JPH0319160A - Magneto-optical recording and reproducing device - Google Patents

Abstract

PURPOSE:To stabilize the relative position of a magnetic head and an optical head by providing a magnetic head moving means which elastically deforms a second elastic body through the use of displacement for the first direction of the optical head and moves the magnetic head in the second direction. CONSTITUTION:The optical head 2 is positioned at the back of a position fitted to the outermost periphery of the recording area of a magneto-optical disk 1 and a lever 17 freely rotates around a pin 16. Thus, a motion is converted into the clockwise one around the pin 16 against the energizing force of a moving spring 18 for the back of a connection member 12. Then, the contact point of a vertical rod 13 is raised upward and the vertical rod 13 is moved upward. The vertical rod 13 is brought into contact with the second elastic body 11, which is elastically deformed, and the magnetic head 4 fitted to a tip through a first elastic body 8 is positioned at the upper part of the internal part of the device, whereby collision with the cartridge 3 is avoided. Thus, the relative position of the magnetic head 4 and the optical head 2 can be stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magneto-optical recording and reproducing device used as an external storage device for electronic computers, a recording and reproducing device for music and video signals, and other information. BACKGROUND OF THE INVENTION In recent years, with the development of electronic computers and means of high-speed mass transmission of information, there has been a demand for low-cost, high-density, large-capacity, non-volatile storage devices with high-speed transfer capabilities, and magnetic disk devices are often used. However, there are problems such as low recording density, high price per unit of information, and especially in fixed magnetic disk drives, it is difficult to exchange the medium. Optical recording is currently in the spotlight as a technology that can solve these problems, and rewritable magneto-optical recording in particular has high expectations in many fields. In magneto-optical recording, overwriting using optical modulation is difficult, so overwriting using magnetic field modulation has been studied in recent years, and many reports have been made. The above method is an M4 recording method for fixed magnetic disks.
The magnetic field applied to the magneto-optical disk is modulated by a floating magnetic head, and the size of the recording bit is controlled by the convergence diameter of the converged laser beam. Hereinafter, a conventional magneto-optical recording/reproducing device will be explained with reference to the drawings.

FIGS. 2(a) to 2(C) show a conventional magneto-optical recording/reproducing device, in which (a) is a plan view thereof, and ω) and (C) are side views thereof in various states. Figure 2(a)-(
In C), l is a magneto-optical disk having spiral recording tracks, and the information recording surface is on the lower side of FIG. 2(b). Reference numeral 2 denotes an optical head, which is accessed in eight directions indicated by arrows, and has a built-in optical system for applying a focused laser beam for recording, reproduction, and erasing to the recording surface of the magneto-optical disk 1. The direction of the coordinate axes is shown in Figure 2 (a) - (
Set as shown in b). The X direction is parallel to the access direction of the optical head 2, with the right side in FIG. 2(b) being the positive direction. The y direction is perpendicular to the X axis and parallel to the magneto-optical disk l, with the upper side of FIG. 2(a) being the positive direction. 2
The direction is perpendicular to the magneto-optical disk l, with the upper side (in Fig. 2) being positive. For convenience, the positive direction of the Z-axis is upward,
The negative direction is called downward, the positive direction in the X-axis direction is called backward, and the negative direction is called forward. Reference numeral 4 denotes a magnetic field consisting of electromagnets for applying a perpendicular magnetic field necessary for recording and erasing information to the magneto-optical disk l, which is applied to the magneto-optical disk l by an optical hand 2 with the magneto-optical disk l in between. It is arranged at a position facing the converged laser beam, is connected to the optical head 2 via the temporary spring 24, the first connecting member 2I, and the second connecting member 22, and is moved in the access direction A along with the access operation of the optical head 2. Moving. The magnetic head 4 is shaped to generate lift in the positive direction of the Z-axis by an air flow having a relative velocity in the tangential direction of the recording track of the magneto-optical disk l. Also, the first
The connecting member 2l and the second connecting member 22 are connected to each other via a pin 23, and the first connecting member 2l can be rotated around the rotation axis of the pin 23 by a drive mechanism (not shown). It is. Reference numeral 5 denotes a turntable on which the magneto-optical disk 1 is mounted and for applying torque, and is connected to a spindle motor 6 for generating torque. Reference numeral 3 denotes a cartridge containing a magneto-optical disk 1, which has an access hole 3a for inserting an optical head 2, a magnetic head 4, and a turntable 5, and a moving mechanism (
(not shown) is moved to the turntable 5 after insertion,
It will be installed. The cartridge 3 has a member and mechanism for keeping the access hole 3a closed when the cartridge 3 is outside the magneto-optical recording/reproducing apparatus, but these are omitted here. Reference numeral 7 denotes a case surrounding the entire magneto-optical recording and reproducing apparatus, and an insertion opening 7a for inserting the cartridge 3 is provided on the left side of FIGS. 2(a) to 2(C). As mentioned above, tJIIIi. Regarding the magneto-optical recording and reproducing device,
The operation will be explained below. First, as shown in FIG. 2), the cartridge 3 containing the magneto-optical disk 1 is inserted through the insertion slot 7a and moves backward, so that the rotational center axis of the magneto-optical disk 1 and the rotational center axis of the turntable 5 are aligned. It comes to rest at a position that is approximately on the same straight line. At this time, the magnetic head 4 is located above the interior of the magneto-optical recording/reproducing apparatus due to the rotation of the leaf spring 24 and the first connecting member 2l around the pin 23.
Avoid collision with cartridge 3. Next, as shown in FIG. 2(C), the cartridge 3 moves downward, and the magneto-optical disk l is mounted on the turntable 5, and then comes to rest at a position where the built-in magneto-optical disk l does not come into contact with the inner wall of the cartridge 3. do.

At this time, the optical head 2 is inserted into the access hole 3a of the cartridge 3.
is inserted into the magneto-optical disk l, and is in a state where it can provide focused laser light to the magneto-optical disk l. In this state, spindle motor 6
applies torque around two axes to the magneto-optical disk 1 via the turntable 5, causing the magneto-optical disk 1 to rotate at a predetermined number of rotations.

Thereafter, as shown in FIG. 2(C), the first connecting member 2l
rotates counterclockwise around the pin 23 with respect to the second connecting member 22 in FIG. is inserted and approaches the magneto-optical disk l. At this time, since the magneto-optical disk l is rotating, the air layer near the surface of the magneto-optical disk l sticks to the surface of the magneto-optical disk 1 due to viscosity, and the magnetic head 4 is directed to the recording track of the magneto-optical disk l. The airflow has a relative velocity in the tangential direction of . That is, when the magnetic head 4 approaches the magneto-optical disk l sufficiently, the magnetic head 4 obtains a lifting force in the direction away from the magneto-optical disk l. On the other hand, the leaf spring 24 applies a pressing force in a direction to bring the magnetic head 4 closer to the magneto-optical disk l. The magnetic head 4 is positioned relative to the magneto-optical disk l at a position where the lifting force and the pressing force are balanced. By using an appropriate shape and appropriate material for the temporary spring 24, the magnetic head 4 can record without coming into contact with the magneto-optical disk 1.
It is possible to maintain close proximity to the position necessary to apply the erasing magnetic field. When recording information, the magnetic head 4 applies a magnetic field modulated according to the information to the magneto-optical disk l, and at the same time, the optical head 2 irradiates the magneto-optical disk l with unmodulated focused laser light to generate heat. Perform magnetic recording.
During erasing, the magnetic head 4 applies an unmodulated magnetic field in a direction defined as the erasing direction, and the optical head 2 irradiates the magneto-optical disk l with unmodulated focused laser light to erase information. The magnetic head 4 includes a leaf spring 24, a first connecting member 21, and a second connecting member 21.
Because the magnetic head 4 is connected to the optical head 2 through the connecting member 22, even if the optical head 2 is located at any position in the eight directions of the arrows, the magnetic head 4 is always at the position where the focused laser beam is irradiated. A magnetic field for recording and erasing can be applied to the Problems to be Solved by the Invention However, with the above-mentioned precepts, the following problems arose. The area in which the magnetic head 4 can apply a magnetic field sufficient for recording and erasing is extremely narrow in each of the x, y, and z directions. As in the conventional example shown in FIG. 2, when the cartridge 3 is inserted, the magnetic head 4 moves upward via mechanisms such as the leaf spring 24, the first connecting portion 21, the second connecting portion 22, and the bottle 23. However, in the structure that avoids collision with the cartridge cartridge 3, the relative positional relationship between the magnetic head 4 and the optical head 2 is easily changed due to the acceleration caused by the access operation of the optical head 2 or other mechanical disturbances due to the minute clearances of each part of the mechanism system. Change.
Therefore, when the alignment of the magnetic head 4 changes in the x and y directions, the relative deviation between the alignment of the magnetic head 4 to which the magnetic field is applied and the position on the magneto-optical disk to which the optical head 2 applies the focused laser beam is In some cases, sufficient magnetic field was not applied for recording and erasing, resulting in unstable operation. Even with fluctuations in two directions, the magnetic head 4
If the magnetic head moves away from the magneto-optical disk l, the magnetic field will be insufficient, and if it approaches the magneto-optical disk l, the magnetic head will collide with the magneto-optical disk l, causing damage to the magnetic head 4, vibration and fatigue of the leaf spring 24, damage to the magneto-optical disk l, data destruction, etc. was occurring. Furthermore, in order to maintain the relative position of the magnetic head 4 and the optical head 2 with sufficient accuracy, it is necessary to increase the precision of the combination of the first connecting member 21, the second connecting member 22, and the pin 23. was a contributing factor to the cost increase. Furthermore, since the movable part that performs access includes a mechanical system, the mass of the movable part increases and the access time becomes longer. The present invention is described above! In view of the problem, magneto-optical recording has a structure in which the access movable part does not include a special rotation mechanism or translation mechanism to avoid the magnetic head 4 from the cartridge 3, and the relative position of the magnetic head 4 and the optical head 2 is stable. It provides a playback device. Means for Solving the Problems In order to achieve this object, the magneto-optical recording and reproducing apparatus of the present invention comprises a magneto-optical disk, an optical head that provides a light spot for recording, reproducing and erasing on the magneto-optical disk, and a magneto-optical disk. It is placed in a position facing the optical head, and receives a positive force from the air flow generated by the rotation of the magneto-optical disk to maintain a substantially constant distance from the magneto-optical disk while applying a magnetic field for recording and erasing on the magneto-optical disk. a first elastic body with the magnetic head attached to the end thereof;
The second elastic body connected to the elastic body of The magnetic head is equipped with a means for moving the magnetic head to approach the magneto-optical disk and separate it from the magneto-optical disk. Effect: This structure greatly reduces fluctuations caused by mechanical disturbances in the relative position of the magnetic head and optical head due to the intervention of the mechanical system that conventional optical heads have, thereby stabilizing recording and erasing operations and making access possible. Access time can be shortened because the mass of the moving parts is reduced. Example Below, regarding a magneto-optical recording and reproducing device according to an example of the present invention,
This will be explained with reference to the drawings. FIGS. 1(a) to 1(C) are diagrams showing a magneto-optical recording/reproducing apparatus according to an embodiment of the present invention. FIG. 1(a) is a plan view thereof, and (b). (C) is a side view showing various states. Figure 1(a)
~(C), 1 is a magneto-optical disk, 2 is an optical head, 3
1 is a cartridge, 4 is a magnetic hand, 5 is a turntable, 6 is a spindle motor, and 7 is a case, which are the same as the conventional example, including the mechanism for moving the cartridge 3.
Further, the first elastic body 8 has a different shape from the conventional plate spring 24, but performs the same function. Also, the direction of the zano axis is shown in Figure 1 (
As shown in a) and (b), it is the same as the conventional example. Reference numeral 12 denotes a connecting member for maintaining the relative positions of the optical head 2 and the magnetic head 4, and corresponds to a structure in which the first connecting member 21 and the second connecting member 22 of the conventional example are integrated. Reference numeral 1l denotes a second elastic body whose both ends are connected to the first elastic body 8 and the connecting member l2, and elastic deformation causes the magnetic head 4 to move in approximately two axial directions.

Further, the second elastic body 1l has a structure in which the spring constant is sufficiently larger than that of the first elastic body 8. 13 to 18 are members constituting a magnetic head moving means that deforms the second elastic body l1 by converting the displacement of the optical head 2 in the x-axis direction into a displacement in the y-axis direction, The rod is L-shaped and consists of a prismatic part extending in the Z-axis direction and a cylindrical part extending in the Y-axis direction, and the prismatic part of the upper and lower rods 13 is a prismatic part with a square hole. Rod holder l which is a member of
4, and the upper and lower rods l3 are inserted into the ronod holder 1.
4 is slidable in the Z-axis direction. 17 is an L-shaped lever that is rotatable around a pin l6 centered in the y-axis direction, and one end is attached to the upper and lower rods 13. The protrusion 17 contacts the lower end, and the other end contacts at least the optical nozzle 2 at a position on the outer periphery of the recording area.
Lever holder 15, whose part a contacts connecting member l2, is fixed to case 7 or a part that does not move relative to case 7, and maintains the relative positions of rod holder l4 and pin 16 with respect to case 7, and rotates the upper and lower rods. The direction of movement of l3 and lever l7 is restricted via iron holder l4 and pin 1G. Further, a spring 18 is provided between the lever holder l5 and the lever l7 (not shown in FIG. 1(a)) for applying a counterclockwise rotation force to the lever l7. Regarding the magneto-optical recording and reproducing device configured as described above,
The operation will be explained below. First, as shown in FIG. Stop at a position on the same straight line. At this time, the optical head 2 is located behind the position corresponding to the outermost circumference of the recording area of the magneto-optical disk 1, and the connecting member 12 contacts the protrusion 17a of the lever 17 and pushes the lever l7 backward. ．． Since the lever 17 is rotatable around the pin 16, it converts the backward movement of the connecting member l2 into a clockwise movement around the pin 16 against the biasing force of the spring 18, and moves the upper and lower ronds l3. The contact point is raised upwards, and the vertical dowel l3 is moved upwards. The upper and lower openings and doors 13 are the second elastic bodies 11
The second elastic body 11 is elastically deformed upon contact with the cartridge 3, and the magnetic head 4 attached to the tip via the first elastic body 8 is positioned above the inside of the magneto-optical recording/reproducing device, and collides with the cartridge 3. Avoid.

Next, as shown in FIG. 1(C), the cartridge 3 moves downward so that the magneto-optical disk 1 is mounted on the turntable 5, so that the built-in magneto-optical disk 1 does not come into contact with the inner wall of the cartridge 3. Stop in position. At this time, optical head 2
is inserted into the access hole of the cartridge 3, and becomes ready to apply a focused laser beam to the magneto-optical disk 1.
In this state, the spindle motor 6 applies torque around two axes to the magneto-optical disk 1 via the turntable 5, causing the magneto-optical disk 1 to rotate at a predetermined number of rotations. Thereafter, as the optical head 2 moves forward, the contact part 17a separates from the connection part 12, and the lever l7 is rotated counterclockwise by the spring l8, and the upper and lower rods l3 that are in contact with the front end of the lever 17 are rotated counterclockwise by the spring l8.
slides down the rond holder 14 and separates from the second elastic body 11, and the magnetic hend 4 descends onto the magneto-optical disk, and receives the lift force due to the air flow generated by the rotation of the magneto-optical disk 1 and the first elastic body. It is located against the magneto-optical disk 1 at a position where the pressing forces of the body 8 are balanced. Record of information. The operation related to erasing is the same as in the first embodiment, so it will be omitted. After that, as the optical head 2 moves forward, the support rod lO
and the second elastic body l1 are separated, and the magnetic head 4 descends onto the magneto-optical disk, reaching a position where the lift force due to the air flow generated by the rotation of the magneto-optical disk l and the pressing force of the first elastic body 8 are balanced. Located relative to the magneto-optical disk l. When recording information, the magnetic head 4 applies a magnetic field modulated according to the information to the magneto-optical disk l, and at the same time, the optical head 2 applies an unmodulated focused laser beam to the magneto-optical disk l.
irradiated to perform thermomagnetic recording. During erasing, the magnetic head 4 applies an unmodulated magnetic field in a direction defined as the erasing direction,
The optical head 2 irradiates the magneto-optical disk 1 with unmodulated converged laser light to erase information.

Since the magnetic head 4 is connected to the optical head 2 via the first elastic body 8, the second elastic body 1l, and the connecting member 12, even if the optical head 2 is located at any position in the eight directions of the arrows, The magnetic head 4 can always apply a magnetic field for recording and erasing to the position irradiated with the focused laser beam. Also,
Since the second elastic body 1l has a relatively large spring constant compared to the first elastic body 8, the second elastic body can be considered to be almost rigid after the magnetic head 4 has descended to the magneto-optical disk 1. The lift characteristics of the magnetic hand 4 are improved compared to the conventional example. There is no deterioration in vibration characteristics. As described above, according to this embodiment, since there is no mechanism in the connecting member 12, the relative positional relationship between the magnetic head 4 and the optical head 2 is maintained even if the optical head 2 is subjected to acceleration due to an access operation or disturbance. It does not change. Furthermore, compared to the conventional example, since there is no mechanism in the movable part that performs the access operation, 'Iff' of the movable part is reduced, and access time can be shortened. Further, since a drive mechanism for the rotating portion as in the conventional example is not required, the space factor of the device is improved and miniaturization is facilitated.

Effects of the Invention The present invention includes a magneto-optical disk, an optical head which provides an optical head for recording, reproducing and erasing on the magneto-optical disk, and a magneto-optical disk which is disposed at a position facing an optical head with the magneto-optical disk in between, and which rotates the magneto-optical disk. A magnetic head which applies a magnetic field for recording and erasing to the magneto-optical disk while maintaining a substantially constant distance from the magneto-optical disk by obtaining lift from the air flow generated by the magneto-optical disk, and a magnetic hend attached to one end. A first elastic body that generates a pressing force that balances the lift force of By providing a 6R head moving means that avoids the magnetic head at the start of loading the cartridge and approaches the magneto-optical disk when loading is completed, the relative position of the magnetic head and the optical head can be changed. Recorded because fluctuations due to mechanical disturbances are significantly reduced. The stable erasing operation expands the range of applications, and since the mass of the movable part that performs access is reduced, the optical hand can be moved at higher speeds, reducing access time. In addition, the possibility of accidents such as the collision of the R air head with the magneto-optical disk is reduced,
Improves data reliability and equipment life. And the machine tlI
! Cost reduction can be expected by reducing the structure. In addition, by using the movement of the optical head as a means for the magnetic hand to approach the magneto-optical disk, it is possible to realize a magneto-optical recording and reproducing device that can achieve a number of excellent effects such as a compact loading mechanism. ．．

[Brief explanation of the drawing]

FIG. 1(a) is a plan view of a magneto-optical recording/reproducing apparatus according to an embodiment of the present invention, FIGS. 1(b) and (C) are side views of a magneto-optical recording/reproducing apparatus according to an embodiment of the present invention, Figure 2 (
FIG. 2A is a plan view of a conventional magneto-optical recording and reproducing apparatus, and FIGS. 2B and 2C are side views of the conventional magneto-optical recording and reproducing apparatus.

Claims (6)

[Claims] (1) A magneto-optical disk having concentric or spiral recording tracks, and an optical head that provides a light spot for recording, reproducing and erasing onto the magneto-optical disk and is movable in a direction across the recording tracks of the magneto-optical disk. is placed in a position facing the optical head with the magneto-optical disk in between, and obtains lift from the air flow generated by the rotation of the magneto-optical disk, and maintains a substantially constant distance from the magneto-optical disk while directing the optical head. a magnetic head that applies a magnetic field for recording and erasing to a magnetic disk; and a first magnetic head that is attached to one end and that elastically deforms when the magnetic head approaches the magneto-optical disk to generate a force that balances the lift force. a second elastic body connected to the first elastic body; a turntable that applies rotational torque to the magneto-optical disk; The direction in which the magnetic head leaves the magneto-optical disk in a direction substantially perpendicular to the magneto-optical disk is defined as a second direction, and the displacement of the optical head in the first direction is used to increase the second elasticity. A magneto-optical recording and reproducing apparatus, comprising: a magnetic head moving means for moving the magnetic head in the second direction by elastically deforming the body. (2) The magnetic head moving device has at least a displacement converting means for converting a mechanical displacement in a first direction into a mechanical displacement in a second direction, and the displacement converting means includes a part of the optical head or a part of the optical head. a first contact area in contact with a first contacted area made of a part of a member rigidly fixed to the optical head; and a part of the second elastic body or rigidly fixed to the second elastic body. a second contact area that contacts a second contacted area made of a part of a member that has been touched, and when the first contact area does not contact the first contacted area the contact area does not contact the second contacted area,
When the optical head is located at least at the outermost periphery of the recording area of the magneto-optical disk, the first contact area contacts the first contacted area, and the first contact area the second elastic body is displaced in the first direction, and the second contact area is displaced in the second direction and comes into contact with the second contacted area, thereby separating the second elastic body from the magneto-optical disk. When the optical head is located from the outermost periphery of the recording area of the magneto-optical disk to the inner periphery including the outermost periphery, the first contact area is By separating from the contact area, the second contact area moves in a direction opposite to the second direction and separates from the second contacted area, causing the magnetic head to approach the magneto-optical disk. A magneto-optical recording/reproducing device characterized in that the second elastic body is elastically deformed in a direction. (3) The magneto-optical recording and reproducing apparatus according to claim (1), wherein the second elastic body has a larger spring constant than the first elastic body. (4) The magneto-optical recording/reproducing apparatus according to claim 1, wherein at least a portion of the second elastic body does not move relative to the optical head. (5) The second elastic body has a shape such that no external force is applied to the second elastic body when the magnetic head moving means moves the magnetic head close to the magneto-optical disk. The magneto-optical recording and reproducing apparatus according to claim (1). (6) The displacement converting means is a rotary member that is substantially perpendicular to a plane including the first direction and the second direction and that is rigidly fixed in a state where it does not move relative to the external case of the magneto-optical recording/reproducing device. a first member rotatable about an axis; and at least the second member.
a pipe-shaped guide member having a guide hole parallel to the direction of the magneto-optical recording/reproducing device and rigidly fixed in a state where it does not move relative to the external case of the magneto-optical recording/reproducing device; a second member that is inserted into the guide hole and is movable in a direction parallel to the second direction according to the guide hole, and the first member has a first contact area and a rotation axis at one end. There is a first intermediate contact area on the other end of which the second member contacts, and the second member has a second intermediate contact area.
There is a second intermediate contact area where the first member contacts the contact area of load application means for applying a load in a direction to substantially press the second intermediate contact area by the body onto the first intermediate contact area, and the first contact area of the first member is displaced. By doing so, the first member rotates around the rotation axis, and the first intermediate contact area
Claim 2, characterized in that the second contact area is displaced in the second direction by displacing the second member in the second direction via an intermediate contact area of
) magneto-optical recording and reproducing device.