JPS6320749A - Magneto-optical information recording device - Google Patents

Abstract

PURPOSE:To miniaturize the whole device by providing a pair of solenoid plungers to drive a supporting mechanism so as to move in parallel a pair of plate-shaped magnets provided in parallel. CONSTITUTION:The magnetic field giving means giving the magnetic field in the reverse direction to the magnetizing direction of the perpendicularly magnetized film of a disk 15 thereto is provided with a pair of plate-shaped magnets 181, 182 extending in parallel along the moving route of the emission means to move with emitting the light beam modulated by the recorded information and being arranged so that the magnetic pole may be made reverse each other. The supporting mechanism consisting of an intermediate member 178, sliders 179, 180, etc., which supports these both magnet freely movably along perpendicularly magnetized film and in the direction at about right angle with the extension direction of both magnets and a part of solenoid plungers 181, 182 which drive the supporting mechanism so as to move both magnets 181, 182 with the output shafts 184, 185 being provided so as to project reversely each other, are equipped as well. The miniaturization of the whole magneto- optical information recording device, especially in the direction at right angles with the recording face of the disk 15 can be realized.

Description

[Detailed description of the invention] Technical field The present invention relates to a magneto-optical information recording device.

BACKGROUND ART For example, a magneto-optical information recording device is known that records information using a disk having a recording surface made of an amorphous alloy thin film. This is because the thin film is a so-called perpendicular magnetization film whose magnetization direction is perpendicular to the film surface, and when the thin film is heated above the Curie temperature or compensation temperature, the perpendicular magnetization direction or the weak external magnetic field It records data by taking advantage of the property that it can be changed by In other words, in a predetermined direction (corresponding to "0" of a binary signal)
Apply a bias magnetic field in the opposite direction to the thin film magnetized by the magnetic field applying means, irradiate the light beam only to the part where you want to record "1", and use the energy to heat it above the Curie temperature or compensation temperature. The magnetization direction of a portion is controlled in the opposite direction, and this is set as a focus, and the pits are recorded as a continuous spiral track.

Note that the reproduction of recorded information utilizes the Kerr effect, which is an interaction between magnetism and light, and while the linearly polarized irradiation light is incident on the perpendicularly magnetized film and reflected, the polarization plane becomes vertical. Since it rotates depending on the direction of magnetization, reproduction is possible by measuring the rotation angle using an analyzer.

By the way, in the above disc, recording track 1
The magnetization direction is set to be opposite for each round to eliminate the influence between adjacent tracks. Therefore, when recording information, it is necessary to switch the magnetization direction of the bias magnetic field described above every track round, that is, every revolution of the disk. Therefore, in already developed magneto-optical information recording devices, as the magnetic field applying means, an electromagnetic type or a rectangular prism-shaped magnet is used as the magnetic field applying means.
A system is installed in which the direction of magnetization is changed by rotating the magnet. However, these magnetic field applying means require a relatively large space for installation, which is one of the problems that must be solved in order to downsize the entire magneto-optical information recording device. Additionally, electromagnets generate a large amount of heat, and there was concern that they would have a negative impact on other components.

Summary of the invention The present invention has been made in view of the above points, and
The purpose is to provide a magneto-optical information recording device that is easy to miniaturize as a whole, and in which the magnetic field applying means can follow the magnetization direction of the perpendicularly magnetized film, which changes every track round. be.

In the magneto-optical information recording device according to the present invention, the light emitting means moves while emitting a light beam modulated by recorded information. a pair of flat magnets extending in parallel along the path and arranged so that their magnetic poles are in opposite directions; and a pair of solenoid plungers whose output shafts are provided so as to protrude in opposite directions and drive the support mechanism so as to move both of the magnets. It is said that

Embodiments Hereinafter, a magneto-optical information recording and reproducing apparatus including a magneto-optical information recording apparatus as an embodiment of the present invention will be described with reference to the accompanying drawings.

The magneto-optical information recording/reproducing device is configured such that a bias magnetic field in a direction opposite to the predetermined direction is applied to a disk including a perpendicular magnetization film magnetized in a predetermined direction by a magnetic field applying means, and the magnetic field is modulated by recorded information. Information is recorded by emitting a light beam using a light emitting means. In addition, when reproducing recorded information, due to the Kerr effect, which is an interaction between magnetism and light, while the linearly polarized irradiation light is incident on the perpendicularly magnetized film and reflected, the polarization plane is Reproduction is performed by utilizing the fact that the magnet rotates depending on the direction of magnetization, and measuring the rotation angle using a predetermined analyzer. In addition, in the magneto-optical information recording/reproducing apparatus, a disk to be recorded or reproduced is housed in a flat cartridge, and recording/reproduction is performed in this housed state.

Among the mechanisms included in the magneto-optical information recording and reproducing apparatus, first, the recording and reproducing means that performs the above-mentioned recording and reproducing will be described.

A frame 1 shown in FIGS. 1 to 4 is provided in a housing (described later) of the magneto-optical information recording and reproducing apparatus, and is attached to the housing via four leg members 2 and 3. ing. Note that the frame 1 is made of aluminum or an alloy thereof.

A pair of cylindrical steel support rails 5 and 6 extending in the direction of arrow Y and the opposite direction and spaced apart in the direction of arrow Z and the opposite direction are fixed to this frame 1 at both ends thereof. .

A longitudinal pickup body 7 as a holding member extending in the arrow Z direction and the opposite direction or both support rails 5
．． 6, and is movably supported by both support rails. This pickup body 7 is also made of aluminum or its alloy. Two steel rollers 8 are attached to one side of the pickup body 7 to roll on the support rail 5.

There are also two on the other side of the pickup body 7, a total of 4
Two other steel rollers 9 are mounted at two intervals apart in the direction of movement of the pickup body, and are in contact with the other support rail 6. As is particularly clear from FIG. 4, the pickup body 7 is supported at three points by both support rails 5 and 6 via the aforementioned rollers 8 and 9.

As shown in FIG. 4, a roller 8 provided on one side of the pickup body 7 is attached to a pin 1
1 to the free end of a swing lever 12 which is swingably mounted in the direction of arrow R. Note that the direction of arrow R is perpendicular to the direction of movement of the pickup body (direction of arrow Y and its opposite direction). Further, a spring member 13 is provided as a suppressing means for pressing the roller 8 against the support rail 5. 3 mentioned above
By pressing the roller 8 on the one point side of the point support against the support rails in this way, the rollers 9 on the other two point sides are also pressed against the other support rail 6 by the reaction force. Note that the magneto-optical information recording/reproducing device is installed so that the direction of arrow Z is the anti-gravitational direction. That is, the roller 8 on the one-point side is always positioned in the anti-gravity direction with respect to the roller 9 on the two-point side. This prevents the spring member 13 for pressing the roller 8 against the support rail 5 from receiving a large weight of the pickup body 7 or the like.

In addition, both the above-mentioned support rails 5 and 6 and the steel roller 8,
9, the spring member 13, and peripheral small members related thereto constitute a support means that supports the pickup body 7 so as to be movable along the recording surface of the disk 15, which is a recording medium.

As shown in FIGS. 2 and 4, in frame 1,
A pair of longitudinal magnetic circuits 20 are fixed, each extending along the direction of movement of the pickup body 7 (the direction of arrow Y and the opposite direction thereof) and consisting of a longitudinal magnet 16 and a longitudinal yoke 17, 18 which are engaged with each other. Further, as shown in FIG. 2, a pair of drive coils 21 are attached to the pickup body 7 so that the center axis of the coils is parallel to the moving direction of the pink-up body. The magnetic circuit 20 described above generates a magnetic flux that interlinks with the drive coil, and together with the drive coil constitutes a linear motor as a moving force applying means for applying a moving force to the moving optical system including the pickup body 7.

Note that the linear motor applies a moving force to a portion of the moving optical system including the pickup body 7 that corresponds to a node of primary transverse vibration.

As shown in FIG. 2, a detection coil 22 is wound around the outer periphery of each drive coil 21 described above so that the center axis of the coil is concentric with the center axis of the drive coil. The magnetic flux described above and emitted from the magnetic circuit 20 of the near motor also interlinks with this detection coil 22. These magnetic circuit 20 and detection coil 22 constitute a speed detecting means for detecting the moving speed of the pickup body 7 and controlling the moving speed. That is, the magnetic circuit 20 constituting the linear motor is also used as the magnetic circuit of the speed detecting means.

As is clear from FIG. 2, the aforementioned steel rollers 8 and 9 are arranged on the yoke 17 side of the magnetic circuit 20.

As shown in FIGS. 1, 3, and 4, a flat rectangular parallelepiped holding member 25 is attached to the rear end of the frame 1. As shown in FIGS. As shown in FIG. 5, this holding member 25 includes a laser diode 27 as a light emitting element,
A collimator lens 28 that converts the irradiation light emitted from the laser diode into parallel light, a condensing lens 29, and a disk 1
5-3 A light receiving element 30 for finally receiving the reflected light from the recording surface to obtain an information signal, shaping the irradiation pattern of the parallel light emitted through the collimator lens 28, and guiding it to the objective lens described later. A compound prism 31 that guides the reflected light from the disk recording surface to the light receiving element 3o, and an astigmatism that imparts astigmatism to the reflected light for the purpose of detecting the focal error of the light beam emitted toward the disk recording surface. Element 32 is attached. Further, as shown in FIG. 5, on the side of the composite prism 31, there is a monitor light receiving element 34 for detecting a part of the parallel light that is reflected within the composite prism and irradiated to the outside. is located.

FIG. 6 shows the view from ■-■ in FIG. 5, and as is clear from both figures, the laser diode 27 is fitted into a counterbore formed in the rectangular plate-shaped holder 35. and is attached to the holding member 25 via the holder. As shown in FIG. 6, a substantially triangular holding plate 36 is provided to prevent the laser diode 27 from being removed from the holder 35, and is fixed to the holder 35 with screws 37.

The rectangular plate-shaped holder 35 described above is movable with respect to the holding member 25 together with the supported laser diode 27 in a plane perpendicular to the optical axis of the laser diode, in this case, in the direction of arrow Y and in the opposite direction. It has become. As a result, the relative positions of the laser diode 27 and the collimator lens 28 within the city are adjusted, and the parallel light emitted toward the pickup body 7 through the collimator lens 28 is matched with the moving direction of the pickup body. be.

Note that the laser diode 27 and the collimator lens 28
, a composite prism 31, and a holding member 2 that holds them.
5 are collectively referred to as a light source mount.

Further, the light source mount is movable in parallel in the direction of arrow Z perpendicular to the optical axis of the parallel light emitted toward the pickup body 7 through the collimator lens 28 and the compound prism 31, and in the opposite direction. Further, the objective lens and its servo drive mechanism, which will be described later, are movable in parallel on the pickup body 7 in the direction of arrow Y and in the opposite direction. As a result, the relative position of the light source mount and the objective lens (described later) is adjusted in the Y-2 plane, and the center axis of the intensity distribution of the parallel light emitted toward the pickup body 7 is adjusted to the position of the light source mount and the objective lens (described later). It can be aligned with the axis.

FIG. 7 shows the view from ■--■ in FIG. 5, and as is clear from both figures, the light receiving element 30 is also attached to the holding member 25 via a rectangular plate-shaped holder 39. This holder 39 has a notch 40 that has a clearance in the X direction, the Y direction, and the directions opposite thereto and engages a screw 41, and is fixed to the holding member 25 by the screw 41. Position adjustment is possible within the clearance range.

FIGS. 8 and 9 show a cross section along ■--■ and a cross-section along IX-IX in FIG. 5, respectively.
8. The part that holds the condensing lens 29 and the astigmatism element 32 is a groove 43.44 whose cross section perpendicular to the optical path is V-shaped.
and 45.

As shown in FIG. 5, the composite prism 31 is formed by joining two prisms, a first prism 48 and a second prism 49. The first prism 48 is a collimator lens 28
a circular correction surface 50 that is inclined at a predetermined angle with respect to the parallel light obtained through the parallel light and performs circular correction of the parallel light (makes the elliptical irradiation pattern of the parallel light circular); a total reflection surface 51 that totally reflects the parallel light reflected by the total reflection surface, and a polarization reflection surface 52 that transmits the parallel light reflected by the total reflection surface and guides the reflected light from the disk recording surface to the light receiving element 30. There is. Further, the second prism 49 is attached to this polarized light reflecting surface 52, and works in cooperation with the polarized light reflecting surface to guide the reflected light from the disk recording surface to the light receiving element 30. The polarization reflecting surface 52 extends widely to serve as a reference surface, and by using the reference surface as a reference, the second prism 49 and the like can be easily positioned.

In addition, as shown in FIG. 5, the collimator lens 28
The angle between the parallel light emitted through and this reference plane is 4
It is 5°. This makes the incident optical axis 54 and the outgoing optical axis 55 parallel to the composite prism 31, making it easy to arrange the laser diode 27 and the light receiving element 30.

As shown in FIG. 3, the pickup body 7 includes:
A total reflection prism 57 is provided as a guide means for bending the optical path of parallel light emitted through the collimator lens 28 and compound prism 31 at right angles. Also,
As shown in FIGS. 1 and 2, the pickup body 7 includes an objective lens 58 for focusing the parallel light that has passed through the total reflection prism 57 onto the recording surface of the disk 15 as a minute spot light; The objective lens includes a holder 59 and a support member 60 (shown in the first figure), and the objective lens is
arrow F direction) and a direction perpendicular to this (arrow T direction'')
An objective lens support mechanism that supports the objective lens movably in two directions, a magnetic circuit consisting of a magnet 62 and a yoke 63, and a means for interlinking magnetic flux from the magnetic circuit (a coil (not shown) wound around five holders). A drive source is provided which applies a force to move the objective lens 58 in the two directions. Note that this drive source and the objective lens support mechanism described above are collectively referred to as a servo drive mechanism. That is, The servo drive mechanism drives the objective lens 58 using electromagnetic force.

As shown in FIG. 4, a flexible printed circuit board 65 is provided for supplying drive current to the servo drive mechanism mounted on the pickup body 7. The printed circuit board is bent into a U-shape in its thickness direction, and is disposed within the movement locus of the pickup body 7 so that its thickness direction is parallel to the recording surface of the disk 15. As shown in FIGS. 1 and 3, a turntable 66 is provided in front of the pickup body 7 and rotates while supporting the disk 15. As shown in FIGS.

As shown in FIG. 4, a rack portion 71 is provided at one end of the pickup body 7 along the direction of movement of the pickup body (the direction of arrow Y and the opposite direction thereof). Further, a rack member 72 is arranged near the rack portion along the moving direction of the pickup body 7 and corresponding to the entire length of the movement stroke, and can be freely engaged with and disengaged from the rack portion 71. so frame 1
movably attached to. Further, although not shown, a spring member is provided as a pressing means for pressing the rack member 72 toward the rack portion 71 so as to mesh with the rack portion 71 .

These spring members 71 and rack members 72 constitute fixing means for fixing the pickup body 7 to the frame 1, that is, to the housing (described later). The rack member 72 is configured to be detached from the rack portion 71 by a cartridge holder, which will be described later.

It should be noted that all the materials described so far constitute most of the recording/reproducing means for recording information on the disk 15 and reproducing the same.

In FIG. 10, reference numeral 75 indicates the entire magneto-optical information recording and reproducing apparatus. As shown in FIGS. 1 to 3, the disk 15 is rotatably housed in a cartridge 77, and information can be recorded on and reproduced from the disk while in this housed state. 1st
As shown in FIG. 0, the cartridge 77 and its storage disk 15 are inserted into the housing through a slot 80 formed in a front panel 79 of a housing 78 that covers the entirety of the magneto-optical information recording/reproducing device. .

Here, the cartridge 77 will be explained in detail based on FIGS. 11(a) to 13.

As is clear from FIGS. 11(a) and (b), the cartridge 77 has a main body 83 formed as a flat rectangular plate as a whole, and the disk 15 is rotatably housed within the main body. has been done. A substantially circular hole 84 is formed at substantially the center of both the front and back surfaces of the main body 83, and the center of the disk 15 is exposed through the hole.
5 can be placed on the disk supporting surface 85 (shown in the third figure) of the turntable 66 (see figure M3, etc.) to rotate (drive) the disk. In addition, the main body 8
A substantially rectangular opening 87 communicating with the hole 84 is formed in the main surface of the disc 3, and the recording/reproducing means described above can access the disk 15 through this opening 87.

A lid 88 that can close the opening 87 and the hole 84 is provided on the main body 83, and in the Z direction and the opposite direction, the opening 87 is located at a position where the hole 84 is closed and opened. It can be slid freely between positions. Further, as shown in FIG. 11, the lid body 88 has an opening 8.
A coil spring 89 is connected as a biasing means for biasing the lid in the direction of closing the hole 7 and the hole 84 (in the direction of arrow Z).

The lid body 88 is made of a stainless steel plate or the like, and as is particularly clear from FIGS. 11 and 12, it includes a base portion 90 that is slidably engaged with the end of the main body 83 in the insertion direction into the slot 80, and The main body 83 is formed integrally with the base portion.
It consists of an opening 87 and a closing part 91 that can close the hole 84.

For the cartridge 77 configured in this manner, there is a direction in the housing 78 that opens the opening 87 and the hole 84 when the cartridge is inserted into the housing through the slot 80 (shown in FIG. 10). Lid body 88
A lid moving means is provided for moving the lid using its insertion force.

This lid moving means will be explained. Figure 11.

As shown in FIGS. 13 to 16, the lid moving means is provided in the housing 78 so as to be able to swing freely relative to each other around support shafts 93 and 94, and is provided in the cartridge insertion path.
A pair of lever members 95 and 96 are provided to be inclined with respect to the direction of the arrow Y), and a base portion 90 of the lid body 88 (see FIG. A pin 99 that can be fitted into a notch 98 formed in the
100, and a coil spring 101 that applies a bias tension to both lever members. That is, when the cartridge 77 is inserted through the slot 80 (shown in FIG. 10) in the direction opposite to the arrow Y, one lever member, in this case lever member 9, as shown in FIGS. 11 and 13.
A pin 99 protruding from the free end of 5 fits into the notch 98 of the base portion 90, and as the cartridge 77 is inserted, the lever portion +4 moves in the direction of arrow U (also shown in FIG. 14). The lid body 88 is moved in the opening direction (counter-arrow Z direction). Further, the pin 100 protruding from the other lever member 96 comes into contact with the insertion direction end of the main body 83 of the cartridge 77, and as the lever member swings in the direction of arrow W, the insertion direction end It slides on the base part 90 and rides on the base part 90.

The above explanation is for recording or reproducing on, for example, the A side of the disc 15. When recording or reproducing on the B side of the disc 15, the cartridge 77 is turned over and inserted into the slot 80. (i
1O (as shown). Then, the lid 88 is moved in the opening direction by the other lever member 96 and its protruding pin 100, which did not act when recording and reproducing the A side. Note that when the cartridge 77 is pulled out of the slot 80 (shown in the 10th figure), each lever member 95 and 96
is returned to its original rest position (the position shown in FIG. 14) by a coil spring 101 shown in FIG.

As is clear from FIG.
Recesses 104 and 105 are formed corresponding to the connecting portion 103 between the base portion 90 and the closing portion 91 . As described above, the pin 99 protruding from one lever member, for example, the lever member 95, fits into the notch 98 formed in the base portion 90 of the lid 88 and opens the lid in the opening direction. When moving the
The pin 100 protruding from the other lever member 96 slides on the insertion direction end of the main body 83 of the cartridge 77 and then rides on the base body 90 . As is clear from FIGS. 12 and 13, the connecting portion 103 between the base portion 90 and the closing portion 91 is sharp. Therefore, when the pin 100 rides on the base portion 90, it is likely to get caught in the connecting portion 103. However, as described above, the pin 100 or 99 has a portion corresponding to the coupling portion 103 in the recess 10.
5.104, and the pins 99, 100 and the connecting portion 103 do not engage with each other.

Next, the cartridge 77 inserted through the slot 80 (shown in FIG. 10), which is provided in the housing 78 together with the above-mentioned recording and reproducing means, is guided to the recording and reproducing position together with the disc 15 therein, and the disc is placed on the turntable 6.
6 (see FIG. 3, etc.), the guide conveyance means for conveying and placing the disk on the disk holding surface 85 will be explained.

As shown in FIGS. 15 to 20 (a), (b), and (c), the lateral direction (in the direction of arrow Z and the opposite direction) of the frame 1, which is the main component of the recording/reproducing means described above, is shown in FIGS. Two vertical chassis 106 and 107, which are the main components of the guide vehicle transport means, are fixed at both ends. Note that FIG. 19 shows the general arrangement of each member, and in this figure, the shape of each member is schematically represented. A pair of flat plate-shaped moving members 109 and 110 are arranged on the outside of each of these vertical chassis 106 and 107.
direction) so as to be reciprocally movable along the respective knitting chassis. These moving members 1 are shown in FIGS. 21 and 22.
09,110 details are shown.

Ru. Vertical chassis 106 of each moving member 109 and 110.
21 and 2.
As is particularly clear from FIG. 2, each moving member 109, 110
are formed with a plurality of elongated holes 111, 112 extending in the direction of movement (direction of arrow Y and the opposite direction), and the same number of pins 113. The elongated hole is slidably engaged with 114.

As shown in FIGS. 14, 16, and 22, one of the pair of moving members 109, 110 has a rear end portion extending along the moving direction of the moving member. A rack member 116 is attached thereto. On the other hand, as shown in FIGS. 14 and 16, a gear transmission mechanism 117 including a final gear that meshes with the rack member 116, and a worm 118 that meshes with the first gear of the gear transmission mechanism are attached to its output shaft. A fitted motor 119 is attached to the vertical chassis 106. These rack members 116. Gear transmission mechanism 117. The worm 118 and the motor 119 constitute a driving force applying means for applying a driving force to the moving member 109.

As shown in FIGS. 14 to 17 and 19, the above-mentioned pair of moving members 109 and 110 are interlocking components consisting of a shaft 122 and a pair of lever members 123 and 124 provided at both ends of the shaft. They are interlocked with each other by a mechanism.

In detail, the shaft 122 has both moving members 109°11
0 and both longitudinal chassis 106 and 107
It is rotatably supported by. Further, each lever member 123, 124 is firmly connected at one end to one end of the shaft 122, and a pin 125, 126 protruding from the inner surface of each other end is connected to each end. Moving member 10
9 and 110, respectively. That is, the driving force applied to one moving member 109 by the driving force applying means including the motor 119 is transferred to the other moving member 110 via the interlocking mechanism.
This is also transmitted, and both moving members 109 and 110 are interlocked.

As shown in FIGS. 14 to 19, pairs of vertical shears 106, 107 and moving members 109.
The cartridge holder 13 is sandwiched by the cartridge holder 110.
1 is arranged, and in the direction of arrow X and the opposite direction, that is, the disk supporting surface 85 of the turntable 66.
It is mounted to the vertical chassis 106, 107 for movement in a direction perpendicular to the (third figure). 23rd
Details of the cartridge holder 131 are shown in Figures (a) to (C). This cartridge holder 131 is
It carries a cartridge 77 inserted into the housing 78 through a slot 80 (10th illustration).

Specifically, as shown in FIGS. 15, 16, and 23(a) to C), a total of three pins 132 are provided protruding from both sides of the cartridge holder 131. On the other hand, as shown in FIGS. 15, 16, and 20(b) and (c), the vertical chassis 106, 107 are marked with arrows
cutout 134 extending in the direction and the opposite direction.
135 is formed, and when the pin 132 is slidably engaged with each of the notches, the cartridge holder 13
1 is attached to each vertical chassis 106,107.

Each pin 132 further protrudes outward from each vertical chassis 106, 107 through the notch 134, 135, and also extends through a cam hole 137 formed in the movable members 109, 110.
, 138 in a slidable manner. The cam holes 134 and 135 are formed so as to have inclined portions that are inclined in the direction of the arrow X in the direction of the arrow Y. In other words, the cartridge holder 131 is moved in the direction of the arrow X and the opposite direction by the movement of the re-moving members 109 and 110 (reciprocating movement in the direction of the arrow Y and the opposite direction).

The above-mentioned moving members 109, 110, a driving force applying means including a motor 119 and applying driving force to the moving members, a shaft 122, and lever members 123, 124 are used for interlocking the re-moving members 109, 110. Guidance for guiding the cartridge 77 together with the disc 15 stored therein to the recording/reproducing position by the interlocking mechanism and the cartridge holder 131, and transporting and placing the disc on the disc carrying surface 85 (shown in the third figure) of the turntable 66. A conveying means is configured. The guide conveyance means also includes a lid moving means (described above) that moves the lid 88 provided on the cartridge 77 in the opening direction using the cartridge insertion force.

Next, the turntable 66 is moved by the guiding conveyance means.
A clamp mechanism for clamping the disk 15 placed above will be explained.

As shown in FIGS. 14 and 19, a substantially flat support member 140 is swingably attached to a shaft 122 for interlocking a pair of moving members 109 and 110. Two support pins 141 extending parallel to the shaft 122 are provided at the free end of the support member 140, and an intermediate member 142 formed in a flat plate shape is swingably supported by the two pins. This intermediate member 1
A disc-shaped suppressing member 143 for pressing the disc 15 against the turntable 66 is rotatably attached to the disc 42 . Further, the pressing member 143 is connected to the turntable 66
Spring member 14 that urges support member 140 to approach
4 is fitted onto the shaft 122. As shown in FIGS. 14 and 15, a small shaft 145 is provided at one end of the support member 140, and a cam portion 146 (shown in FIGS. 15 and 21) formed on the moving member 110
The small shaft is engaged with. That is, the moving member 1
10 moves, the support member 140 swings.

The shaft 122 described above, the support member 140 including the support pin 141, the intermediate member 142, the pressing member 143,
The spring member 144 constitutes a clamp mechanism.

As shown in FIG. 15, a protruding lever 147 and an intermediate lever 148 are arranged near the rear end of the 11 housing 78, and pins 149 and 150 extend in the direction of arrow Z and in the opposite direction, respectively. Vertical chassis 1 through
It is rotatably attached to 07. Projection lever 14
7 has a cartridge 77 (
(see FIG. 11) in the insertion direction. Further, the other rotating end of the protruding lever 147 is pivotally connected to one rotating end of the intermediate lever 148 by a pin 152. Protruding lever 1
47 and the detection switch 15 near the intermediate lever 148.
4 is arranged, and the other end 1 of the intermediate lever 148
55 can be engaged with an actuator 156 of this detection switch 154.

The intermediate lever 148 includes the intermediate lever and the protruding lever 1.
A coil spring 158 is connected to the coil spring 158 for biasing the cartridge 77 in the counterclockwise direction in FIG. 15 to move the cartridge 77 in the direction of arrow Y.

The above-mentioned protruding lever 147, intermediate lever 148, and coil spring 158 constitute protruding means for protruding the cartridge 77 out of the housing 78.

As shown in FIG. 15 and FIG.
An L-shaped hole 160 is formed in the L-shaped hole, and a pin 152 for pivotally connecting the protruding lever 147 and the intermediate lever 148 to each other is slidably fitted into the L-shaped hole. The L-shaped hole 160 consists of a real portion 161 extending in the direction of arrow Y and the opposite direction, and a nub portion 162 extending in the direction of arrow X and the opposite direction. When the cartridge 77 is inserted into the housing 78 and its insertion direction end engages with one rotating end of the protrusion lever 147, the protrusion lever 147 and intermediate lever 148 resist the pulling force of the coil spring 158 due to this insertion force. Rotate clockwise in FIG. 15. Then, the pin 152 moves approximately in the direction of arrow X from the position shown in FIG. Therefore, after this, the moving member 110 moves in the direction of the arrow Y to convey the disk, so that the real portion 16
1 supports the pin 152, and the protruding lever 147 and the intermediate lever 148, which are biased by the coil spring 158 and rotate counterclockwise in FIG. 15, are locked in that position.

Further, as described above, when the cartridge 77 is inserted and the intermediate lever 148 rotates together with the protruding lever 147 in the clockwise direction in FIG. 15, the other rotating end 155 of the intermediate lever operates the detection switch 154. .

This detection switch 154 functions as a detection means for detecting that the cartridge 77 is inserted into the housing 78.

Figures 14 to 16 and Figures 23 (a) and (b)
), (C), the cartridge holder 13
A pair of leaf springs 165 are provided on both sides of the cartridge holder 165 for frictional contact with the cartridge 77 carried on the cartridge holder. A lid body 88 (
A coil spring 89 (shown in FIG. 11) biases the lid (shown in FIG. 11, etc.) in the closing direction, and a coil spring 101 (shown in FIG. 14 shown) has the function of pushing the cartridge 77 out of the housing 78.

The above-mentioned plate spring 165 is composed of each of these coil springs 8
It acts as a movement suppressing means for suppressing the movement of the cartridge relative to the housing 78 against the pushing force (acting in the direction of arrow Y) applied to the cartridge 77 by the cartridges 9 and 101.

Next, a magnetic field applying means for applying a magnetic field in the opposite direction to the perpendicularly magnetized film provided on the disk 15 will be described.

As shown in FIGS. 14 to 16 and FIG. 19, a support 167 bent in a U-shape is disposed behind the clamp mechanism described above, and the support body 167 is bent in a U-shape. It is attached so that it can freely reciprocate in the direction of arrow X and in the opposite direction. For details, see Figure 15.

As shown in FIGS. 16 and 19, support 167
Three notches 168 extending in the direction of arrow X and the opposite direction are formed on both sides of the cartridge holder 131, and three pins 169 protruding from both sides of the cartridge holder 131 are formed.
(Also shown in FIGS. 23(a) to 23(c)) are slidably engaged with the notches. As shown in FIGS. 15, 16, and 19, a pair of pins 170 are protruded from both sides of the support 167 along with the above-mentioned notch 168, and are located on both sides of the cartridge holder 131. Cam holes 171 and 1 formed in the moving members 109 and 110, respectively.
The pin is slidably engaged with 72. This cam hole 1
71.172 is the same as the other cam holes 137.138,
It is formed to have an inclined portion that is inclined in the direction of the arrow Y and in the direction of the arrow X. That is, both pillar moving members 109
．． By reciprocating the support member 110 (in the direction of the arrow Y and the opposite direction), the support body 167 moves in the direction of the arrow X and the opposite direction. As shown in FIG. 15, FIG. 16, FIG. 21, and FIG.
Three diagonal holes 175, 176 are formed corresponding to the locus of movement of pin 9, and each pin moves within each diagonal hole while maintaining a predetermined clearance.

As shown in FIG. 14, a U-shaped intermediate member 178 is provided at the center of the support 167, and a pair of sliders 179 and 180 are connected to the intermediate member. 181, 182 are arrow Z
It is mounted so as to be able to reciprocate in this direction and in the opposite direction. The two-handed plate-shaped magnets 181 and 182 extend parallel to the moving path (in the direction of arrow Y and the opposite direction) of the pickup body 7 (shown in FIG. They are arranged so that their magnetic poles are in opposite directions. Further, the master plate-shaped magnet moves along the perpendicular magnetization film of the disk 15.

The above-mentioned intermediate member 178 and slider 179. 180 is collectively referred to as a support mechanism that movably supports both magnets 181 and 182.

As shown in FIGS. 14 and 18, behind the pair of flat magnets 181 and 182, a pair of solenoid plungers 186 and 187 are provided so that their respective output shafts 184 and 185 project in opposite directions. and is attached to the cartridge 11 reader 131. Both solenoid plungers are for driving the support mechanism (consisting of intermediate member 178 and slider 179, 180) to move the pair of magnets 181, 182 (in the direction of arrow Z and in the opposite direction). It is. In addition, both solenoid plungers 1
Between 86 and 187, there is a Y-
A lever 190 that swings in the Z plane is provided, and the two solenoid plungers drive the support mechanism via this lever 190. Further, a pair of detection switches 195 and 196 are arranged on both sides of the lever 190 so that the free ends of the lever engage with actuators 192 and 193 thereof.

The above-described solenoid plungers 186, 187, a support mechanism including the intermediate member 178 and the like and driven by the solenoid plungers, and flat magnets 181, 182.
This constitutes a magnetic field applying means that applies a bias magnetic field in the forward and reverse directions to the perpendicularly magnetized film provided on the disk 15 and magnetized in advance in a predetermined direction. In addition, the output shafts 184 and 18 of the solenoid plungers 186 and 187
The protrusion operation 5 is performed while the disk 15 rotates once.

As shown in FIGS. 2 and 17, a magnetic shielding member made of a material with high magnetic permeability is provided to cover the magnet 62 and yoke 63, which serve as magnetic field applying means for servo-driving the objective lens 58. 199 is provided. The magnetic shielding member is located between this magnet 62 and the flat magnet 181, 182 described above,
Leakage magnetic flux from both magnets is absorbed by the magnetic shielding member.

As is clear from the above description, the magnetic field applying means including the flat magnets 181 and 182 and the pickup body 7 (shown in FIGS. 2, 3, etc.) are connected to the slot 80 ( The turntable 66 (shown in FIG. 3, etc.) and the clamp mechanism are arranged on the slot side with respect to the magnetic field applying means and the pickup body 7. has been done. Regarding the positional relationship between the support member 140, which is a component of the clamp mechanism, and the shaft 122 that swingably supports the support member, the shaft is located on the slot 80 side with respect to the support member 140.

Next, the operation of the magneto-optical information recording and reproducing apparatus having the above-described configuration will be briefly explained along with the performance procedure.

First, as shown in FIG. 10, the cartridge 77 containing the disc 15 to be recorded or reproduced is inserted into the housing 78 through the slot 80 and carried on the cartridge holder 131 (shown in FIG. 17 etc.).

With this insertion, the lid 8 of the cartridge 77 is opened by the action of lever members 95, 96, etc. shown in FIG.
8 is moved in the opening direction. Immediately before the cartridge 77 is completely inserted into the housing 78, the end of the cartridge in the insertion direction engages with one rotating end 151 of the protruding lever 147 shown in FIG. rotates clockwise in FIG. 15 against the biasing force of the coil spring 158. As a result, the detection switch 154 shown in FIG. 15 operates, and the motor 119 (shown in FIGS. 15 and 16) rotates.

Therefore, the pair of moving members 109 and 110 are moved in the direction of arrow Y, and the cam holes 137 formed in each moving member are moved.
, 138, the cartridge holder 131 carrying the cartridge 77 moves in the opposite direction of arrow Z, and the disk 15 moves onto the disk supporting surface 85 of the turntable 66.
(Third figure shown) is placed on top. On the other hand, Figures 15 and 21
As is clear from the figure, as the movable member 110 moves in the direction of arrow Y, the cam portion 14 formed on the movable member
6, the support member 140 including the small shaft 145 engaged therewith moves r3'9J approximately in the opposite direction of the arrow X,
A disc clamp is made.

Recording and playback are possible in this state.

When the operation signal to start recording or playback is issued,
The pickup body 7 begins to move and recording or reproduction begins. When recording, the pair of flat magnets 181 and 182 shown in FIG. The magnetization direction of the bias magnetic field applied to the magnetized film is switched.

When recording or reproduction is completed, the cartridge 77 and the disc 15 containing it are returned by following the process completely reverse to that described above. The cartridge 77 is projected out of the housing 78 and recovered by a projection means shown in FIG. 15, which includes a projection lever 147 and a coil spring 158 biasing the projection lever.

In addition, in this embodiment, as shown in FIG.
Although the bottle has a substantially cylindrical shape, the bottle may be formed into a conical shape as shown in FIG.

Effects of the Invention As detailed above, in the magneto-optical information recording apparatus according to the present invention, the magnetic field applying means applies a magnetic field in the direction opposite to the magnetization direction of the perpendicularly magnetized film of the recording medium (disk 15).
A pair of flat magnets (181, 182) extending parallel to each other along a moving path of a light emitting means that moves while emitting a light beam modulated by recorded information, and arranged so that the magnetic poles thereof are opposite to each other; A support mechanism (composed of an intermediate member 178, a slider 179, 180, etc.) that supports both magnets so as to be movable along the perpendicular magnetization film and in a direction substantially perpendicular to the direction in which the magnets extend, and an output shaft ( A pair of solenoid plungers (184, 185) are provided to protrude in opposite directions to each other and drive the support mechanism to move both of the magnets.
186°187).

In this way, by arranging flat magnets in parallel and moving them in parallel, the overall size of the magneto-optical information recording device can be reduced, especially in the direction perpendicular to the recording surface of the recording medium. In other words, it is easier to make the device thinner. Also, both magnets are moved by a pair of nod plungers,
With this configuration, both magnets can be moved at extremely high speed, and the magnets can easily follow the magnetization direction of the perpendicularly magnetized film, which changes every round of the track.

[Brief explanation of drawings]

FIG. 1 is a plan view of the recording/reproducing section of the magneto-optical information recording/reproducing apparatus according to the present invention, FIGS. 2 and 3 are sectional views taken along the line 1 and 11 of FIG. 1, and FIG. is a view taken along the line IV-IV in relation to FIG. 3, FIGS. 5 to 9 are partial detailed views of the recording and reproducing section, FIG. 10 is a schematic overall perspective view of the magneto-optical information recording and reproducing apparatus, and FIG. 11 FIGS. 14 to 13 are diagrams for explaining the disc storage cartridge, FIG. 14 is a plan view of the internal structure including the recording/reproducing section, and FIGS. 15 to 18 are xv-xv arrow views related to FIG. 14, respectively. , XVI-XVI arrow view, X■-X■ arrow view and X■-
The X-arrow view and FIGS. 19 to 24 are partially detailed views of the internal structure. Explanation of symbols of main parts 5.6...Support rail 7...Pickup body 8.9...Steel roller 13...Spring member 15... ... Disk 16 ... Longitudinal magnet 17.18 ... Longitudinal yoke 20 ... Longitudinal magnetic circuit 21 ... Drive coil 22 ...・Detection coil 25... Holding member 27... Laser diode 28... Collimator lens 29... Condensing lens 30... Light receiving element 31 ......Composite prism 32...Astigmatism element 34...Monitor light receiving element 43.44.45...7-shaped groove 48...
First prism 49...Second prism 50...Circular correction surface 51...Total reflection surface 52...Polarization reflection surface 58...Objective Lens 65...Flexible printed circuit board 66...Turntable 71...Rack section 72.116...Rack member 77...Cartridge 78... Housing 80... Slot 83... Body 84... Hole 87... Opening 88... Lid body 89.101.158...Coil spring 90
...Base part 91...Closing part 93.94...Support shaft 95.96, 123, 124 Old...Lever member 99.
100...Pin 103...Connection part 104.105...Four parts 106.107...Vertical chassis 109.110
...Moving member 117...Gear transmission mechanism 119...Motor 122...Shaft 131...Cartridge holder 137.138
,17L 172...Cam hole 140...
...Support member 143...Press member 144...Spring member 147...Protrusion lever 154.195.196...Detection switch 16
5...Plate spring 178...Intermediate member 179.180...Slider 181.182...Flat magnet 184.
185...Output shaft 186.187...Solenoid plunger 19
9...Magnetic shielding member good curtain 5 mains ro concave curtain 7 concave gable yt2 [] Q/tail/3 concave spring 14 concave 2152 calculation a/6 illustration book 27 U2 ゑ22U5

Claims (2)

[Claims] (1) Light that records information by applying a magnetic field in the opposite direction to a recording medium that includes a perpendicularly magnetized film that has been magnetized in a predetermined direction by means of a magnetic field applying means and emitting a light beam modulated by recorded information using a light emitting means. A magnetic information recording device,
The magnetic field applying means includes a pair of flat magnets extending parallel to the movement path of the light emitting means and arranged so that magnetic poles are opposite to each other, and a pair of flat magnets arranged along the perpendicularly magnetized film. a support mechanism supported movably in a direction substantially perpendicular to the direction of extension of both magnets; and a support mechanism provided with output shafts protruding in opposite directions to move the pair of magnets. A magneto-optical information recording device comprising a pair of driven solenoid plungers. (2) The magneto-optical information recording device according to claim 1, wherein the output shaft of the solenoid plunger protrudes while the recording medium rotates once.