.

Incidentally, in response to the movement of the control cam plates 102, 104 from the state shown in FIG. 35 to the state shown in FIG. 36,
As will be described in detail later, the cartridge holder 100 has cam grooves 102a ₁ ; 102 for vertically moving the cartridge holder corresponding to the cam pins 106a to 106d attached thereto.
a _2, 104a _1; By relatively moving 104a _2, will be lowered from the "cartridge receiving position" to "cartridge loading position".

From the state shown in FIG. 36, when the control cam plates 102 and 104 are further moved, the control cam plate 10 is moved.
With the movement of 2, 104, the cam pins 214, 216 are displaced downward along the corresponding _fourth inclined cam groove portion C ₄ inclined downward of the corresponding cam grooves 102c, 104c. As a result, the two rocking levers 210, 212 are rotated about the support pins 206, 208 about the torsion springs 218, 2 respectively.
It is rotated counterclockwise in the figure in accordance with the biasing force of 20. As a result, both swing levers 210 and 212 descend until the state shown in FIG. 37 is reached. And
In the state shown in FIG. 37, the cam pins 214 and 216 are brought into the fifth horizontal cam groove portion C ₅ which defines the lowermost position of the corresponding cam grooves 102c and 104c, and the shutter plate 38 allows the chassis opening 36 to open its rear surface. Will completely block it.

By configuring the shutter plate opening / closing mechanism 40 as described above, the chassis opening is performed with the disk cartridge 42 not loaded and with the disk cartridge 42 completely loaded in the magneto-optical disk device 10. 36 is completely closed by the shutter plate 38, and the internal sealed state is maintained. As is clear from the above description, when the loaded disk cartridge 42 is unloaded, the shutter plate opening / closing mechanism 40 performs an operation that is completely opposite to the above-described loading operation. , The shutter plate 38 first rises, and stands by at a position above the disk cartridge 42 where it does not interfere with it.
After the disk cartridge 42 is completely taken out, the disk cartridge 42 descends and again operates to completely close the chassis opening 36.

In the shutter plate opening / closing mechanism 40 of this embodiment, the shutter plate 38 that closes the chassis opening 36 behind it is provided with the front portion 26a of the loading chassis 26 in which the chassis opening 36 is formed.
Is elastically pressed against the back surface of the device by the biasing force of the torsion spring 228. Both swing levers 210 and 212 are also urged downward by the urging forces of the corresponding torsion springs 218 and 220. As a result, even if a foreign object is inserted from the chassis opening 36 during the loading operation of the disc cartridge 42, the shutter plate 38 only escapes against the biasing force of the torsion springs 218, 220, 228. If the loading operation is locked in the middle,
A situation in which the shutter plate opening / closing mechanism 40 is damaged can be reliably avoided.

Next, (3) the automatic loading / unloading mechanism 52 for loading / unloading the disk cartridge 42 of the characteristic construction of this embodiment using the driving force of the drive motor 56, (4) ) A description will be given with reference to FIGS. 38 to 46 with a part of the timing detection mechanism 60 for detecting the timing such as the loading timing in the automatic load / unload mechanism 52.

This automatic load / unload mechanism 52
As shown in FIG. 38, the pair of left and right control cam plates 10 described above.
2, 104 and "cartridge unload position" (P
Disk cartridge 4 that was manually inserted up to 1)
2 and an engaging mechanism 232 (shown in FIGS. 17 and 18) that engages with each other, and the engaging mechanism 232 and the pair of left and right control cam plates 10 disposed on the bottom plate 118d of the gear chassis 118.
2, 104, and a drive mechanism 116 for moving and driving them. Further, the timing detection mechanism 60 detects that the disc cartridge 42 is in the “cartridge insertion detection position”.
And the timing brought to the "cartridge load position" (P3) and the timing brought to the "magnetic head load position" (P4) by the magnetic head 14 can be detected. .

This drive mechanism 116 is shown in FIGS.
As shown in FIG. 5, a drive motor 56 mounted on the bottom plate 118d of the gear chassis 118, a detection / drive gear 234 that similarly configures a timing detection mechanism 60 described later, and a drive force of this drive motor 56 are detected. A slide plate drive mechanism 264 for moving and driving the slide plate 268 to which the engagement mechanism 232 is attached based on the gear train 236 transmitted to the drive gear 234 and the driving force of the detection / drive gear 234.
Based on the driving force of the detection / drive gear 234 described above,
The control cam plate driving mechanism 280 for moving and driving the pair of left and right control cam plates 102 and 104 is roughly configured.

The mounting structure of the drive mechanism 116 will be described in detail below with reference to FIGS. 42 to 44.

First, as shown in FIG. 42, the gear chassis 1
The above-described drive motor 56 is mounted on the front center portion of the bottom plate 118d of 18 with its drive axis extending along a horizontal direction Y orthogonal to the insertion direction X. A worm gear 56a is attached to the motor shaft of the drive motor 56.
Is fixed. Also, the bottom plate 1 of the gear chassis 118
Three driven gears 238, 240, 242 (which will be described later) that constitute a gear train 236 are provided on the left front portion of the 18d.
Are rotatably rotatably supported by shaft support pins 244, 246, respectively.
248 have been planted. On the other hand, on the left rear portion of the bottom plate 118d of the gear chassis 118, a shaft support pin 252 is rotatably supported and rotatably supports a detection lever 250 (described later) that constitutes a timing detection mechanism 60 described later. . To the left of the drawing in the figure from the position where the shaft support pin 252 is planted, a first arc-shaped first centered around the shaft support pin 252 is formed.
Is formed with a guide groove 254. Further, in front of the first guide groove 254, the detection / drive gear 234 is provided.
A pivot pin 256 is rotatably rotatably supported.

As shown in FIG. 43, driven gears 238, 240, 242 and a detection lever 250 are mounted on the structure shown in FIG.

That is, the above-mentioned shaft support pin 244 has the first
The driven gear 238 is rotatably supported, and the first driven gear 238 has a large diameter worm wheel portion 238a meshing with a worm gear 56a attached to the motor shaft of the drive motor 56 and a small diameter flat wheel 238a. It is integrally configured with the gear portion 238b. A second driven gear 240 is rotatably supported by the shaft support pin 246, and the second driven gear 240 is the first driven gear 23.
The spur gear portion 240a having a large diameter and the spur gear portion 240b having a small diameter are meshed with each other. A third driven gear 242 is rotatably supported by the shaft support pin 248, and the third driven gear 242 meshes with a small-diameter spur gear portion 240b of the second driven gear 240. At the same time, it is adapted to mesh with the large-diameter spur gear portion 234a of the detection / drive gear 234 described above.

The first to third driven gears 238, 240 and 242 thus mounted to the gear train 236.
Is configured, so that when the drive motor 56 is started,
Through the gear train 236, the detection / drive gear 23
4 will be driven to rotate.

On the other hand, the above-mentioned detection lever 250 is rotatably supported by the above-mentioned shaft support pin 252 while being positioned below the bottom plate 118c of the gear chassis 114. The detection lever 250 is formed in a substantially T-shape in a plan view, and is pivotally supported by the shaft support pin 252 at the T-shaped right shoulder portion. Further, this detection lever 250 is
A torsion spring 258 wound around the shaft support pin 252 is urged to rotate counterclockwise in the drawing. Here, the T-shaped left shoulder portion of the detection lever 250 is detected by a third detection sensor 260 (shown by a chain line in the figure) which constitutes a timing detection mechanism 60 described later. The piece 250a is integrally provided in an upright state and taken out above the bottom plate 118c of the gear chassis 114. In addition, on the lower end of the T-shape of the detection lever 250, the above-mentioned first guide groove 254 is formed.
The bottom plate 118 of the gear chassis 118.
A driven pin 262 that is taken out above c is planted.

When the driven pin 262 is located at the front end portion of the first guide groove 254 by the biasing force of the torsion spring 258 described above, the "cartridge unload position" is set.
(P1) is defined, and the detected piece 250a of the detection lever 250 to which the driven pin 262 is attached is set so as to deviate to the front side from the detection range of the third detection sensor 260 and turn it on. ing. In addition, the driven pin 262 resists the biasing force of the torsion spring 258,
At the time when the front end of the first guide groove 254 is moved slightly rearward (that is, the detection lever 250 is slightly rotated clockwise), the “cartridge insertion detection position” is defined,
Detection lever 250 to which this driven pin 262 is attached
The detected piece 250a is set to enter the detection range of the third detection sensor 260 and turn it off. Further, the driven pin 262 is connected to the first guide groove 2
At the time when the driven pin 262 is moved to the middle of 54,
Detected piece 250a of the detection lever 250 to which is attached
Is set to deviate rearward from the detection range of the third detection sensor 260 and turn it on. still,
The magnetic head 16 is set to be brought to the “magnetic head load position” (P4) with the driven pin 262 positioned at the rear end of the first guide groove 254.

In addition to the structure shown in FIG. 43, as shown in FIG. 44, the detection lever 25 is provided on the gear chassis 118.
The slide plate 264, which will be described later, is positioned above 0.
Of the disk cartridge 42 engaged with the slide plate 264 via the engagement mechanism 232 described later, between the "cartridge insertion detection position" and the "cartridge pull-in completion position" (P2). A pull-in link 266 that constitutes a slide plate drive mechanism 264 for reciprocating between them is attached. The pull-in link 266 functions as a detection lever that detects that the disc cartridge 42 has been inserted from the "cartridge unload position" (P1) to the "cartridge insertion detection position", that is, one of the timing detection mechanisms 60. It is also configured to function as a section.

Specifically, the pull-in link 266 described above is used.
Is formed in a substantially T shape in a plan view, and is pivotally supported by the above-mentioned shaft support pin 252 at the T-shaped right shoulder portion. On the T-shaped left shoulder of the pull-in link 266,
A bifurcated portion 266a is formed. As shown in FIG. 18, the bifurcated portion 266a is formed with a pin 270 that is planted on a slide plate 268 that is moved along the insertion direction X when the disc cartridge 42 is inserted. Are engaged while being hugged. That is, according to the sliding movement of the slide plate 268, the pull-in link 266 is rotationally driven around the shaft support pin 252.

Here, this slide plate 268 is shown in FIG.
As shown in FIG. 18, the cartridge holder 100 is slidably arranged on the left side of the top plate 100a along the insertion direction X, and its rear end is bent downward and inserted. It is defined as an engagement piece 268a that engages with the tip of the disc cartridge 42. This engaging piece 268
In the state where the slide plate 268 is at the position corresponding to the "cartridge unload position" (P1), the front end of the disc cartridge 42 does not abut, and the disc cartridge 42 moves to the "cartridge unload position" (P1).
When the disk cartridge 42 is further inserted after passing 1), the tip of the disk cartridge 42 comes into contact with it,
It is pushed in along the insertion direction X, and as a result, the slide plate 268 is slid backward along the insertion direction X.

On the other hand, at the rear end of the slide plate 268, with the insertion of the disc cartridge 42, which has been inserted up to the "cartridge unload position" (P1), up to the "cartridge insertion detection position", An engaging mechanism 232 for engaging with and being further pulled in by the driving force of the drive motor 56 (that is, automatically loaded) is attached. The engaging mechanism 232 includes a shaft support pin 272 that is planted in a state of standing on the lower surface of the rear end of the slide plate 268, and a cartridge hook 274 that is rotatably supported by the shaft support pin 272. It is configured with. The cartridge hook 274 is formed in a substantially L shape in a plan view and is pivotally supported by the pivot pin 272 at its bent portion. Further, the cartridge hook 274 is set so that one piece 274 a thereof can be brought into contact with the disc cartridge 42, and
The other piece 274b extends toward the front side of the shaft support and is formed so that its tip can engage with the hook groove 42e of the disc cartridge 42 shown in FIGS. 5 and 6. And this cartridge hook 274
Is rotatable between an engaging position in which the other piece 274b thereof engages with the hook groove 42e of the disc cartridge 42 and a retracted position in which it does not engage.

Here, the tip end surface of the other piece 274b of the cartridge hook 274 is formed of a tapered surface, and even when it is in the engagement position, the tip end portion of the inserted disk cartridge 42 is It is set so as to be pushed to the left end and once rotated to the outer retracted position. In the state of being rotated to the retracted position in this manner, the other end portion 274b of the cartridge hook 274 has a clearance sufficient to allow the disc cartridge 42 to pass on the side thereof. In order to secure the space between the side surfaces 100c of the cartridge holder 100 and the inclined surfaces 42c and 42d, a side opening 100g through which the other piece 274b of the cartridge hook 274 passes is formed. There is.

As described above, the disk cartridge 42 that has once passed the side of the cartridge hook 274 that has been rotated to the retracted position has one end 274a of the cartridge hook 274 in contact with the left end of its tip. The sliding plate 2 is rotated from the retracted position to the engaging position and abuts on the engaging piece 268a of the sliding plate 268,
68 is slightly pushed in along the insertion direction X and moved (slide). As a result, this cartridge hook 274
The other piece 274b is engaged with the hook groove 44e, and the cartridge hook 274 and the disk cartridge 42 are moved integrally along the insertion direction X. Further, when the cartridge hook 274 is engaged with the disc cartridge 42 in this manner, the cartridge hook 274 is slightly pushed and moved along the insertion direction, so that the outer surface of the other piece 274b of the cartridge hook 274 has the above-mentioned side. From the opening 100g, by the inner surface of the side plate 100c,
Moving to the retracted position is prohibited. Accordingly, the cartridge hook 274 is maintained in the state of being engaged with the disc cartridge 42 in response to the driving movement of the cartridge hook 274, and the disc cartridge 42 is moved along the insertion direction X in the "cartridge pull-in completion position" (P2). ) Can be pulled in and driven (automatic loading).

That is, as described above, when the manually inserted disc cartridge 42 is in the "cartridge unload position" (P1), the cartridge hook 2
When the disc cartridge 42 is manually inserted from the "cartridge unloading position" (P1) to the "cartridge insertion detection position" by abutting on one of the one side portions 274b of the cartridge 74, the cartridge hook 274 is moved from the retracted position. The retracting link 266 that engages with the pin 270 planted in the slide plate 268 is rotated slightly to the clockwise direction in FIG. 44 while rotating to the engaging position to engage the cartridge hook 274 with the disc cartridge 42. Turn to. In response to the clockwise movement of the pull-in link 266, the side edge of the pull-in link 266 engages with the detected piece 250a of the detection lever 250, and the detected piece 2
The detection lever 250 to which 50a is integrally attached,
It is rotated slightly clockwise in the clockwise direction against the biasing force of the torsion spring 258.

As a result, as described above, the third detection sensor 260 changes its detection state from the ON state to the OFF state, and the third detection sensor 260 will be described in detail later.
The control circuit determines that the disk cartridge 42 has been inserted up to the “cartridge insertion detection position” in response to the change from the ON state to the OFF state, and activates the drive motor 56. The plate 268 is moved and driven along the insertion direction X by the driving force of the drive motor 56, and the cartridge hook 2
By moving 74, the disk cartridge 42 is pulled in to the "cartridge retracting completion position" (P2) in the cartridge holder 100 in the "cartridge receiving position".

Here, this slide plate drive mechanism 264
44, in addition to the pull-in link 266 described above, as shown in FIG. 44, the drive pin 276 erected at the lower end of the T-shape of the pull-in link 266 and the detection / drive gear 234 as shown in FIG. A drive cam groove 278 is formed on the lower surface, and the drive pin 276 is fitted from below. That is, as the detection gear 234 is rotationally driven by the driving force of the drive motor 56 via the gear train 236 described above, the pull-in link 266 is moved based on the change in the engagement position between the drive cam groove 278 and the drive pin 276. It is driven to rotate in the clockwise direction, and as a result, this pull-in link 2
The slide plate 268 to which the pin 270 engaging with 66 is attached is driven to slide along the insertion direction X. Therefore, in response to the slide drive of the slide plate 268, the cartridge hook 27 attached to the slide plate 268 is attached.
The disk cartridge 42 that engages with No.
The cartridge will be automatically drawn to the "cartridge pull-in completion position" (P2).

After the pull-in operation by the slide plate drive mechanism 264, the pair of left and right control cam plates 102 and 104 are further moved and driven by the control cam plate drive mechanism 280, as will be described later. By lowering the cartridge holder 100 from the "cartridge receiving position" to the "cartridge loading position" (P3), the disc cartridge 42 can be automatically loaded.

Next, the left and right control cam plates 102 and 104 are moved and driven by the driving force of the drive motor 56, whereby the cartridge holder 100 is moved to the "cartridge receiving position" and the "cartridge loading position" (P3) of the disk cartridge 42. ) Of the control cam plate drive mechanism 280 for vertically moving the magnetic head mounting base 62 between the “standby position” and the “magnetic head loading position” (P4) of the magnetic head 14. The configuration will be described.

First, the control cam plate drive mechanism 280
As shown in FIG. 38 again, the bottom plate 11 of the gear chassis 118 is
The link arm 284, which is rotatably supported at its central position via a shaft support pin 282, engages with the pair of left and right control cam plates 102, 104 at the substantially central portion of 8d, and the above-described detection / A transmission arm assembly 286 that releasably transmits the rotation of the drive gear 234 to the link arm 284.
And the magnetic head 14 at the “magnetic head load position” (P
4) The link arm 284 moved so as to be positioned in
Forced return mechanism 2 to forcefully return to the "intermediate position"
And 88. Here, the forced return mechanism 288 uses electromagnetic force to determine the rotational position of the link arm 284 that moves the magnetic head mounting base 62 so that the magnetic head 14 is positioned at the "magnetic head load position" (P4). Electromagnetic solenoid 2 that holds it releasably
Equipped with 90.

The structure of the control cam plate drive mechanism 280 will be described below with reference to FIGS. 38 and 42 to 46.

First, as shown in FIG. 42, the gear chassis 1
On the lower surface of the bottom plate 118d of 18, the above-described link arm 284 is provided at the center portion thereof via the pivot pin 282.
It is rotatably supported by a substantially central portion of 8d. A pair of left and right control cam plates 10 are provided on both ends of the link arm 284.
Engagement pins 292a and 292b which are fitted into the engagement recesses 102e and 104e of 2, 104 from below are attached in a state of protruding upward. In this manner, the pair of left and right control cam plates 102 and 104 are driven to move in opposite directions.

On the other hand, the bottom plate 118d of the gear chassis 118
The electromagnetic solenoid 290 described above is mounted on the right rear part of the with the attracting surface 290a facing rightward. Further, on the right side of the bottom plate 118d of the gear chassis 118, a long arc-shaped second guide groove 294 and a second guide groove 294 having a long arc shape with the shaft support pin 282 rotatably supporting the link arm 284 as the center of rotation are provided. An arc-shaped third guide groove 296 having a shorter diameter and shorter length than the groove 294 is formed. Here, the drive pin 298 is planted on the link arm 284 while penetrating the second guide groove 294 from below. Therefore, this drive pin 298
Is slid in the second guide groove 294, the link arm 284 is driven to rotate around the shaft support pin 282. In other words, the rotation range of the link arm 284 is regulated at the front and rear ends of the second guide groove 294. Further, the bottom plate 118d of the gear chassis 118
A shaft support pin 302 is rotatably mounted on the right front part of the shaft supporter so that a solenoid arm 300, which will be described later, is rotatably supported.

As shown in FIG. 43, the solenoid arm 300 described above and the eject arm 304 constituting the forced return mechanism 288 are mounted on the structure shown in FIG.

That is, the gear chassis 11 is attached to the shaft support pin 282 that rotatably supports the link arm 284 described above.
The eject arm 304 is rotatably supported while being positioned on the bottom plate 118d of No. 8. The lower surface of the eject arm 304 has the above-described third guide groove 29.
A guide pin 306 which is inserted from above in 6 is planted. The solenoid arm 300 is rotatably supported at the front end of the shaft support pin 302 described above. The rear end of the solenoid arm 300 extends to the vicinity of the electromagnetic solenoid 290 described above. Then, at the rear end of the solenoid arm 300, the attracting piece 3 attracted by being excited by the electromagnetic solenoid 290.
00a is attached.

This solenoid arm 300 has a shaft support pin 3
A torsion spring 308 wound around 02 applies a turning force counterclockwise in the drawing. Therefore, even when the electromagnetic solenoid 290 is demagnetized, the solenoid arm 300 is rotationally biased toward the electromagnetic solenoid 290 by the biasing force of the torsion spring 308. In this state where the electromagnetic solenoid 290 is demagnetized, the left side surface of the solenoid arm 300 excluding the locking portion 300b (described in detail later) formed in a recessed state in the front portion thereof, Link arm 2
In the state where the drive pin 298 planted in 84 is elastically abutted by the biasing force of the torsion spring 308 described above, the attracting piece 300a is attached to the attracting surface 290a of the electromagnetic solenoid 290.
Away from.

That is, at the front of the solenoid arm 300, the "magnetic head load position" (P
4) for locking the drive pin 298 implanted in the link arm 284 rotated to define the "magnetic head load position" (P4), in other words, the link. A locking portion 300b for preventing the arm 284 from returning from a position defining the "magnetic head load position" (P4) of the magnetic head 14 toward a position defining the "intermediate position" is formed in a step shape. ing.

Then, the drive pin 298 moves forward along the second guide groove 294, and the solenoid arm 30
The solenoid arm 300 is disengaged from the left side surface of the solenoid arm 300 and the drive pin 298 in the state of being brought to the locking portion 300b of 0, and is rotated counterclockwise in the figure by the biasing force of the torsion spring 308. As a result, the attraction piece 300a mechanically contacts the attraction surface 290a of the electromagnetic solenoid 290. In this contact state, the electromagnetic solenoid 2
When 90 is demagnetized, the locking portion 300b is pushed along with the returning operation of the drive pin 298, and the solenoid arm 300 having this is rotated clockwise against the biasing force of the torsion spring 308. , And again,
The state where the drive pin 298 is engaged with the left side surface of the solenoid arm 300 is restored.

On the other hand, by attracting the attraction piece 300a in response to the excitation of the electromagnetic solenoid 290, the solenoid arm 300 adds to the urging force of the torsion spring 308 and further the electromagnetic attraction force.
It is strongly adsorbed to the adsorption surface 290a of 0, and the rotation position is fixed. As a result, in this attracted state, the drive pin 298 is locked by the locking portion 300b of the solenoid arm 300 and is prohibited from moving rearward, that is, the link arm 284 causes the magnetic head 14 to move to the "magnetic head load position" (P4). ) Will be prevented from returning to the position defining the "intermediate position" from the position defining ".

As shown in FIG. 44, a gear arm 310 constituting a transmission arm assembly 286 is mounted on the structure shown in FIG. 43 while being mounted on the eject arm 304. This gear arm 310
Is rotatably supported by the above-mentioned shaft support pin 282 at the substantially central portion thereof. At the left end of the gear arm 310 in the drawing, a fan-shaped gear portion 310a that meshes with a small-diameter spur gear portion 234a of the detection / drive gear 234 that is taken out in FIG. on the other hand,
The right end portion 310b of the gear arm 310 in the drawing passes in front of the drive pin 298 planted in the link arm 284 and extends to a position that covers the second guide groove 294 described above. On the right end portion 310b, a shaft support pin 314 for rotatably supporting the lock arm 312 constituting the transmission arm assembly 286 is planted.

On the gear arm 310 shown in FIG. 44, as shown again in FIG. 38, the lock arm 312 is mounted in a state of being pivotally supported by the pivot pin 314. The lock arm 312 is biased by a torsion spring 316 wound around a shaft support pin 314 so as to rotate clockwise in the drawing. Here, the lock arm 312 is formed in a substantially L shape in a plan view, and is supported by the shaft support pin 314 at its bent portion. A recess 312b into which the drive pin 298 is removably fitted is formed on the right side surface of the base end of the one piece 312a extending rearward along the loading direction X of the lock arm 312. ing.

Here, no external force acts on the lock arm 312, and the recess 312b is in a position rotated clockwise by the urging force of the torsion spring 316 in the figure.
Is set so that the drive pin 298 is fitted therein.
Then, in this fitted state, the lock arm 312 is set to be brought into a state of engaging with the drive pin 298 (that is, a state of locking the drive pin 298) with respect to the rotation direction of the link arm 284. Incidentally, this recess 312
The surface defining the front side edge of b is the above-mentioned gear arm 3
It is set so as to be substantially vertically aligned with the rear end surface of the right end portion 310b of the device 10.

As a result, the recess 31 of the lock arm 312 is
With the drive pin 298 fitted in 2b, the gear arm 310 to which the lock arm 312 is attached is
The link arm 284 to which the drive pin 298 is attached is driven to rotate clockwise by rotating the shaft support pin 282 clockwise from the illustrated state. That is, the driving force of the drive motor 56 is transmitted to the link arm 284 via the above-mentioned transmission arm assembly 286, whereby the pair of left and right control cam plates 102 and 104 are provided.
Are driven to move in opposite directions.

On the other hand, the other piece 312c of the above-mentioned lock arm 312 is formed so as to be able to contact the above-mentioned shaft support pin 302. More specifically, it is set so as to come into contact with the shaft support pin 302 immediately before the drive pin 298 reaches the front end of the second guide groove 294 with the gear arm 310 rotated clockwise. In this way, the other piece 31
After 2c abuts on the shaft support pin 302, the gear arm 310 further rotates clockwise, and the drive pin 298 reaches the front end of the second guide groove 294, so that the lock arm 312 causes the torsion spring 316 to rotate. It is rotated counterclockwise against the urging force of, and the engagement state between the recess 312b and the drive pin 298 is released. In this manner, with the engagement between the recess 312b and the drive pin 298 being released, the drive pin 298 can be returned and moved. In other words, the link arm 284 to which the drive pin 298 is attached is rotated counterclockwise. It becomes a state that can be rotated.

When the magneto-optical disk device 10 is stopped from supplying power due to a power failure or the like, the drive of the spindle motor 44 is stopped, and as a result, the magneto-optical disk 12 in the disk cartridge 42 is stopped. The rotation stops. As described above, the magnetic head 14 is set so as to be slightly lifted from the surface of the magneto-optical disk 12 by the wind pressure generated when the magneto-optical disk 12 rotates. Therefore, when the drive of the spindle motor 44 is stopped and the rotation of the magneto-optical disk 12 begins to gradually decrease, the action of the wind pressure becomes weak. As a result, the magnetic head 14 drops due to the load beam load and is still rotating due to inertia.
There is a risk of contact with the surface and damage. Therefore, in this embodiment, when the magneto-optical disk device 10 is stopped from being supplied with power due to a power failure or the like, the magnetic head 14 uses the spring force to "magnetic head load position" (P4). To the "intermediate position" is provided with a forcible return mechanism 288 configured to be lifted in a mechanically forcibly returned state.

In other words, the forced return mechanism 288 includes the above-mentioned electromagnetic solenoid 290 and the eject arm 304.
And the eject arm 304 and the electromagnetic solenoid 2
And a return spring 318 that hangs the eject arm 304 so as to rotate the eject arm 304 counterclockwise around the pivot pin 282. Specifically, on the lower surface of the eject arm 304, the eject pin 320 penetrating downward through the above-mentioned third guide groove 288 is planted in a standing state. A link arm 284, which has been driven to rotate clockwise, is engaged with the eject pin 320, and the eject pin 32
The eject arm 304 to which 0 is attached is set to rotate clockwise against the urging force of the return spring 318.

Here, in a state where the eject pin 320 is forcibly held at the front end position of the third guide groove 296 by the link arm 284 against the urging force of the return spring 318, the eject arm 320 is moved by the link arm 284. The position of the pair of left and right control cam plates 102, 104 is defined as the motor stop position, the magnetic head 14 is at the "magnetic head load position" (P4), and the cartridge holder 10 is in position.
0 is positioned at the "cartridge load position" (P3), respectively, and the return spring 318 is charged with an urging force for forcibly returning the magnetic head 14 from the "magnetic head load position" (P4) to the "intermediate position". Is set to. On the other hand, when the holding force for holding the link arm 284 at the front end position of the third guide groove 296 is released, the eject pin 320 is moved to the third guide groove by the biasing force of the charged return spring 318. It will be rotated to the rear end position of 296. Here, the link arm 284 that engages with this eject pin 320
Will be rotated in the same way. In this way, the pair of left and right control cam plates 102 and 104 defined by the link arm 284 that engages with the eject pin 320 returned to the rear end position of the third guide groove 296 moves the magnetic head 14 to the "intermediate position". It is positioned so that it is regulated by.

On the other hand, as described above, the link arm 284
It is set so that the drive pin 298, which is planted in the lock lever 312, is unlocked by the lock lever 312 when the drive pin 298 is moved to the front end portion of the second guide groove 294. The urging force of the return spring 318 causes the arm 284 to be forcibly returned to the position corresponding to the "intermediate position". For this reason, in this embodiment, the forced return mechanism 288 has the lock lever 31.
Before the drive pin 298 is unlocked by 2
The electromagnetic solenoid 290 is excited, and the solenoid arm 300 is urged to rotate counterclockwise with the urging force of the torsion spring 308 being applied. As a result, the solenoid arm 300 comes into contact with the drive pin 298 from the side, and the drive pin 298 is in the “magnetic head load position”.
Until the position immediately before the position corresponding to (P4) is reached, the solenoid arm 300 moves while slidingly contacting the left side edge of the solenoid arm 300. Then, when the drive pin 298 moves to a position corresponding to the "magnetic head load position" (P4), the drive pin 298 faces the locking portion 300b of the solenoid arm 300, and the attraction piece 300a of the solenoid arm 300 causes the electromagnetic solenoid 29 to move.
It is rotated with the biasing force of the torsion spring 308 applied so that it is attracted to the attraction surface of 0. In this manner, in the state where the solenoid arm 300 is attracted by the electromagnetic solenoid 290, the drive pin 298 replaces the recess 312 of the lock lever 312 and replaces the solenoid arm 30 with the drive pin 298.
The locking portion 300b of 0 holds the locked state at the front end portion of the second guide groove 294.

That is, in the control cam plate drive mechanism 280 of this embodiment, the drive pin 298 embedded in the link arm 284 for engaging and moving the pair of control cam plates 102 and 104 is , Until the magnetic head 14 is moved from the position corresponding to the "standby position" to the position corresponding to the "magnetic head load position" (P4) through the position corresponding to the "intermediate position". A lock arm 312 attached to a gear arm 310 that is rotated around a support pin 282 is locked so as to rotate integrally with the gear arm 310. ]
In the state brought to the position corresponding to (P4), the locked state by the lock arm 312 is released, and instead,
It is locked by the solenoid arm 300 that is firmly held at the locked position by the excited electromagnetic solenoid 290.

Therefore, the forced return mechanism 28 of this embodiment is
8, the state in which the magnetic head 14 is locked at the "magnetic head load position" (P4) by the solenoid arm 300 is maintained as long as the electromagnetic solenoid 290 is excited. When the power supply is stopped due to a power failure or the like, the electromagnetic solenoid 190 is automatically demagnetized, and as a result, the solenoid arm 30
0 is returned to a state in which it is rotationally biased counterclockwise only by the biasing force of the torsion spring 308. As a result, due to this demagnetization, the locked state of the drive pin 298 is substantially released. In this way, the link arm 284 is moved by the magnetic head 14 to the "magnetic head load position".
As shown in (P4), the holding force for holding the link arm 284 is released. Therefore, in the link arm 284, the eject arm 304 to which the eject pin 320 contacting the link arm 284 is attached is biased by the return spring 318. By this, it will be rotated back in the counterclockwise direction. As the link arm 284 is returned to rotate, the magnetic head 14 is forcibly returned from the "magnetic head load position" (P4) to the "intermediate position".

In the automatic loading / unloading mechanism 52 configured as described above, the disk cartridge 42 loaded in the "cartridge loading position" (P3) in the magneto-optical disk device 10 is unloaded. At this time, the drive motor 56 is rotationally driven (reverse rotation) in the direction opposite to that at the time of loading, so that the disc cartridge 42 can be pulled out by the drive force of the drive motor 56 to the "cartridge unload position" (P1). You can do it.

As described above in detail, the "cartridge insertion detection" defined slightly behind the "cartridge unload position" (P1) past the "cartridge unload position" (P1) shown in FIG. The automatic loading / unloading mechanism 52 is activated by manually inserting the disc cartridge 42 to the “position”. Then, by the automatic loading / unloading mechanism 52 thus activated, the disc cartridge 42 is
The "cartridge insertion detection position" to the "cartridge loading position" (P3) are automatically loaded by the driving force of the drive motor 56.

Therefore, it is not necessary for the operator to manually insert the disc cartridge 42 into the magneto-optical disc device 10, but after inserting the disc cartridge 42 halfway, the magneto-optical disc cartridge 42 is automatically pulled in. The operability of loading the cartridge 42 is extremely good. Also, "Cartridge load position" (P
When unloading from 3), it is automatically unloaded from here to the "cartridge unload position" (P1) by the driving force of the drive motor 56. As a result, the operator only needs to hold the partially pulled-out disc cartridge 42 and pull it out, and the operability of the unloading operation is greatly improved.

Particularly, in the loading operation, the cartridge hook 274 of the engaging mechanism 232 is inserted through the engaging mechanism 232.
Is engaged with the hook groove 42e of the disc cartridge 42 from the side, the engagement state of the disc cartridge 42 at the time of loading is ensured, and as a result, this loading operation is executed in an extremely stable state. Will be

In particular, since the driving force of the drive motor 56 is utilized in the unloading operation,
The disc cartridge 42 is surely unloaded to the "cartridge unload position" (P1),
For example, as compared with the case of unloading by using the spring force, the disk cartridge 42 is mounted on the chassis opening 3
Even if it is not discharged from 6, it is also discharged vigorously,
The entire disc cartridge 42 is pulled out from the chassis opening 36, and there is no fear that it will fall onto the floor and be damaged.
An extremely stable discharge operation will be achieved.

Next, (4) the timing detecting mechanism 60 for detecting the loading timing of the disk cartridge 42 and the loading timing of the magnetic head 14 having the above-mentioned characteristic structure will be described with reference to FIGS. 46 to 79.

First, the configuration of the detection / drive gear 234, which is also defined as a component of the drive mechanism 116 described above, will be described in detail with reference to FIG.

That is, as shown in FIG. 46, the detecting / driving gear 234 is rotatably supported by the above-mentioned shaft support pin 256 and functions as the drive mechanism 116. A large-diameter gear portion 234b that meshes with the third driven gear 248 is provided around the outermost circumference thereof. Through this meshing, the drive force in the positive direction of the drive motor 56 causes the detection / drive gear 234 to rotate counterclockwise in FIG. 38, and the rotation force of the detection / drive gear 234 is
In the automatic load / unload mechanism 52, the drive cam groove 278 and the drive pin 276 of the slide plate drive mechanism 264 are included.
Is transmitted to the slide plate 268 via the pull-in link 266, and is transmitted to the link arm 284 in the control cam plate drive mechanism 280 via the transmission arm assembly 286.

On the other hand, on the upper surface of the detection / drive gear 234, there are provided a portion functioning as the timing detection mechanism 60, that is, "cartridge insertion detection position", "cartridge load position" (P3), "magnetic head load position" (P).
4) to detect the first and second detection ribs 322,
324 are respectively standing up from the upper surface, and
It is formed in a circular arc shape centered on the shaft support pin 256. Here, the first detection rib 322 is provided on the outer periphery,
In addition, the second detection ribs 324 are respectively arranged on the inner circumference, and the slits 322a are formed at predetermined positions of the first detection ribs 322.

Further, the timing detection mechanism 60 is provided with first and second detection sensors 326 and 328 in addition to the above-mentioned third detection sensor 260, and both detection sensors 32 are provided.
6, 328 are set to be in the ON state unless the first or second detection ribs 322, 324 corresponding to the respective detection ranges enter. In other words, the first detection sensor 326 has the first detection rib 32 within its detection range.
2 is turned off, and the second detection sensor 328 is set to be turned off when the second detection rib 324 enters the detection range of the second detection sensor 328. In addition, the slit 322a described above is accompanied by the rotation of the detection / drive gear 234.
When this enters the detection range of the corresponding first detection sensor 326, this first detection sensor 326 is turned on for a predetermined time, for example, in this embodiment, about 20 ms.
It is set to turn on ec.

Here, the first detection rib 322 is the first at the position corresponding to the "cartridge insertion detection position".
The detection sensor 326 of is turned on and detected from here.
The first detection sensor 326 is turned off only from the time when the drive gear 234 slightly rotates counterclockwise until the magnetic head 14 is brought to the position corresponding to the “magnetic head load position” (P4). Is set to. In addition, the formation position of the slit 322a described above is
The time when the detection sensor 326 is turned on is set so as to correspond to the timing appropriate for demagnetizing the electromagnetic solenoid 290 in the unloading operation. On the other hand, the second detection rib 324 detects from the position corresponding to the "cartridge unload position" (P1) to the position corresponding to the "cartridge load position" (P3).
While the drive gear 234 is rotated, the second detection sensor 32
8 is turned on and the "cartridge load position" (P
It is set to turn off at the timing when 3) is reached.

Further, the above-mentioned third detection sensor 260
Has already been described as being turned on and off based on the detected piece 250a of the detection lever 250. Particularly, this detected piece 250a is pushed by the pull-in link 266 to cause the "cartridge unload position" (P1). "Cartridge unloading position"
It has already been described that the third detection sensor 260 is turned off with the movement from (P1) to the "cartridge insertion detection position". Here, on the driven pin 262 of the detection lever 250 that has been moved to the position corresponding to the “cartridge loading position”, the link arm 284 that is rotationally driven according to the operation of the control cam plate drive mechanism 280 described above is The magnetic pin is contacted at a point immediately before the rotational position corresponding to the magnetic head load position (P4) when it is rotated in the clockwise direction, and the driven pin 262 is set to be rotationally driven in the clockwise direction. There is. In this way, the detected piece 250a of the detection lever 250 to which the driven pin 262 is attached is
The link arm 284 moves to the “magnetic head load position” (P
As a result of moving to 4), it comes out of the detection range of the third detection sensor 260 and is turned on.

Here, these first to third two detection sensors 326, 328 and 260 are as shown in FIG.
It is attached to the lower surface of the synchro servo board 120 while being directly mounted on a synchro servo circuit (not shown). In the timing detection mechanism 60, the detection / drive gear 234 is set to the “cartridge unload position” by using the first and second detection sensors 326 and 328.
(P1) and "cartridge load position" (P3),
It is set so that it can be detected that it is in a position corresponding to any of the three positions of the "magnetic head load position" (P4). Then, these first and second detection sensors 3
26, 328, the detection / drive gear 234 is detected to be at the position corresponding to the “cartridge unload position” (P1), and the third detection sensor 260 is turned off to insert the disk cartridge 42, that is, , Is set so as to detect the timing when the disc cartridge 42 is brought to the “cartridge insertion detection position”. In addition, these first and second detection sensors 326, 3
When the detection / driving gear 234 is detected to be in the “magnetic head load position” (P4) by 28, the third detection sensor 260 is turned off to turn the magnetic head 14 into the “magnetic head load position” (P4). It is set to detect the start timing of the unloading operation from.

Here, as described above, the "cartridge insertion detection position" of the disk cartridge 42 is the disk cartridge 4 that has been manually inserted by the operator.
2 tip is "cartridge unload position" (P1)
In contact with the engaging portion 268a of the slide plate 268,
This is pushed slightly along the loading direction X, and the pushing movement of the slide plate 268 causes the pull-in link 266 to rotate, and the detection lever 250 rotates in response to the rotation of the pull-in link 266. The detected piece 250a is detected by turning off the third detection sensor 260 in accordance with the rotation of the. On the other hand, in response to the rotation of the detection / drive gear 234, the drive cam groove 278 and the pull-in link 2 formed on the lower surface of the detection / drive gear 234.
By changing the engagement position with the drive pin 276 planted in 66, the pull-in link 266 is rotated, and the slide plate 268 is moved in accordance with the rotation of the pull-in link 266. After the insertion detection timing, the load is automatically loaded by the driving force of the drive motor 56. However, since the drive motor 56 is not activated at the time of detecting the insertion described above, the detection / drive gear 234 is in a non-rotatable state due to the configuration of the gear train 236 described above.

Therefore, in this embodiment, for example,
Even if the detection / drive gear 234 cannot rotate due to the non-activation of the drive motor 56, the pull-in link 26
6 is allowed, in other words, the retractable link 2
The drive pin 276 implanted in the 66 is used for the detection / drive gear 2
34. The torsion wound around the cylindrical boss portion 234c formed coaxially with the center of rotation on the upper surface of the detection / drive gear 234 in order to permit movement within the drive cam groove 278 formed on the lower surface of the gear 34. The spring 330 is provided. This torsion spring 330 has one end 330 as shown in FIG.
is locked to the detection / drive gear 234 at a, and the other end 330b
Is elastically abutted on the clockwise end face of a recess 234d formed between the outer periphery of the boss portion 234c and the inner periphery of the first detection rib 322. Then, the drive pin 276 described above is set in contact with the other end 330b of the torsion spring 330.

In this way, the disc cartridge 42
"Cartridge unload position" to detect insertion of
The movement of the drive pin 276 due to the clockwise rotation of the pull-in link 266 around the pivot pin 252 from (P1) to the "cartridge insertion detection position" simply causes the other end 330b of the torsion spring 330 to elastically move. The detection / drive gear 23 that is stopped just by deforming it counterclockwise
It will be possible not to affect 4. On the other hand, the detection / drive gear 234 is driven to rotate counterclockwise in response to the activation of the drive motor 56 after the detection of the insertion of the disc cartridge 42, but according to the rotation of the detection / drive gear 234. , The drive pin 276 is moved based on the cam surface shape of the drive cam groove 278, and the pull-in link 266 in which the drive pin 276 is planted is attached to the pivot pin 2.
It will be rotated clockwise around 52.

The timing detection operation in the timing detection mechanism 60 configured as described above will be described with reference to FIGS.
This will be described with reference to the timing charts shown in FIG. 6 and the operation state diagrams shown in FIGS.

First, in each of the timing charts shown in FIGS. 47 to 53, “PS-A” indicates the detection signal from the first detection sensor 326, and “PS-B” indicates the detection signal from the second detection sensor 328. The detection signal, "PS-C" is the third
The detection signals from the detection sensor 260 of FIG.
Further, in the figure, “SOLE” indicates a control signal to the electromagnetic solenoid 290, which is set to demagnetize the electromagnetic solenoid 290 when OFF and to excite when ON. Further, in the figure, “LDA” and “LDB” represent control signals to the drive motor 56, and when “LDA” is “L” and “LDB” is “H”, the drive motor 56 is It rotates in the normal direction (normal rotation) and the "LD
When "A" is "H" and "LDB" is "L", the drive motor 56 rotates in the opposite direction to the forward direction (reverse rotation), and the "LD"
When both “A” and “LDB” are “H”, the driving of the drive motor 56 is set to be stopped.

In FIG. 47, the loading operation of the disc cartridge 42, that is, the pair of left and right control cam plates 10 is performed.
The timing detection state at the time of moving 2, 104 from the position corresponding to the “cartridge unload position” to the position corresponding to the “cartridge load position” (P3) is shown.

That is, this magneto-optical disk cartridge 4
During the loading operation of No. 2, the pair of left and right control cam plates 102 and 104 are in the “cartridge unload position”.
Corresponding to the first and second detection sensors 32
When the third detection sensor 260 is turned off while both 6 and 328 are turned on, the disc cartridge 42 is manually inserted by the operator, that is, the disc cartridge 42 is in the “cartridge unload position”. "
The fact that it is brought to the “cartridge insertion detection position” slightly inserted from (P1) is detected. Upon detection of this cartridge insertion, the drive motor 56 is normally rotated. When the detection / drive gear 234 is driven to rotate in accordance with the normal rotation of the drive motor 56, first, the first detection rib 322 comes into the detection range of the first detection sensor 326, so that the first detection sensor 326 is turned off. In addition, thereafter, the second detection sensor 328 is turned off by the rotation of the detection / drive gear 234 and the second detection rib 324 entering the detection range of the second detection sensor 328. By turning off the second detection sensor 328, the disc cartridge 4
2 is automatically loaded by the automatic loading / unloading mechanism 52 to the "cartridge loading position" (P3), that is, the completion of cartridge loading is detected. With the completion detection of this cartridge loading,
The forward rotation operation of the drive motor 56 is stopped.

Specifically, in the cartridge unloading state in which the insertion of the disc cartridge 42 is not detected, the automatic loading / unloading mechanism 52, the timing detection mechanism 60, and the control cam plate drive mechanism 280 are shown in FIG.
It has been brought to the state shown in FIG. In this cartridge unloading state, the first to third detection sensors 32
6, 328 and 260 are both on. Here, when the disc cartridge 42 is manually inserted into the magneto-optical disc device 10 through the chassis opening 36 by the operator as shown in FIGS. At 40, the shutter plate 38 is simply pushed by the inserted magneto-optical disk 12 and pivots rearward against the biasing force of the torsion spring 228 to permit the insertion of the magneto-optical disk 12.

Then, the tip of the magneto-optical disk 12 passes through the "cartridge unload position" (P1) in which the tip of the magneto-optical disk 12 contacts the engaging piece 268a of the slide plate 268, and the engaging piece 26
8a is further pushed to drive the detection lever 25
0 is turned to turn off the third detection sensor 260. When the third detection sensor 260 is turned off, the fact that the disc cartridge 42 has been brought to the "cartridge insertion detection position", that is, the insertion of the disc cartridge 42 is detected. Then, based on this insertion detection, the control circuit activates the drive motor 56 of the automatic loading / unloading mechanism 52 and causes it to rotate in the normal direction, thereby starting the automatic loading operation of the disc cartridge 42.

Incidentally, this "cartridge unload position"
The internal structure of the magneto-optical disk device 10 in (P1) is shown in FIG. 54 for its plan view and in FIG. 59 for its left side view.
FIG. 60 shows the right side surface shape, and FIG. 69 shows the front surface shape. Further, at the "cartridge unload position" (P1), as shown in a front view state in FIG. 73, and at the "cartridge retraction complete position" (P2), as shown in a side view state in FIG. , The cartridge holder 1 at the respective positions P1 and P2.
00 is positioned at the "cartridge receiving position", and the magnetic head 14 is positioned at the "standby position".

The structure on the gear chassis 118 at the "cartridge insertion detection position" is as shown in FIG. That is, in FIG. 72, at the "cartridge insertion detection position", the positions of the cartridge holder 100 and the magnetic head 14 do not change from the "cartridge unload position" (P1), and the detection / drive gear 23
The rotation position of 4 does not change, and the pull-in link 266 is simply used.
Is rotated clockwise around the pivot pin 252,
The state in which the detection lever 250 is rotated clockwise and the third detection sensor 260 is turned off is shown.

Then, the magneto-optical disk cartridge 42
Is completely drawn into the cartridge holder 100,
Even after being brought to the "cartridge retracting completion position" (P2), the drive motor 56 is still driven and the detection / drive gear 234 is continuously driven to rotate.
Due to the cam shape of the drive cam groove 278 in the slide plate drive mechanism 264 described above, the drive pin 276 is no longer rotationally driven, and as a result, the drive drive of the slide plate 268 is stopped and the retraction operation of the disc cartridge 42 is stopped. On the other hand, the rotation of the detection / drive gear 234 by the drive of the drive motor 56 causes the gear arm 310 to which the lock arm 312 that locks the drive pin 298 is attached to rotate clockwise to attach the drive pin 298. The link arm 284 is likewise rotated clockwise, so that the link arm 284 is
Left and right control cam plates 1 whose left and right ends are locked respectively
02 and 104 are driven to move in opposite directions. The drive of the drive motor 56 is once stopped when the cartridge holder 100 is lowered to the “cartridge load position” (P3) and when the second detection sensor 328 is turned off. In this way, the cartridge holder 100 is held at the "cartridge loading position".

The internal structure of the magneto-optical disk device 10 at the above-mentioned "cartridge pull-in completion position" (P2) is shown in FIG. 55 for its planar shape, FIG. 61 for its left side surface shape, and FIG. It is designed to show each shape. The front shape at the "cartridge pull-in completion position" (P2) is the same as the "cartridge unload position" (P1) shown in FIG. Further, the internal structure of the magneto-optical disk device 10 at the "cartridge load position" (P3) is shown in FIG. 56 showing its plan view, FIG. 63 showing its left side view, FIG. 64 showing its right side view, and FIG. The front shapes are shown at 70, respectively.

When the cartridge holder 100 is brought to the "cartridge loading position" (P3), as shown in FIG. 74 in a front view and in FIG. 77 in a side view, the magnetic head 14 is shown. Is brought to the position immediately before the "intermediate position" (essentially the "intermediate position"). Then, after being brought to the "cartridge loading position" (P3), the spindle motor 44 is activated as described above, and the magneto-optical disc 12 in the disc cartridge 42 at the "cartridge loading position" (P3). Is rotated, and the optical code signal written in the control track on the inner peripheral side of this is read and operated.

On the other hand, in FIG. 48, during the loading operation of the magnetic head 14, that is, the pair of left and right control cam plates 102,
The timing detection state when moving 104 from the position corresponding to the "cartridge load position" (P3) to the position corresponding to the "magnetic head load position" of the magnetic head 14 is shown.

That is, during the loading operation of the magnetic head 14, when the magnetic head loading is instructed from the control circuit, the electromagnetic solenoid 290 is excited and the solenoid arm 300 is energized by suction and the drive motor 56 is activated. Drive forward again. This drive motor 56
The first detection sensor 326 is turned on when the first detection rib 322 comes out of the detection range of the first detection sensor 326 in accordance with the normal drive of the first detection sensor 32.
By the ON operation of 6, the automatic load / unload mechanism 52 up to the magnetic head 14 "magnetic head load position" (P4)
Thus, it is detected that the magnetic head has been automatically loaded, that is, the completion of the magnetic head loading. When the completion of the magnetic head loading is detected, the normal rotation operation of the drive motor 56 is stopped. Here, before the first detection sensor 326 is turned on, the third detection sensor 260 has the detection lever 25
When the driven pin 262 of 0 is pushed by the link arm 284, the detection lever 250 rotates clockwise, and the third detection sensor 260 is turned on by moving out of the detection range of the third detection sensor 260. .

When the first detection sensor 326 is turned on, the "magnetic head load position" (P
Before the position detection of 4) is performed, the slit 32 described above is used.
2a turns on for about 20 msec (ie 1
The second ON state) occurs. The first ON state of the first detection sensor 326 is not used in the timing detection operation of the loading operation of the magnetic head 14. Therefore, in this embodiment, the forward rotation operation of the drive motor 56 is set to be stopped when the first detection sensor 326 is turned on for the second time.

More specifically, in this magnetic head loading operation, the gear motor 310 to which the lock arm 312 that locks the drive pin 298 is attached is further rotated in the clockwise direction by driving the drive motor 56 again in the forward direction. As a result, the link arm 284 to which the drive pin 298 is attached is further rotationally driven in the clockwise direction as a result, and as a result, the pair of left and right control cam plates 102 and 104 in which the left and right ends of the link arm 284 are locked respectively, It will be further moved and driven in the opposite directions. In this way, the pair of left and right control cam plates 102, 104 are further moved and driven from the position defining the "cartridge loading position" (P3), so that the magnetic head 14 passes through the "intermediate position",
Further, it is lowered toward the "magnetic head load position" (P4). Immediately before the magnetic head 14 is brought to the "magnetic head load position" (P4), the drive pin 298 is locked by the locking portion 300b of the solenoid arm 300, and the other end of the lock arm 312 is locked. The lock is released by the portion 312c coming into contact with the shaft support pin 302 and rotating counterclockwise. Then, when the magnetic head 14 is brought to the “magnetic head load position” (P4), as described above, the first detection sensor 326 is turned on, so that the drive of the drive motor 56 is stopped. The magnetic head 14 is "magnetic head load position" (P
4). In this way, the loading operation of the magnetic head 14 is completed.

The above-mentioned "magnetic head load position" (P
The internal structure of the magneto-optical disk device 10 in 4) is shown in FIG. 57 for its front shape, FIG. 65 for its left side surface shape, FIG. 66 for its right side surface shape, and FIG. 75 for its front surface shape. It is done like this. In addition, the magnetic head 14
78 in a state where it is brought to this “magnetic head load position” (P4), in front view in FIG.
The magnetic head 14 is positioned directly above the magneto-optical disk 12, as shown in side view in FIG.

Further, in FIG. 49, during the unloading operation of the magnetic head 14, that is, the pair of left and right control cam plates 10 is shown.
The timing detection state is shown when moving 2, 104 from the position corresponding to the "magnetic head load position" (P4) to the position corresponding to the "cartridge load position".

That is, during the unloading operation of the magnetic head 14, when the magnetic head unload is instructed from the control circuit, the drive motor 56 is reversely driven,
The magnetic head unload operation is started. With the reverse rotation of the drive motor 56, the detection / drive gear 234 is rotationally driven (reverse rotation) in the direction opposite to the loading operation. With the reverse rotation of the detection / drive gear 234, the link arm 284 rotates counterclockwise. By this rotation, the detection lever 250 rotates counterclockwise to enter the detection range of the third detection sensor 260, and first, the third detection sensor 260 is turned off. After this, this detection and drive gear 2
When the reverse rotation of 34 advances, the first detection rib 322 moves to the first position.
Enters the detection range of the detection sensor 326, and turns off the first detection sensor 326.

When the reverse rotation of the detection / drive gear 234 further proceeds, the slit 322a of the first detection rib 322 is formed.
Are supplied to the first detection sensor 326, and the first detection sensor 326 is turned on for about 20 msec (that is, the first turn-on). When the first detection sensor 326 is turned on for the first time, the electromagnetic solenoid 290 is demagnetized. As a result, the electromagnetic attraction force on the solenoid arm 300 disappears. As a result, the locking portion 300 of the solenoid arm 300
The locked state of the drive pin 298 by b is released, and the link arm 284 to which the drive pin 298 is attached can be further rotated counterclockwise. In this way, the pair of left and right control cam plates 102 and 104 engaged with the link arm 284 which is rotated counterclockwise at both ends is moved and driven to the position corresponding to the "cartridge loading position".

Then, by the reverse rotation of the detection / drive gear 234, the second detection rib 324 is moved to the second detection sensor 32.
The second detection sensor 328 is turned on by exiting from the detection range of No. 8. When the second detection sensor 328 is turned on, the magnetic head 14 is at least in the “intermediate position”.
It is detected that the drive motor 56 has been unloaded, and the reverse rotation of the drive motor 56 is stopped by this magnetic head unload detection. In this way, the unloading operation of the magnetic head 14 is completed.

Further, in FIG. 50, during the unloading operation of the disc cartridge 42, that is, the pair of left and right control cam plates 102 and 104 are set to the "cartridge loading position".
The timing detection state when moving from the position corresponding to (P3) to the position corresponding to the "cartridge unload position" (P1) is shown.

That is, this magneto-optical disk cartridge 4
In the unloading operation of No. 2, when the cartridge unload is instructed from the control circuit, the drive motor 56 is reversely driven to start the cartridge unloading operation. With the reverse rotation of the drive motor 56, the cartridge holder 100 is moved to the “cartridge load position” (P
3) to the “cartridge receiving position”, and the cartridge holder 100 is moved to the “cartridge receiving position”.
When the cartridge holder 100 is raised, the raising operation of the cartridge holder 100 is stopped, and the slide plate drive mechanism 264 is driven from the cartridge holder 100 in the direction opposite to the loading direction to move the disc cartridge 42 to the “cartridge pull-in completion position”. Move to pull out from (P2) to "Cartridge unload position". And the first
The first detection sensor 326 is turned on when the detection rib 322 of (3) comes out of the detection range of the first detection sensor 326. When the first detection sensor 326 is turned on, it is detected that the disc cartridge 42 has been returned to the "cartridge unload position" (P1), that is, the completion of the cartridge unload operation. When the completion of the cartridge unloading is detected, the reverse rotation of the drive motor 56 is stopped. In this way, the unloading operation of the disc cartridge 42 is completed.

Before the first detection sensor 326 turns on, the detected piece 250a of the detection lever 250 comes out of the detection range of the third detection sensor 260, and the third detection sensor 260 turns on. There is. However, in this cartridge unload operation, the on timing of the third detection sensor 260 is not used at all.

Here, at the position (P5) during the unloading of the disk cartridge 42 from the "cartridge pull-in completion position" (P2) to the "cartridge unload position" (P1), the inside of the magneto-optical disk device 10 is The configuration is shown in FIG.
FIG. 68 shows its left side surface shape, and FIG. 68 shows its right side surface shape.

Further, in FIG. 51, during the forced unloading operation of the magnetic head 14 by the urging force of the return spring 318, that is, the pair of left and right control cam plates 102 and 104 is not the driving force of the drive motor 56 but the return spring. From the position corresponding to the "magnetic head load position" (P4) using the urging force of 318, the "cartridge load position" (P3)
The timing detection state when forcibly moving to the position corresponding to is shown.

That is, during the forced unloading operation by the spring force of the magnetic head 14, the power supply is cut off (power is cut off) due to a power failure or the like while the magnetic head load is instructed from the control circuit. Then, the power supply to the electromagnetic solenoid 290 of the above-described forced return mechanism 288 is cut off, and the electromagnetic solenoid 290 is automatically demagnetized. With the demagnetization of the electromagnetic solenoid 290, the electromagnetic attraction force on the solenoid arm 300 disappears, and the locked state of the drive pin 298 by the solenoid arm 300 is released. As a result, from the state shown in FIG. 71, the drive pin 298 causes the engagement of the solenoid arm 300 by the urging force of the return spring 318 that urges the eject arm 304 to which the eject pin 320 is attached to rotate counterclockwise. The solenoid 300 is retracted from the locking position by pushing back the stopper 300b. In this way
The link arm 284 to which the drive pin 298 is attached rotates in the counterclockwise direction (that is, return rotation) by the urging force of the return spring 318. Along with the counterclockwise rotation of the link arm 284, the pair of left and right control cam plates 102 and 104 are "magnetic head load position" (P4).
Is forcedly moved and driven by the urging force of the return spring 318 from the position corresponding to (1) to the position corresponding to the "intermediate position".

The return rotation of the link arm 284 based on the urging force of the return spring 318 is stopped by the eject pin 320 coming into contact with the rear end of the third guide groove 296 into which the eject pin 320 is fitted. Further, when the return rotation of the link arm 284 is stopped, the drive pin 298 attached to the link arm 284 is set to be locked by the tip of the lock arm 312.

Here, such return rotation of the link arm 284 does not change the rotation position of the detection / drive gear 234. Therefore, when the magnetic head 14 is forcibly driven to rise from the "magnetic head load position" (P4) to the "intermediate position",
The detection states of the second detection sensors 326 and 328 do not change. On the other hand, with respect to the third detection sensor 260, when the link arm 284 rotates counterclockwise, the detection lever 250 rotates counterclockwise and enters the detection range of the third detection sensor 260. Detection sensor 2 of 3
60 will be turned off.

In this way, even if the power supply is cut off due to a power failure or the like, the power supply cutoff
The magnetic head 14 is forcibly returned from the “magnetic head load position” to the “intermediate position” by using the biasing force of the return spring 318. As a result, the risk of damage to the magnetic head 14 can be reliably avoided as described above.

In this way, the magnetic head 14 moves the return spring 3 from the "magnetic head load position" to the "intermediate position".
The configuration on the gear chassis 118 in the state of being forcibly restored using the biasing force of 18 is as shown in FIG.

52. Here, in FIG. 52, the return spring 318 shown in FIG. The timing detection state when the drive gear 234 is moved back to the position corresponding to the “intermediate position” is shown.

That is, the control circuit restarts the control operation with the restart of the supply of the electric power, whereby the detection / drive gear 23
Return operation 4 is started. Here, when the control operation is restarted, the control circuit causes the first detection sensor 326 to operate.
Is on, and the second and third detection sensors 328, 2 are
Based on the state in which both 60 are off, it is determined that the control operation is resumed after the forced return mechanism 288 is activated, not the normal control start state. In this way, when restarting the control after the return operation, the control circuit first detects,
The rotational position of the drive gear 234 and the pair of left and right control cam plates 1
Since the moving positions of 02 and 104 are out of the normal positional relationship, in order to eliminate such an abnormal state, the detection / drive gear 234 is moved to the rotation position corresponding to the "intermediate position" of the magnetic head 14. Executes return control for return rotation.

More specifically, as shown in FIG. 52, when the control circuit instructs the return rotation of the detection / drive gear 234,
The drive motor 56 is driven in reverse. With the reverse rotation of the drive motor 56, the detection / drive gear 234 is rotationally driven (reverse rotation) in the direction opposite to the loading operation. With the reverse rotation of the detection / drive gear 234, the gear arm 3
10 rotates only in the counterclockwise direction, and the link arm 28
4 does not rotate. When the reverse rotation of the detection / drive gear 234 progresses, the first detection rib 322 moves to the first detection sensor 3
In the detection range of 26, the first detection sensor 326 is turned off.

Further, when the reverse rotation of the detection / drive gear 234 progresses, the slit 322a of the first detection rib 322 is formed.
Is supplied to the first detection sensor 326, and turns on the first detection sensor 326 for about 20 msec. Then, the detection / drive gear 234 is further rotated in the reverse direction, so that the second
The detection rib 324 of (2) comes out of the detection range of the second detection sensor 328, and the second detection sensor 328 is turned off. When the second detection sensor 328 is turned off, detection /
It is detected that the rotation position of the drive gear 234 has been rotated to a position corresponding to the “intermediate position” of the magnetic head 14, and this rotation return detection stops the reverse rotation of the drive motor 56. In this way, the rotational position of the detection / drive gear 234 and the moving positions of the pair of left and right control cam plates 102 and 104 are restored to the normal positional relationship.

53, the reloading operation of the magnetic head 14 to the "magnetic head load position" (P4), that is, the rotation position of the detection / drive gear 234 shown in FIG. The pair of left and right control cam plates 102, 104 are moved back to the positions corresponding to the "magnetic head load position" (P4) from the return state to the normal positional relationship with the moving positions of the control cam plates 102, 104. The timing detection state at this time is shown.

That is, during the reloading operation of the magnetic head 14, when the magnetic circuit reloading is instructed from the control circuit, the electromagnetic solenoid 290 is excited and the drive motor 56 is again driven in the normal direction. With the forward rotation of the drive motor 56, first, the second detection rib 324 enters the detection range of the second detection sensor 328, and the second detection sensor 328 is turned off. After this,
When the first detection rib 322 comes out of the detection range of the first detection sensor 326, the first detection sensor 326 is turned on. Position ”(P
Up to 4), the automatic loading / unloading mechanism 52 detects the automatic loading, that is, the completion of the magnetic head reloading is detected. When the completion of the magnetic head reloading is detected, the normal rotation operation of the drive motor 56 is stopped.

Here, as in the case of the magnetic head loading operation described above, before the first detection sensor 326 is turned on, the third detection sensor 260 detects the detection lever 2
When the follower pin 262 of 50 is pushed by the link arm 284, the detection lever 250 rotates clockwise, and when it comes out of the detection range of the third detection sensor 260, the third detection sensor 260 turns on. ing.

When the first detection sensor 326 is turned on, the "magnetic head load position" of the magnetic head 14 is reached.
Before the position detection of (P4) is performed, the ON state of about 20 msec occurs due to the slit 322a described above.
The ON state of the first detection sensor 326 for about 20 msec is not used in the timing detection operation of the reloading operation of the magnetic head 14. Therefore, in this embodiment, the forward rotation operation of the drive motor 56 is stopped when the ON state continues even after at least about 20 msec has passed since the first detection sensor 326 was turned ON. Is set to.

As described in detail above, the timing detection mechanism 60 in this embodiment includes the detection / drive gear 234, the detection lever 250, the first detection sensor 326, the second detection sensor 328, and the third detection sensor. The drive / load operation of the disk cartridge 42 and the load / unload operation of the magnetic head 14 are accurately controlled by only providing the configuration including the 260, the first detection rib 322, and the second detection rib 324. You will be able to do it.

Next, a horizontal positioning mechanism for accurately defining the horizontal position of the "magnetic head loading position" of the magnetic head mounting base 62 (6) of the characteristic construction of this embodiment at a constant position at all times. 66 will be described with reference to FIGS. 80 to 83.

First, as shown in FIG. 80, the pair of left and right rear position regulating pins 24a, 24b constituting the vertical positioning mechanism 64 described above have circular positioning recesses 332a, 332b on the upper surface, respectively. Has been formed. On the other hand, the horizontal positioning mechanism 66 is provided on the lower surface of the rear end edge of the magnetic head mounting base 62 from above from the concave portions 332a, 33b of the rear position regulating pins 24a, 24b.
A pair of left and right rear positioning pins 334 fitted in 2b
a and 334b are integrally formed so as to project downward. Here, each rear positioning pin 334
The a and 334b are formed of taper pins whose diameters are gradually reduced as they go downward. In this way, the magnetic head mounting base 62 is brought to the “magnetic head loading position”, and the rear positioning pins 334a and 334b are fitted into the recesses 332a and 332b of the corresponding rear position regulating pins 24a and 24b. The horizontal position of the magnetic head mounting base 62 is roughly defined.

As shown in FIG. 81, the rear positioning pin 33 is located on the left side when viewed from the insertion direction X (since FIG. 81 is a bottom view, it is located on the right side in the state shown).
4a and the recess 3 of the rear position regulating pin 24a corresponding thereto
The fitting state with 32a is set so as to be in a loose fitting state, that is, to be fitted with a predetermined play. On the other hand, the rear positioning pin 334b located on the right side when viewed from the insertion direction X (as described above, since FIG. 81 is a bottom view, it is located on the left side in the illustrated state) and the rear position regulation corresponding thereto The fitting state of the pin 24b with the recessed portion 332b is set so that the pin 24b is fitted tightly, that is, the pin 24b is fitted in a state where there is no predetermined play. In this manner, in this embodiment, the left side portion (right side portion in the illustrated state) of the magnetic head mounting base 62 is pressed and driven along a certain direction, so that the magnetic head mounting base 62 is horizontally moved. The directional position is always defined as a fixed position.

Therefore, this horizontal positioning mechanism 66
When the control cam plates 102 and 104 are driven to move to a position corresponding to the “magnetic head loading position”, the left side portion (right side portion in the illustrated state) of the magnetic head mounting base 62 is inserted in the insertion direction X. Is configured to be pressed and biased along a predetermined direction inclining. That is, as shown in FIG. 82 and FIG. 83, the horizontal positioning mechanism 66 includes a preload link arm 338 rotatably supported by the left side portion 26b of the loading chassis 26 via a shaft support pin 336. , A preload slide plate 340 slidably attached to the lower surface of the magnetic head attachment base 62 along the insertion direction X so as to be pushed by the preload link arm 338, and a rear position where the rear positioning pin 334a is fitted in the recess 332a. A preload arm 344 rotatably supported by a magnetic head mounting base 62 via a shaft support pin 342 so as to be able to contact the regulation pin 24a, and the preload arm 344 and the preload slide plate 340. And a preload spring 346. More specifically, the preload link arm 338 described above is formed in a substantially L shape in a side view, and the loading chassis 26 is provided via a shaft support pin 336 that extends horizontally at the bent portion.

It is rotatably supported by the left side portion 26b. Further, at the tip (rear end) of the rear extension piece 338a extending rearward of the preload link arm 338,
A cam pin 348 that fits into the pressing cam groove 102d formed on the left control cam plate 102 is planted, and the downward extension piece 338b of the preload link arm 338 is provided.
A pressing pin 350, which is set to be able to press the rear end of the preload slide plate 340, is attached to the front end (lower end) of the above in a state of horizontally extending to the inner side surface thereof. In this way
The left control cam plate 102 is moved and driven to a position corresponding to the “magnetic head load position”, whereby the cam pin 348 is engaged with the pressing cam groove 102d to form the cam shape of the pressing cam groove 102d. Accordingly, the preload link arm 338 is rotated clockwise from the position shown by the solid line to the position shown by the chain double-dashed line in FIG. 83.
When the preload slide plate 340 is inserted in the insertion direction X, the pressing pin 350 attached to the preload link arm 338 is rotated to the position indicated by the chain double-dashed line.
It will be pushed in the opposite direction. In addition, on the lower surface of the front end of the preload slide plate 340, a locking portion 340a for locking the front end portion of the preload spring 346 described above is formed in a standing state.

On the other hand, the above-mentioned preload arm 344 is formed in a substantially L shape in a plan view, and the one piece 3 along the insertion direction X.
An abutting portion 352 that can abut the corresponding rear position regulating pin 24a in a state where the magnetic head mounting base 62 is brought to the "magnetic head loading position" on the outside of the 44a.
Is attached. The abutting portion 352 does not drive the preloading link arm 338 by pushing the preloading slide plate 340, and therefore, in a state where the preloading spring 346 is not pulled and driven, the rear position regulating pin 2 is exactly.
It is positioned at a position slightly separated from the outer circumference of 4a. On the other piece 344b extending outward along the direction orthogonal to the inserting direction X of the preload arm 344, a locking portion 344c for locking the rear end of the preload spring 346 is lowered. Has been formed.

Since the horizontal positioning mechanism 66 is constructed in this manner, the magnetic head actuator 62 drives the pair of left and right control cam plates 102, 104 to move.
At the time when it is lowered to the position corresponding to the “magnetic head load position”, the vertical positioning mechanism 64 described above accurately performs the vertical positioning, and the pair of left and right rear positioning pins 334a, 334b By fitting the rear position regulating pins 24a, 24b corresponding to the above into the respective concave portions 332a, 332b from above, the general positioning in the horizontal direction is performed.

From this state, the pair of left and right control cam plates 102, 104 are further moved and driven, whereby the cam pin 348 is moved according to the cam shape of the pressing cam groove 102d formed in the left control cam plate 102. As a result, the preload link arm 338 is rotated around the shaft support pin 336 in the clockwise direction in FIG. 83. By the rotation of the preload link arm 338, the pressing pin 350 attached to the preload link arm 338 engages with the rear end of the preload slide plate 340 and pushes the preload slide plate 340 in the direction opposite to the insertion direction X for driving. As the preload slide plate 340 is pushed in, the preload spring 346 is pulled, and as a result, the preload arm 344 is urged to rotate clockwise about the pivot pin 342. In this way, the contact portion 352 of the preload arm 344 comes into contact with the outer periphery of the rear position regulating pin 24a.

As a result, the circumferential portion of the rear position regulating pin 24a is sandwiched between the abutting portion 352 of the preload arm 344 and the rear positioning pin 344a, so that there is no gap between them. The magnetic head mounting base 62 has a rear positioning pin 334 so that the magnetic head mounting base 62 is pinched in the state.
Rotate around b. In this way, the magnetic head mounting base 62 is always brought to a constant horizontal position when the horizontal positioning mechanism 66 operates, and thus the horizontal positioning operation of the magnetic head mounting base 62 is performed. Will be achieved.

That is, in this embodiment, by providing the horizontal positioning mechanism 66 and the vertical positioning mechanism 64 described above, the magnetic head mounting base 62 is loaded in the "magnetic head loading position". Thus, the horizontal position and the vertical position are accurately positioned. As a result, the horizontal position and the vertical position of the magnetic head 14 mounted on the magnetic head mounting base 62 are also accurately defined, and more accurate information recording (overwriting) operation is achieved.

Next, (7) the magnetic head 14 having the characteristic structure of this embodiment is attached to the magnetic head mounting base 62.
Magnetic head carriage 68 slidably held on
The lock mechanism 70 for locking the lock lever at the outermost position in the "standby position" will be described with reference to FIGS. 78 and 79 and FIGS. 84 to 87.

First, as shown in FIGS. 78 and 79, with the magnetic head 14 loaded in the "magnetic head load position" (P4), the magnetic head 14 and the optical head 16 are
In a state where they are synchronized with each other, they are moved and driven between the outermost peripheral position (FIG. 78) and the innermost peripheral position (FIG. 79) of the magneto-optical disk 12 via linear motors 162 and 134, respectively. Here, the magnetic head carriage 68, which is attached to and supported by the lower surface of the magnetic head attachment base 62 so as to be movable in the radial direction of the magneto-optical disk 12 while the magnetic head 14 is attached, is moved to the maximum position at the "standby position". The locking mechanism 70 for locking the outer peripheral position is shown in FIG.
As shown in FIG. 4, the locking hook 354 is fixed to the outermost radial portion of the carriage arm 170 integrally attached to the magnetic head carriage 68 and is substantially L-shaped in a side view.
And the locking hook 354 provided on the inner surface of the rear cover 30 attached so as to close the rear surface of the loading chassis 26 and brought to the outermost peripheral position in the "standby position" as shown in FIG. And a lock lever 356 for locking the lock lever from the outermost peripheral position so that the lock lever 356 cannot move. The lock lever 356 is formed in a substantially L shape in a side view so that the locking hook 354 described above can be locked.

The lock lever 356 is shown in FIG.
6 and the mounting mechanism 358 shown in an enlarged scale in FIG. 87, the mounting mechanism 358 is mounted on the inner surface of the rear cover 30. That is,
The mounting mechanism 358 includes a mounting stay 360 fixed to the inner surface of the rear cover 30 and the mounting stay 3
A pair of left and right support pieces 362a, 362b bent so as to fall on both sides of the front end portion of 60, and both support pieces 362a, 3
A support shaft 364 is provided so as to be extended between 62b and extend in a horizontal direction orthogonal to the insertion direction X. A lock lever 356 is rotatably attached to the support shaft 364.

A torsion spring 366 is wound around the support shaft 364.
One end of the lock lever 356 is locked to the mounting stay 360, and the other end thereof is locked to the lock lever 356 to urge the lock lever 356 to rotate clockwise in FIG. 87. By the biasing force of the torsion spring 366, the lock lever 356 is elastically held in the posture shown in FIG. 87 in a state where the tip of the lock lever 356 abuts the tip of the mounting stay 360 from below.

Since the lock mechanism 70 is constructed as described above, when the unload instruction for the disk cartridge 42 is issued in the magneto-optical disk device 10, the unloading operation via the above-mentioned automatic loading / unloading mechanism 52 is performed. As a result, the magnetic head 14 is unloaded to the "intermediate position", and this unloading operation is temporarily stopped. In this state, the linear motor 162 is activated to drive the magnetic head carriage 68 to move outward in the radial direction of the magneto-optical disk 12. Then, the magnetic head carriage 68 is moved outward in the radial direction by the operation of the linear motor 162, and the unloading operation is started again in the state of being pressed to the mechanical stop position. That is, while the magnetic head mounting base 62 is moved from the "intermediate position" to the "standby position", the magnetic head carriage 62 is securely held at the outermost radial position in the radial direction.

In this way, with the magnetic head mounting base 62 unloaded to the "standby position", the locking hook 354 fixed to the carriage arm 170 integrally mounted to the magnetic head carriage 68, The lock lever 356 is engaged from below, and the magneto-optical disk 1
The movement of 2 inward in the radial direction is locked. In this locked state, even when the disc cartridge 42 is taken out of the magneto-optical disc device 10 and the power is turned off, the magnetic head mounting base 62 has the cam pins 178a, 178b, 178c, 178d and the cam grooves 102b ₁ corresponding to the respective cam pins 178a, 178b, 178c, 178d. 102b ₂ , 104b
₁ ; Mechanically "standby position" by engaging with 104b _2.
And the magnetic head carriage 68 is locked at the outermost peripheral position so that it cannot move in the inner peripheral direction. Therefore, the magnetic head carriage 68 is locked in a state in which its movement is prohibited at the outermost peripheral position in the "standby position". As a result, even if the disk cartridge 42 is taken out from the magneto-optical disk device 10 and is carried and a moving force acts on the magnetic head carriage 68, the magnetic head carriage 68 is at the outermost position in the "standby position". Since it is locked in a position where its movement is prohibited, there is no possibility of movement due to this carrying, and thus it is possible to surely prevent the magnetic head 14 from being subjected to impact force due to careless movement. Will be

Next, (8) the laser optical system 72 for guiding the laser light to the optical head 16 having the characteristic construction of this embodiment.
The mounting structure of the beam splitter 74 in FIG. 7 will be described with reference to FIGS. 7 and 88 and 89 described above.

First, as shown in FIG. 7, an optical system mounting base 24c on which the laser optical system 72 is mounted on the mounting reference plane Z is integrally connected to the rear portion of the optical head mounting base 24. . As shown in FIG. 88, the laser optical system 72 includes an optical system housing 368 fixed to the optical system mounting base 24c at the mounting reference plane Z. A semiconductor laser serving as a laser light source 370 is attached to one side of the optical system housing 368, and a collimator lens 372 is located inside the optical system housing 368 while being positioned on the optical path of the semiconductor laser 370. It is installed.

In front of the collimator lens 372, the laser beam transmitted through the collimator lens 372 is directed to the optical head 16 and a light beam having an optical axis L ₁ and a photodiode 374 for an auto power controller (APC) are provided. thereby split into a light beam having an optical axis L ₂ toward the laser beam returning from the optical head 16 (i.e.,
The laser beam containing the recording information reflected and returned by the recording surface of the magneto-optical disk 12 and the laser beam containing the servo information reflected and returned by the tracking for servo) are passed therethrough to detect the servo / data. A beam splitter 74 for reflecting the light toward the photo sensor 376 is provided. The beam splitter 74 and the photo sensor 3
A condenser lens 3 for condensing the laser light returned from the optical head 16 on the photo sensor 376.
78 is disposed on the optical axis L ₃ of the reflection optical path, and between the condenser lens 378 and the photo sensor 376, the laser light returned from the optical head 16 is converted into P wave and S wave. A polarization beam splitter 380 for separating is provided.

Here, the beam splitter 74 described above is used.
Is formed by joining two triangular prisms 382 and 384, and as shown in FIG. 89, the first triangular prism 3
Reference numeral 82 denotes surfaces 382a and 382b orthogonal to each other, and an inclined surface 382c corresponding to the hypotenuse of a right triangle, and the second triangular prism 384 has the surface 38 orthogonal to each other.
4a, 384b and a slope 384c corresponding to the hypotenuse of a right triangle. Then, the second triangular prism 38 is formed on the slope 382c of the first triangular prism 382.
The other orthogonal surface 384b of No. 4 is joined, and this joined surface 382
A half mirror film is provided between c and 384b.

Further, one orthogonal surface 382a of the first triangular prism 382 is defined as the incident surface of the laser light from the semiconductor laser 370, and the other orthogonal surface 382b is reflected by the half mirror film and the optical head 16 is provided. It is defined as the emitting surface of the laser beam toward the. On the other hand, the one orthogonal surface 384a of the second triangular prism 384 has the optical head 16
Is defined as the reflection surface of the laser light returned from the laser beam, and the slope 384c thereof is defined as the emission surface of the laser light toward the photosensor 376 and the laser light that is separated by the half mirror film and toward the photodiode 374 for APC. Has been done.

In the first and second triangular prisms 382 and 384 whose respective surfaces are thus defined, the characteristic point of this embodiment is that the first triangular prism 382.
The angle formed by the one orthogonal surface 382a and the inclined surface 382c is set to be 44 degrees, and the other orthogonal surface 384b and the inclined surface 3 in the second triangular prism 384 are set.
The angle formed with 84c is set to 44 degrees.

[0219] Then, the first and the second configured as described above.
The beam splitter 74 formed by joining the triangular prisms 382 and 384 of the first triangular prism 382 is defined as the incident surface of the laser light from the semiconductor laser 370, as shown in FIG. One orthogonal plane 3
The incident optical axis L ₀ to 82a is 1.5 in the clockwise direction with respect to the normal line N ₁ to the _one orthogonal surface 382a at the incident position.
The exit optical axis L ₁ from the other orthogonal surface 382b of the first triangular prism 382 is tilted by 1 degree in a clockwise direction with respect to the normal line N ₂ of the other orthogonal surface 382b at the exit position. The emission optical axis L ₂ of the laser light directed toward the photodiode 374 for APC on the slope 384c of the second triangular prism 384 is inclined by 1.51 degrees, and a normal line N ₃ to the slope 384c at the emission position. On the other hand, the emission optical axis L ₃ of the laser light directed toward the photosensor 376 of the slope 384c of the second triangular prism 384 is inclined at the slope 38 at the emission position so as to be inclined clockwise by 1.51 degrees.
The optical system housing 3 is set in such a manner that it is tilted by 1.51 degrees clockwise with respect to the normal line N ₄ to 4c.
It is attached and fixed to 68.

Here, the respective surfaces 382a, 382b, 3
84c is the tilt angle of the normals N ₁ , N ₂ , N ₃ (N ₄ ) with respect to the corresponding optical axes L ₀ , L ₁ , L ₂ (L ₃ ).
51 degrees is the first and second triangular prisms 382,
It is set to be equal to the refractive index of the optical glass (for example, BK7) forming 384.

In this way, the respective surfaces 382a, 382b,
Since the beam splitter 74 is attached to the optical system housing 368 with the attachment angle of 384c being regulated, for example, the laser light (L ₀ ) incident from one orthogonal surface 382a is incident on this incident surface (382a). The first triangular prism 38 is refracted and inclined by 1 degree with respect to the normal line N ₁ orthogonal to the one orthogonal surface 382 a.
Step inside 2. As a result, the first triangular prism 382
The laser light (L ₀ ′) that has entered the inside enters the half mirror film at exactly 45 degrees. In this way, the laser light (L ₁ ′) reflected by the half mirror film is inclined by 1 degree with respect to the normal line N ₂ which is orthogonal to the other orthogonal surface 382b. Then, this laser light (L ₁ ′)
Is refracted at the exit surface (382b) and is inclined by 1.51 degrees with respect to the normal line N ₂ orthogonal to the other orthogonal surface 382, and the laser light (L
₁ ) is emitted from the first triangular prism 382.

As a result, by using the beam splitter 74 attached in this way, the incident angle of the laser beam with respect to the half mirror film becomes 45 degrees as in the conventional case, so that a new design for this half mirror film is unnecessary. Becomes Also, the optical axes L ₀ , L ₁ , corresponding to the normals N ₁ , N ₂ , N ₃ , N ₄ of the respective surfaces 382a, 382b, 384c.
Since L ₂ and L ₃ are respectively inclined by 1.51 degrees, for example, one orthogonal surface 382 of the first triangular prism 382 is used.
In the laser beam (L ₀ ) that is about to enter from a, even if there is a component reflected by the one orthogonal surface 382a, this reflected component returns to the semiconductor laser 370 through the incident optical path thereof. There is no problem in the semiconductor laser 370. Further, even if there is a component of the laser light (L ₁ ′) reflected by the half mirror film that is reflected by the other orthogonal surface 382b of the first triangular prism 382, this reflected component causes the incident optical path of the laser light (L ₁ ′). It does not return to the semiconductor laser 370 again. Further, there is no possibility that the light will pass through the half mirror film and will be reflected by one of the orthogonal surfaces 384a to reach the photosensor 376 for servo / data detection, causing a problem in read information.

As described above, according to this embodiment, it is possible to easily achieve the countermeasure against the stray light without damaging the optical characteristics. Further, if the mounting angle of the beam splitter 384 is tilted by 1.51 with respect to the incident optical axis L ₀ and is accurately positioned using a mounting jig (not shown), the remaining Since the optical axis L ₂ is orthogonal to the mounting reference plane Z, and the optical axes L ₃ and L ₄ are parallel to the mounting reference plane Z, the condenser lens inside the optical system housing 368. 378 and polarization beam splitter 38
The mounting angle of 0 can be accurately defined on the basis of the mounting surface reference Z without using a special mounting jig, and the mounting angle of the optical head 16 described above is also the mounting reference surface Z. Can be accurately specified, and in this way, the mounting states such as the mounting angles of other optical elements can be easily and extremely accurately defined.

Finally, as a part of (9) the initial processing at the time of startup of the magneto-optical disk device 10 having the characteristic configuration of this embodiment, the magnetic head 14 and the optical head 16 are located at the outermost peripheral position of the magneto-optical disk 12. The control procedure for synchronizing the above and the above will be described in the control procedure in the control circuit described above.

First, with reference to FIG. 90, the control procedure of the entire operation in this control circuit will be briefly described.

That is, waiting for the power to be turned on (S10
If NO in step S10, it is detected that the power is turned on (YES in step S10).
S), first to third detection sensors 326, 328, 26
The on / off state of 0 is checked (S12). In this sensor check, the first to third detection sensors 32
When all the outputs of 6 and 328 are on, the disc cartridge 42 is in the “cartridge unload position”.
In the state of (P1), it is determined that the power is turned on, and thereafter, the insertion of the disk cartridge 42 is waited for. That is, it waits until the third detection sensor 260 is turned off (S14). When the third detection sensor 260 is turned off, it is determined that the disc cartridge 42 has been manually inserted by the operator up to the "cartridge insertion detection position". Upon activation, the loading process of the disc cartridge 42 is started (S16). This loading process will be described later in detail with reference to FIGS. 91 and 92 as a subroutine.

Then, when the loading process is completed,
Data writing / reading processing is executed for the magneto-optical disk 12 in the loaded disk cartridge 42 (S18). Here, as will be apparent from the loading process described later, the loaded magneto-optical disk 1
Only when 2 is a single-sided type and is not write-protected, the magnetic head 14 is lowered to the “magnetic head load position” (P4), and it is possible to record information (overwrite). Has become. Further, in the case of other types, that is, in the case of the double-sided type or in the case of being write-protected, the information recording (overwriting) operation is unnecessary, so that the magnetic head 14 is " It is kept in the intermediate position.

After that, the eject switch 3 shown in FIG.
When the switch 86 is turned on (S20), the eject switch 386 is turned on (YES in S20), the unloading process is executed (S22), and the automatic load / unload mechanism 52 is operated in the opposite direction from the loading. And unloads the loaded disk cartridge 42 to the "cartridge unload position" (P1), and at the same time, the magnetic head mounting base 62 at the "intermediate position" or the "magnetic head load position" (P4).
To the "standby position". This unloading process will be described later in detail with reference to FIG. 93 as a subroutine.

In this way, the disc cartridge 42 is unloaded to the "cartridge unloading position" (P1), thereby completing a series of control procedures.

On the other hand, in the above-described sensor check in step S12, when it is determined that the output of the first detection sensor 326 is on and the outputs of the second and third detection sensors 328 and 260 are both off. In the state where the magnetic head 14 is in the “magnetic head load position”, the power is cut off due to a power failure or the like, and the electromagnetic solenoid 290
Only the magnetic head mounting base 62 is actuated by the operation of the forced return mechanism 288 utilizing the demagnetization of the return spring 3
Since it is determined that the power is turned on from the case where the power is forcibly returned to the "intermediate position" by the urging force of 18, the state is set to the rotation position corresponding to the "magnetic head load position". The detection / driving gear 234 is returned to the rotational position corresponding to the "intermediate position" (S24), and subsequently the magnetic head 14 is subjected to the magnetic head reloading process to the "magnetic head loading position" (S26).
After this, the data write / read processing in step S18 described above is executed. After this, the subsequent control procedure is executed.

In the sensor check in step S12, the two states described above, that is, the first to third detection sensors 326, 328, 260 are all turned on, or the first detection is performed. When it is determined that the output of the sensor 326 is on and the outputs of the second and third detection sensors 328 and 260 are both off, the magnetic head is in a sensor output state other than the two states. 14 is out of the "magnetic head loading position" (P4), and is in the middle of loading or unloading of the disk cartridge 42 (that is, the disk cartridge 42 is in the "cartridge unload position" (P4)).
Since it is determined that the power is turned on from the case where the power is turned off at the position other than 1)), the disc cartridge 42 in the magneto-optical disc device 10 is once ejected. In step S22, the unloading process is performed, all control procedures are completed, and
It waits for the detection of the insertion of the next disk cartridge 42.

Next, referring to FIGS. 91 and 92, step S1 in the main routine shown in FIG. 90 described above.
The loading process of No. 6 will be described in detail as a subroutine.

First, when this loading process is called, the drive motor 56 is normally driven until the second detection sensor 328 is turned off (S16A, S16B, S16).
C). At this point, the disc cartridge 42 is drawn to the “cartridge pull-in completion position” (P2) in the cartridge holder 100, and then lowered from the “cartridge receiving position” to the “cartridge load position” (P3) of the cartridge holder 100. Accordingly, the magnetic head 14 is loaded to a position where information can be read by the optical head 16, while the magnetic head 14 is stopped while being lowered from the "standby position" to the "intermediate position". Then, it is determined whether or not the disk cartridge 42 loaded up to the "cartridge load position" (P3) is write-protected (S16D). If the disk cartridge 42 is write-protected, information writing is prohibited. Therefore, the flag FWP indicating that the writing of this information is prohibited is set to "1" (S16).
E), if write protection is not applied,
Since writing of information is permitted, "0" is reset to the flag FWP indicating that writing of this information is prohibited (S16F).

Thereafter, the spindle motor 44 is set to, for example, 3
The linear motor 134 for the optical head carriage 128 is activated (S16H) so that the optical head 16 is moved to the innermost position of the magneto-optical head 12 (S16H). Then, the PEP recorded at the innermost position of the magneto-optical disk 12 is read (S16I), and it is determined whether the information standard of the magneto-optical disk 12 is the ISO standard or the ECMA standard (S16).
J). If the magneto-optical disk 12 is determined to be ISO standard (YES in S16J), the rotation speed of the spindle motor 44 is increased to 4000 rpm (S16K), and it is determined to be ECMA standard. In (NO in S16J), the rotation speed of the spindle motor 44 is not changed and the rotation is continued while maintaining the rotation speed of 3000 rpm.

Then, it is judged whether or not the write protection is applied (S16L), and when it is judged that the write protection is applied, that is, FWP is set to "1" (YES in S16L). ), No information is written regardless of the information standard. Therefore, it is not necessary to lower the magnetic head 14 to the "magnetic head load position" (P4). Therefore, the control procedure is terminated at this point and the process returns to the original main routine.

On the other hand, when write protection is not applied, that is, when FWP is set to "0" (S
For 16 L, the linear motor 162 for the magnetic head carriage 68 is driven so as to move the magnetic head 14 to the outermost position of the magneto-optical disk 12 (S16).
M), subsequently, the linear motor 134 for the optical head carriage 128 is driven so that the optical head 16 is similarly moved to the outermost peripheral position of the magneto-optical disk 12 (S16).
N). The MFZ indicating whether the magneto-optical disk 12 is for one side or for both sides by the optical head 16 moved to the outermost position of the magneto-optical disk 12 in this way.
Is read (S16O). If it is determined by the read MFZ that the magneto-optical disk 12 is for both sides (YES in S16P), information cannot be written, so the magnetic head 14 is set to the “magnetic head load position”.
It is not necessary to lower it to (P4). Therefore, the control procedure is terminated at this point and the process returns to the original main routine.

If it is judged that the magneto-optical disk 12 is for one side (NO in S16P), it is possible to overwrite the information on the recording layer of the magneto-optical disk 12, so that the magnetic head 14 "Magnetic head load position" (P
The magnetic head loading operation toward 4) is started. That is, first, the electromagnetic solenoid 290 is excited (S1
6Q), the drive motor 56 until the first detection sensor 326 is turned on for 20 msec or more (that is, until it is turned on for the second time).
Are driven (S16R, S16S, S16T). Then, as a part of the initial process at the time of loading of the magneto-optical disk 10, the reflection plate 154 fixed on the outermost peripheral portion of the carriage arm 148 connected to the optical head carriage 128 at the outermost peripheral position of the magneto-optical disk 12. And the magnetic head 14 and the optical head 16 in the radial direction of the magneto-optical disk 12 via a pair of photocouplers 150 and 152 attached to the lower surface of the outermost peripheral portion of the carriage arm 170 connected to the magnetic head carriage 68. Are synchronized with each other (S16U). Thereby, thereafter, the magnetic head 14 and the optical head 16 are
They will move together in sync with each other.

In this embodiment, when the magnetic head 14 and the optical head 16 start synchronizing each other in this way, the carriage arms 170 and 148 are placed at the outermost positions of the magneto-optical disk 12. After moving in advance, this synchronization operation is started. That is, the magnetic head 14 is moved to the outermost peripheral position of the magneto-optical disk 12 in advance in step S16M described above, while the optical head 16 also moves to the outermost peripheral position of the magneto-optical disk 12 to read the MFZ. Has been made. As a result, it is not necessary to move the optical head 16 and the magnetic head 14 largely in the radial direction of the magneto-optical disk 12 when starting the above-described synchronization operation, and therefore, the operation period required for this synchronization operation. Is extremely short, and the operating time of the entire loading process can be shortened.

The optical head 16 uses the MF recorded in the outermost peripheral area of the magneto-optical disk 12 in step S16O.
In order to read Z, the optical head 16 uses the magneto-optical disk 1
2 is located at a position displaced inward in the radial direction from the outermost peripheral position. Therefore, as described above, at the time of reading / writing information, the linear motor 162 is drive-controlled so that the magnetic head 14 moves while being synchronized with the movement of the optical head 16, but this synchronization is performed. At the time of starting the operation, the linear motor 134 is set to be drive-controlled so that the position of the optical head 16 is synchronized with the magnetic head 14 which is previously brought to the outermost peripheral position.
That is, at the time of starting this synchronization, first, the linear motor 134 is activated to move the optical head 16 to the outermost radial position of the magneto-optical disk 12, and both are moved to the outermost radial position of the magneto-optical disk 12. With the position brought within the synchronization control range, activate the synchronization mechanism,
The magnetic head 14 and the optical head 16 are synchronized.

Here, even when the MFZ is read in step S16O described above, if the optical head 16 is within the synchronization control range described above, this optical head 16
On the other hand, the linear motor 162 can be driven and controlled so that the magnetic head 14 is synchronized.

In this way, the magnetic head 14 and the optical head 1
After synchronizing with each other, the loading process is terminated and the process returns to the original main routine.

Next, referring to FIG. 93, FIG.
The unloading process of step S22 in the main routine shown in 0 will be described in detail as a subroutine.

First, when this unloading process is called, the drive motor 56 is reversely driven until the second detection sensor 328 is turned on (S22A, S22B, S2).
2C, S22E). By the time the second detection sensor 328 is turned on (NO in S22B), the first detection sensor 326 causes the corresponding slit 322a of the first detection rib 322 to enter the detection range. When turned on (YES in S22C), the electromagnetic solenoid 290
Is demagnetized (S22D). In this way, when the reverse rotation of the drive motor 56 is stopped, the magnetic head 14 is unloaded from the "magnetic head load position" (P4) to the "intermediate position". After that, the drive of the spindle motor 44 is stopped (S22F), and the magnetic head 14 is stopped.
The linear motor 162 is driven so that C moves to the outermost position of the magneto-optical disk 12 (S22G).

Then, it waits until the rotation of the spindle motor 44 is completely stopped (S22H), and is completely stopped, that is, after the rotation of the magneto-optical disk 12 is stopped (S22H).
YES), until the first detection sensor 326 turns on,
The drive motor 56 is reversely driven (S22I, S22J,
S22K). As described above, when the first detection sensor 326 is turned on, the cartridge holder 100 moves from the “cartridge loading position” (P3) to the “cartridge receiving position”.
The disk cartridge 42 in the cartridge holder 100, which has been raised to the “cartridge receiving position” after being raised to the “cartridge pull-in completion position”.
From (P2) to "Cartridge unload position" (P1)
Is pushed out to. In this way, the unloading process ends, and the process returns to the original main routine.

By bringing the disc cartridge 42 to the "cartridge unloading position" (P1) in this way, a part of it is projected outward from the bezel opening 34. In this way, the operator can easily grasp a part of the protruding disk cartridge 42 and manually pull it out from the magneto-optical disk device 10.

It is needless to say that the present invention is not limited to the configuration of the above-described embodiment and can be variously modified without departing from the scope of the present invention.

For example, in the above-mentioned embodiment, the front position restricting pieces 26f, 26 in which the front portion of the magnetic head mounting base 62 is mounted on the loading chassis 26.
The magnetic head mounting base 62 is brought into contact with the magnetic head mounting base 62 by contacting the rear part with the rear position regulating pins 24a and 24b standing on the optical head mounting base 24.
However, the present invention is not limited to such a configuration, and the front position regulating piece may be formed on the optical head mounting base 24, or the rear position regulating piece may be formed on the rear side. Positioning pin for loading chassis 2
It goes without saying that it may be configured to be formed in No. 6.

Further, in the above-described embodiment, the wire springs 204 and 206 are used as the biasing means, but the present invention is not limited to such a structure, and may be, for example, a control cam member. Pressing pieces 200a, 200b; 200c, 2 formed integrally with 102 and 104, respectively.
If the elastic force of 00d itself is sufficient, this stepping force can be used as the urging force in the urging means, and the urging members corresponding to the wire springs 204 and 206 can be replaced with the control cam plates 102, It goes without saying that it may be configured to be provided separately from 104.

[0249]

As described above in detail, according to the magneto-optical disk apparatus of the present invention, the magnetic head mounting base to which the magnetic head is mounted is positioned while the vertical position of the magnetic head is securely maintained. You will be able to do it. As a result, writing (or overwriting) of information on the recording layer of the magneto-optical disk via the magnetic head can be executed more reliably.

[Brief description of drawings]

FIG. 1 is a front view showing the external configuration of an embodiment of a magneto-optical disk device according to the present invention.

FIG. 2 is a right side view showing an external configuration of an embodiment of a magneto-optical disk device according to the present invention.

FIG. 3 is a rear view showing an external configuration of an embodiment of a magneto-optical disk device according to the present invention.

FIG. 4 is a top view showing an external configuration of an embodiment of a magneto-optical disk device according to the present invention.

5 is a perspective view showing a disc cartridge in which a magneto-optical disc used in the magneto-optical disc device shown in FIGS. 1 to 4 is rotatably housed, with a shutter in a closed position.

6 is a perspective view showing a disc cartridge in which a magneto-optical disc used in the magneto-optical disc device shown in FIGS. 1 to 4 is rotatably housed, with a shutter in an open position.

7 is an exploded perspective view schematically showing the internal structure of the magneto-optical disk device shown in FIGS. 1 to 4. FIG.

FIG. 8 is a right side view showing the configuration of an attachment mechanism for attaching the front bezel to the main frame.

FIG. 9 is a transverse cross-sectional view showing the attachment mechanism shown in FIG. 8 taken along the line AA.

FIG. 10 is a vertical cross-sectional view showing the attachment mechanism shown in FIG. 9 taken along the line BB.

11 is a right side view for explaining a mounting state of the front bezel to the main frame in the mounting mechanism shown in FIGS. 8 to 10. FIG.

12 is a right side view showing a configuration relating to a modified example of the attachment mechanism shown in FIG.

13 is a cross-sectional view showing a state in which the front bezel of the attachment mechanism shown in FIG. 12 is being attached to the main frame.

14 is a cross-sectional view showing a state where the front bezel is attached to the main frame in the attachment mechanism shown in FIG.

FIG. 15 is a left side view schematically showing the internal configuration of the magneto-optical disk device shown in FIGS. 1 to 4.

16 is a front view schematically showing an internal configuration of the magneto-optical disk device shown in FIGS. 1 to 4. FIG.

FIG. 17 is a side view showing the cartridge holder taken out.

FIG. 18 is a plan view showing only the left half of the cartridge holder taken out.

FIG. 19 is a perspective view showing a structure in which an optical base unit is taken out and arranged on the optical base unit.

FIG. 20 is a front sectional view showing a mounting state of a linear bearing and a linear motor for an optical head carriage and a linear bearing and a linear motor for a magnetic head carriage.

FIG. 21 is a perspective view showing the structure of the magnetic head actuator base taken out and arranged on the lower surface thereof.

FIG. 22 is a perspective view showing a loading chassis taken out.

FIG. 23 is a right side view showing the configuration of a left control cam plate.

FIG. 24 is a left side view showing a configuration of a left control cam plate.

FIG. 25 is a left side view showing the configuration of the control cam plate on the right side.

FIG. 26 is a right side view showing the configuration of the right control cam plate.

FIG. 27 is a diagram for explaining the shape of a cam groove formed on each control cam plate.

FIG. 28 is a perspective view showing a state where a shutter plate and a shutter plate opening / closing mechanism are taken out.

FIG. 29 is a perspective view showing the shutter plate and the shutter plate opening / closing mechanism taken out from a direction different from that of FIG. 28;

FIG. 30 is a side sectional view showing the shutter plate opening / closing mechanism in a state in which the disc cartridge is not loaded.

FIG. 31 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the disc cartridge is slightly inserted into the chassis opening.

FIG. 32 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the disc cartridge is inserted into the inlet portion of the cartridge holder.

FIG. 33 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the load / unload mechanism is activated.

FIG. 34 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the locking portion of the movable gear tries to come into contact with the lower surface of the gear chassis from below.

FIG. 35 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the swing lever has been rotated to the uppermost position.

FIG. 36 is a side sectional view showing the shutter plate opening / closing mechanism in a state where the swing lever is rotated to the uppermost position and the shutter plate is in a vertical state.

FIG. 37 is a side sectional view showing the shutter plate opening / closing mechanism in a state in which the disc cartridge is brought to the loading position and in which the chassis opening is completely closed.

FIG. 38 is a plan view showing the configuration on the gear chassis.

FIG. 39 is a front view showing the configuration on the gear chassis.

FIG. 40 is a left side view showing the configuration on the gear chassis.

FIG. 41 is a right side view showing the configuration on the gear chassis.

FIG. 42 is a plan view showing the configuration of the bottom plate on the gear chassis and the attachment state of the link arms.

43 is a plan view showing a configuration directly attached to the configuration shown in FIG. 42 except for the detection / drive gear.

44 is a plan view showing a configuration directly mounted on the configuration shown in FIG. 43 except for the detection / drive gear.

FIG. 45 is a perspective view showing a configuration around a slide plate.

FIG. 46 is a plan view showing the configuration of a detection / drive gear.

FIG. 47 is a timing chart showing a detection state during the loading operation of the disc cartridge.

FIG. 48 is a timing chart showing a detection state during the loading operation of the magnetic head.

FIG. 49 is a timing chart showing a detection state during the unloading operation of the magnetic head.

FIG. 50 is a timing chart showing a detection state during the unloading operation of the disc cartridge.

FIG. 51 is a timing chart showing a detection state when the magnetic head is forcibly unloaded by the biasing force of the return spring when the power is cut off.

52 is a timing chart showing a detection state in the detection / drive gear returning operation from the forced unload state shown in FIG. 51. FIG.

53 is a timing chart showing a detection state at the same time when the magnetic head is reloaded from the detection / drive gear return state shown in FIG. 52.

FIG. 54 is a plan view showing the planar shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge unload position” (P1) is detected.

FIG. 55 is a plan view showing the planar shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge retracting completion position” (P2) is detected.

FIG. 56 is a plan view showing the planar shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge load position” (P3) is detected.

FIG. 57 is a plan view showing a planar shape of the internal configuration of the magneto-optical disk device in a state where the “magnetic head load position” (P4) is detected.

FIG. 58 is a plan view of the internal configuration of the magneto-optical disk device, in which an intermediate position (P5) in which the cartridge is unloaded from the “cartridge pull-in completion position” (P2) to the “cartridge unload position” (P1) is detected. It is a top view shown in the state where it was made.

FIG. 59 is a left side view showing the left side shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge unload position” (P1) is detected.

FIG. 60 is a right side view showing the right side shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge unload position” (P1) is detected.

FIG. 61 is a left side view showing the left side shape of the internal structure of the magneto-optical disc device in a state where the “cartridge pull-in complete position” (P2) is detected.

FIG. 62 is a right side view showing the right side shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge pull-in complete position” (P2) is detected.

FIG. 63 is a left side view showing the left side shape of the internal structure of the magneto-optical disk device in a state where the “cartridge load position” (P3) is detected.

FIG. 64 is a right side view showing the right side shape of the internal structure of the magneto-optical disk device in a state where the “cartridge load position” (P3) is detected.

FIG. 65 is a left side view showing the left side shape of the internal structure of the magneto-optical disc device in a state where the “magnetic head load position” (P4) is detected.

FIG. 66 is a right side view showing the right side shape of the internal structure of the magneto-optical disc device in a state where the “magnetic head load position” (P4) is detected.

FIG. 67 shows the shape of the left side surface of the internal configuration of the magneto-optical disk device, with the intermediate position (P5) being unloaded from the “cartridge pull-in complete position” (P2) to the “cartridge unload position” (P1). It is a left side view shown in the state where it is detected.

FIG. 68 shows the shape of the right side surface of the internal configuration of the magneto-optical disk device, showing the unloading midway position (P5) from the “cartridge pull-in completion position” (P2) to the “cartridge unload position” (P1). It is a right side view shown in the state where it is detected.

FIG. 69 is a left side view showing the front shape of the internal configuration of the magneto-optical disk device in a state where the “cartridge unload position” (P1) or the “cartridge retracting completion position” (P2) is detected. .

FIG. 70 shows the front shape of the internal structure of the magneto-optical disk device as “cartridge loading position” (P3), or
It is a left side view shown in the state where the "magnetic head load position" (P4) is detected.

FIG. 71 is a plan view showing the planar shape of the configuration on the gear chassis in a state where the “cartridge insertion detection position” is detected.

FIG. 72 is a plan view showing a planar shape of the configuration on the gear chassis in a state where it is detected that the magnetic head is forcibly unloaded to the “intermediate position” by the urging force of the return spring in a power-off state. It is a figure.

FIG. 73 shows the positional relationship between the disk cartridge and the magnetic head actuator base in the magneto-optical disc device when the “cartridge unload position” (P1) or the “cartridge pull-in completion position” (P2) is detected. It is a front view shown by.

FIG. 74 is a front view showing the positional relationship between the disk cartridge and the magnetic head actuator base in the magneto-optical disk device, with the “cartridge load position” (P3) being detected.

FIG. 75 is a front view showing the positional relationship between the disk cartridge and the magnetic head actuator base in the magneto-optical disk device in a state where the “magnetic head load position” (P4) is detected.

FIG. 76 is a left side view showing the positional relationship among the disc cartridge, the magnetic head, and the magneto-optical disc in the magneto-optical disc device in a state where the “cartridge pull-in complete position” (P2) is detected.

77 is a left side view showing the positional relationship among the disc cartridge, the magnetic head, and the magneto-optical disc in the magneto-optical disc device in a state where the “cartridge loading position” (P3) is detected. FIG.

FIG. 78 shows the positional relationship among the disk cartridge, the magnetic head, and the magneto-optical disk in the magneto-optical disk device, the “magnetic head load position” (P4) is detected, and the magnetic head and the magneto-optical disk are the outermost circumferences. It is a left side view shown in the state where it is in a position.

FIG. 79 shows the positional relationship among the disk cartridge, the magnetic head, and the magneto-optical disk in the magneto-optical disk device, the “magnetic head load position” (P4) is detected, and the magnetic head and the magneto-optical disk are located at the innermost position. It is a left side view shown in the state where it is in a peripheral position.

FIG. 80 is a front sectional view showing the structure of a horizontal positioning mechanism.

81 is a bottom view showing the lower surface configuration of the magnetic head actuator base provided with the horizontal positioning mechanism, taken out. FIG.

FIG. 82 is a bottom view showing the configuration of the horizontal positioning mechanism.

FIG. 83 is a side sectional view showing the configuration of a horizontal positioning mechanism.

FIG. 84 is a side view showing an attached state of the lock mechanism.

85 is a side view showing a locked state of the lock mechanism. FIG.

86 is an enlarged bottom view showing the configuration of the lock mechanism. FIG.

FIG. 87 is a side sectional view showing the configuration of the lock mechanism and the enlargement thereof.

FIG. 88 is a plan sectional view showing the configuration of the laser optical system.

FIG. 89 is a diagram showing a mounting configuration of a beam splitter.

FIG. 90 is a flowchart showing a control procedure of overall control in the control circuit.

91 is a flowchart showing a control procedure as a subroutine when a loading process is called in the main routine shown in FIG. 90.

92 is a flowchart showing a control procedure as a subroutine when a loading process is called in the main routine shown in FIG. 90.

93 is a flowchart showing a control procedure as a subroutine when an unloading process is called in the main routine shown in FIG. 90.

[Explanation of symbols]

X loading direction Y moving direction of shutter 46 Z mounting reference surface 10 magneto-optical disk device 12 magneto-optical disk 12a disk body 12b hub 14 magnetic head 16 optical head 18 main frame 24 optical head mounting base 24a; 24b rear position regulating pin 26 loading Chassis 26f; 26g Front position regulation piece 42 Disk cartridge 52 Automatic load / unload mechanism 56 Drive motor 60 Timing detection mechanism 62 Magnetic head mounting base 64 Vertical direction positioning mechanism 68 Magnetic head carriage 100 Cartridge holder 102; 104 Control cam plate 102b ₁ 102b ₂ ; 104b ₁ ; 104b ₂
Cam groove for vertical movement of magnetic head actuator base 106a; 106b; 106c; 106d Cam pin 108a; 108b; 108c; 108d Mounting stay 110 Spindle 112 Guide groove 200a; 200b; 200c; 200d Pressing piece 202; 204 Wire spring 334a; 334b Rearward Positioning pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Okuda 2-39-9 Maeno-cho, Itabashi-ku, Tokyo Asahi Kogaku Kogyo Co., Ltd. (72) Inventor Shun Takishima 2-36-9 Maeno-cho, Itabashi-ku, Tokyo No. Asahi Kogaku Industry Co., Ltd.

Claims (5)

[Claims] 1. A magneto-optical disk apparatus capable of repeatedly recording information on a magneto-optical disk via an optical head and a magnetic head, and a cartridge receiving position for receiving a disk cartridge inserted in the apparatus and the information by the optical head. reading/
A cartridge holder movable between a writable cartridge loading position and a direction orthogonal to the insertion direction of the disc cartridge, and a magnetic head mounted so as to be movable in the radial direction of the magneto-optical disc. Light in the disk cartridge held by the cartridge holder at the cartridge loading position and the standby position at a position further away from the optical head than the cartridge holder at the cartridge receiving position along the moving direction of the cartridge holder. Regarding a magnetic head mounting base that is movable along a direction parallel to the moving direction of the cartridge holder between a magnetic head loading position that brings the magnetic head close to a magnetic disk, and the insertion direction of the magnetic head mounting base. Located upstream A front positioning member that abuts in a state where one side portion is brought to the magnetic head loading position, and a rear portion that is located downstream in the insertion direction of the magnetic head mounting base is brought to the magnetic head loading position. With the abutting rear positioning member and the magnetic head mounting base brought to the magnetic head loading position, the front portion of the magnetic head mounting base is elastically abutted on the front positioning member, and the rear portion of the rear positioning member is positioned rearward. A magneto-optical disk device comprising: a biasing unit that elastically abuts on a member. 2. A loading chassis having an opening formed on one side for inserting a cartridge, and an optical head mounting base on which the optical head is mounted so as to be movable along the radial direction of the magneto-optical disk. 2. The magneto-optical disk apparatus according to claim 1, wherein the front positioning member is integrally formed with the loading chassis, and the rear positioning member is integrally formed with the optical head mounting base. . 3. A pair of cam plates mounted on the loading chassis so as to be capable of reciprocating along the insertion direction, and having cam grooves formed with cam pins formed on both side edges of the magnetic head mounting base. The cam plate reciprocates along the insertion direction, so that the magnetic head mounting base moves in the standby state as the fitting position between the cam pin and the cam groove changes. 3. The magneto-optical disk device according to claim 2, wherein the magneto-optical disk device is formed so as to be reciprocally driven between a position and the magnetic head loading position. 4. The pressing means is formed so as to be displaceable on each of the cam plates and abuts against the cam pin reaching a portion of each cam groove defining the magnetic head load position, and the pressing piece. A spring member for biasing the front portion of the magnetic head mounting base so as to elastically abut on the corresponding front positioning member and the rear portion for elastically abutting on the corresponding rear positioning member. The magneto-optical disk device according to claim 3, further comprising: 5. The cam pins are attached to the front and the rear of each side edge of the magnetic head mounting base, and the cam grooves are provided to the front and the rear of the cam plate so that the front and rear cam pins are fitted respectively. The magneto-optical disk according to claim 4, wherein the spring members formed respectively and attached to the respective cam plates are provided with wire springs for pressing the pressing pieces respectively formed in the front and rear cam grooves. apparatus.