JPH08297938A - Lamp loading device and disk device - Google Patents

Abstract

PURPOSE: To reduce the peak of the natural vibration of a beam by improving the rigidity of the beam by fixing a beam section which is brought into contact with a lamp to the front end section of a rotary actuator at both ends through connecting sections. CONSTITUTION: A lamp 25 is constituted so that its lower edge can become lower and upper edge can become higher and a beam section 26 is held in such a state that both ends of the section 26 are fixed to an elastic member 24b through connecting sections 26a and 26b. When a disk device 20 constituted in such a way turns toward a stopping position, a head slider 24 is separated from the surface of a magnetic disk 23, because the beam section 26 of a rotary actuator 24 slides on the slope of the lamp 25 after running on the slope. When the actuator 24 reaches a stopping position, the beam section 26 moves to the higher level of the slop of the lamp 25 and the head slider 24 is held in the air. Thereafter, a spindle motor 22 stops. Since the beam section 26 is formed in the shape of a beam, the displacement of the section 26 is remarkably reduced when disturbance is applied to the section 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mass storage device for an information processing device, and more particularly to a rotary disk type storage device such as a magnetic disk or an optical disk.

[0002]

2. Description of the Related Art Conventionally, a magnetic disk device is shown in FIG.
It is configured as shown in FIG. In FIG. 25, the magnetic disk device 1 includes a housing 2, a spindle motor 3,
It includes a magnetic disk 4 which is rotationally driven by the spindle motor 3 and a rotary actuator 5.

Further, the rotary actuator 5 has a flying head slider 5a, an elastic member 5b for supporting the head slider 5a, an arm 5c for supporting the elastic member 5b, and one end of the arm 5c. It includes a vertical shaft 5d that supports it and a motor 5e that rotates the arm 5c around the vertical shaft 5d.

As shown in the partial side view 26 and the partial plan view 27, the head slider 5a is attached to the lower surface of the tip of the elastic member 5b and is pressed by the elastic member 5b against the surface of the rotating magnetic disk 4. As a result, the air flow flowing between the lower surface of the head slider 5a and the surface of the magnetic disk 4 causes the surface of the magnetic disk 4 to float at a slight distance.

When a driving voltage is externally supplied to the voice coil 5f, the arm 5c rotates around the vertical axis 5d based on the force generated by the magnetic field of the magnet 5g and the current flowing through the voice coil 5f. Be moved. As a result, the head slider 5a attached to the other end of the arm 5c is moved substantially in the radial direction of the magnetic disk 4, as shown by the arrow C2 in FIG. Thus,
The magnetic head 6 included in the slider 5 a seeks the magnetic disk 4. As a result, the magnetic head 6 attached to the head slider 5a is
Records and reproduces information on and from a predetermined track on the magnetic disk 4.

In the magnetic disk device 1 having such a structure, the spindle motor 3 is started up at the time of startup with the head slider 5a being in contact with the innermost circumference of the magnetic disk 4. Therefore, at the time of startup, the head slider 5
After moving while rubbing the surface of the magnetic disk 4 first, “a” is levitated from the surface of the magnetic disk 4. Similarly, when the magnetic disk 4 is stopped, the head slider 5a contacts the innermost circumference of the magnetic disk 4.

Therefore, such a magnetic disk drive 1
Is CSS (Contact Start Stop)
Although called a method, there is a problem that the surface of the magnetic disk 4 may be damaged because the head slider 5a comes into contact with the surface of the magnetic disk 4 at the time of starting and stopping.

Therefore, in recent years, at the time of starting and stopping,
A magnetic disk device is used in which the head slider 5a is supported while being separated from the surface of the magnetic disk 4. Such a magnetic disk device is configured, for example, as shown in FIG. In FIG. 28, the magnetic disk device 7 includes a housing 2, a spindle motor 3, a magnetic disk 4, and a rotary actuator 5,
It has the same configuration as the magnetic disk device 1 of FIG. The magnetic disk device 7 is further provided with a lamp 8 on the housing 2, and near the tip of the rotary actuator 5,
It has a hemispherical convex portion 9.

The hemispherical convex portion 9 is provided on the lower surface of the tip portion of a cantilever-shaped extension portion 9a made of metal, for example, which is attached so as to project from the tip of the elastic member 5b of the rotary actuator 5. It is equipped.

According to the magnetic disk device 7 having such a structure, when the rotary actuator 5 is not used, as shown in FIG.
At the stop position shown in FIG. 8, the convex portion 9 rests on the outer surface of the magnetic disk 4 and rests on the upper surface of the ramp 8. As a result, the head slider 5a of the rotary actuator 5 is separated from the surface of the magnetic disk 4,
It will be held in the air.

When starting from this state, the spindle motor 3 first rises and reaches a predetermined number of revolutions, and then the rotary actuator 5 moves in the direction C3 in FIG. At this time, the rotary actuator 5 rotates while the convex portion 9 slides along the slope of the lamp 8. Then, the convex portion 9 separates from the ramp 8 and the head slider 5a is pressed against the surface of the magnetic disk 4 based on the elasticity of the elastic member 5b. However, between the head slider 5a and the surface of the magnetic disk 4. Due to the levitation force acting on the head slider 5a by the air flow, the head slider 5a floats without contacting the surface of the magnetic disk 4 (the above operation is called loading, and the head slider 5a causes the magnetic disk 4 to move). Floating on the surface of the) is called landing).

Further, when stopped, the rotary actuator 5 rotates toward the stop position shown in FIG. At this time, the convex portion 9 of the rotary actuator 5 rides on the slope of the ramp 8 and slides along the slope,
The head slider 5a separates from the surface of the magnetic disk 4. When the rotary actuator 5 reaches the stop position, the convex portion 9 moves to the higher side of the slope of the ramp 8 so that the head slider 5a is separated from the surface of the magnetic disk 4 and is held in the air. (The above operation is called unload). Then, the spindle motor 3 is stopped.

In this case, since the extension 9a is formed in the shape of a cantilever, as shown in FIG. 31, when the load W is applied to the whole, the amount of deflection v at the free end is When the length of the extension portion 9a is L, the longitudinal elastic modulus is E, and the second moment of area is I,

[Equation 1] Becomes

Thus, the head slider 5a of the rotary actuator 5 has the magnetic disk 4 when starting and stopping.
Since it does not contact the surface of N-CSS (Non
It is called the CSS) method or the dynamic load-unload method.

By the way, when such a dynamic load-unload system is adopted, the magnetic head 6 is in a state where the rotary actuator 5 is retracted to the stop position.
The magnetic disk 4 and the magnetic disk 4 are not physically bound to each other.
Therefore, the magnetic disk 4 can be taken out without damaging the magnetic head 6 or the magnetic disk 4.
Utilizing this, a so-called cartridge type magnetic disk device is known in which the magnetic disk 4 is made into a cartridge so as to be detachable.

Such a cartridge type magnetic disk device is constructed, for example, as shown in FIG. FIG.
2, the cartridge type magnetic disk device 10 is
Case 2, spindle motor 3, rotary actuator 5
The main body 11 in which the lamp 8 is incorporated, and the main body 1
1 and a cartridge 12 that is attachable to and detachable from the cartridge mounting portion 11a provided in the first embodiment.

The cartridge 12 houses the magnetic disk 4 therein, and when it is inserted into the cartridge mounting portion 11a of the main body 11, the rotary actuator 5 is provided.
The head slider 5a has an opening (not shown) so that the head slider 5a can approach the magnetic disk 4.

According to the cartridge type magnetic disk device 10 having such a structure, the cartridge 12 is inserted into the cartridge mounting portion 11a of the main body 11 as shown by an arrow A in FIG. The magnetic disk 4 is mechanically chucked with respect to the spindle motor 3.

The magnetic disk 4 chucked by the spindle motor 3 in this way is
Is driven to rotate by the rotary actuator 5
Is rotated, the head slider 5a provided near the tip thereof is moved to a predetermined track on the magnetic disk 4, and the magnetic head 6 records and reproduces an information signal on the track.

Also in this case, the rotary actuator 5 is
When in the stop position, the convex portion 9 of the cantilever-shaped extension portion 9a provided at the tip end of the extension portion 9a rides on the ramp 8 to be held in the air.

[0021]

However, in the magnetic disk devices 7 and 10 configured as described above,
In either case, the metal extension 9a is constructed as a cantilever. Therefore, since its rigidity is relatively low, natural vibration having a large peak is likely to occur. Further, since the extension portion 9a is arranged near the head slider 5a of the rotary actuator 5, the natural vibration of the extension portion 9a is easily transmitted to the head slider 5a. Therefore, the natural vibration of the extension portion 9a is transmitted to the head slider 5a, thereby affecting the positioning of the magnetic head 6 attached to the head slider 5a with respect to the magnetic disk 4. Thus, the magnetic head 6 cannot be accurately positioned with respect to a predetermined track on the magnetic disk 4. Further, there is a problem that it is difficult to increase the recording density and the capacity of the magnetic disk.

In view of the above points, the present invention provides a ramp loading device and a disc device in which the natural vibration of the member for holding the rotary actuator on the ramp at the stop position is suppressed. Is intended.

[0023]

According to the present invention, the above object is provided with a magnetic head which is swingably supported with respect to a disk which is a rotationally driven recording medium and which has a tip for recording and reproducing the disk. In a lamp loading device provided with a ramp for supporting the rotary actuator in a state of being lifted upward when the rotary actuator is retracted to the outside of the disk, a beam provided at a tip end portion of the rotary actuator. And a lamp arranged so as to project between the beam portion and the upper surface of the rotary actuator.

[0024]

According to the above structure, since the beam portion to be brought into contact with the lamp is fixed to the tip end portion of the rotary actuator at both ends, preferably via the connecting portion, this beam portion is It will be configured as a cantilever. Therefore, since the rigidity of the beam is improved, the peak of its natural vibration is reduced.

When the connecting portion is formed integrally with the beam portion and / or the rotary actuator, the number of parts can be reduced, and the parts cost and the assembly cost can be reduced.

When the beam portion is provided with a hemispherical convex portion to be brought into contact with the lamp in the portion facing the rotary actuator, when the rotary actuator rotates to the stop position. In addition, the convex actuator rides on the ramp and slides, so that the rotary actuator is smoothly moved to the stop position.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. In addition, since the Examples described below are preferred specific examples of the present invention, various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

1 and 2 show a first embodiment of a magnetic disk device according to the present invention. In FIG. 1, a magnetic disk device 20 includes a housing 21, a spindle motor 22, a magnetic disk 23 rotatably driven by the spindle motor 22, and a rotary actuator 24.
And a beam portion 26 provided on the tip portion of the rotary actuator 24.

The housing 21 is formed substantially flat, for example, of aluminum alloy, and the spindle motor 22 is disposed on the flat surface portion. The spindle motor 22 is configured as, for example, a flat brushless motor, and is driven and controlled so that the angular velocity is constant, so that the magnetic disk 23 is rotated in the B direction.

Further, the rotary actuator 24 includes a flying head slider 24a and the head slider 2a.
4a for supporting the elastic member 4a, and this elastic member 24b
An arm 24c for supporting the arm 24c, a vertical shaft 24d for rotatably supporting one end of the arm 24c, and a motor 24e for rotating the arm 24c around the vertical shaft 24d.

As shown in FIG. 2, the head slider 24a is attached to the lower surface of the tip of the elastic member 24b.
The elastic member 24 is attached to the surface of the rotating magnetic disk 23.
By being pressed by b, the head slider 2
The air flow that flows between the lower surface of 4a and the surface of the magnetic disk 23 causes the surface of the magnetic disk 23 to float at a slight distance.

The elastic member 24b is made of an elastic material, is fixed to the tip of the arm 24c, acts as a spring based on its elasticity, and acts as a head slider 24a.
Is pressed against the surface of the magnetic disk 23 with a predetermined load.

The arm 24c is made of a rigid material, and is rotated about the vertical axis 24d to move the head slider 24a in the radial direction C2 of the magnetic disk 23 to perform a seek operation. As a result, the magnetic head 27 attached to the head slider 24a can access a predetermined track on the magnetic disk 23.

The motor 24e comprises a voice coil 24f attached to the other end of the arm 24c and a magnet 24g fixedly arranged on the housing 21. The polarities of the winding of the voice coil 24f and the magnet 24g are arranged such that the voice coil 24f is driven in the direction of the arrow C1 when a driving voltage is externally supplied to the voice coil 24f.

Therefore, when a driving voltage is externally supplied to the voice coil 24f, the arm 24c rotates around the vertical axis 24d based on the force generated by the magnetic field of the magnet and the current flowing through the voice coil 24f. Be moved. As a result, the head slider 24a attached to the other end of the arm 24c is moved substantially in the radial direction of the magnetic disk 23, as indicated by the arrow C2 in FIG. Thus, the magnetic head 27 provided on the slider 24a makes a seek operation with respect to the magnetic disk 23. As a result, the magnetic head 27 records / reproduces information on / from a predetermined track on the magnetic disk 23.

The lamp 25 is fixedly arranged so as to project toward the inner side in the radial direction of the magnetic disk 23 in a state of being floated up with respect to the housing 21, and when the rotary actuator 24 is rotated, Along the trajectory of the beam portion 26 attached above the tip of the rotary actuator 24, the slope 25a is slanted, and in the illustrated case, the lower edge is low and the upper edge is high. Formed (see FIG. 3).

As shown in FIG. 2, the beam portion 26 is formed in a thin round bar shape, and is attached to the elastic member 24b of the rotary actuator 24 so as to extend in the longitudinal direction thereof. In the case of the beam portion 26, both ends of the beam portion 26 are fixedly held by the elastic member 24b through the connecting portions 26a and 26b formed separately, so that the beam portion 26 is upwardly moved by a predetermined distance from the surface of the elastic member 24b. It is located in the position. Therefore, the beam portion 26 is configured as a doubly supported beam. In this case, the connecting portions 26a and 26b
Is fixed to the elastic member 24b and the beam portion 26 by adhesion, welding or the like.

The disk device 20 according to this embodiment is configured as described above and operates as follows. When not in use, the rotary actuator 24 is retracted to the outside of the magnetic disk 23 at the stop position shown in FIG. 1, and the beam portion 26 thereof rests on the upper surface of the ramp 25. As a result, the head slider 24a of the rotary actuator 24 is moved to the magnetic disk 2 as shown in FIG.
It will be separated from the surface of No. 3 and held in the air.

When starting from this state, after the spindle motor 22 starts up and reaches a predetermined rotation speed,
The rotary actuator 24 rotates inward. On this occasion,
As shown in FIG. 4, the rotary actuator 24 rotates while its beam portion 26 slides along the slope 25a of the ramp 25 in the direction of arrow C3. Then, the beam portion 26 separates from the ramp 25, and the head slider 24a is pressed against the surface of the magnetic disk 23 by the elasticity of the elastic member 24b.
The head slider 24a floats without contacting the surface of the magnetic disk 23 due to the levitation force acting on the head slider 24a by the air flow between the magnetic head and the surface of the magnetic disk 23. As a result, the head slider 24
The magnetic head 27 provided in a is moved relative to the magnetic disk 23 by the rotation of the rotary actuator 24.
At, seek operation is performed in the direction of arrow C2. As a result, the magnetic head 27 records / reproduces information on / from a predetermined track on the magnetic disk 23. In this case, the rotation of the rotary actuator 24 causes the head slider 2 to move.
4a is the innermost position Di to the outermost position Do shown in FIG.
Move up to.

When stopped, the rotary actuator 24 rotates toward the stop position shown in FIG. At this time, the beam portion 26 of the rotary actuator 24 is attached to the ramp 25.
The head slider 24a moves away from the surface of the magnetic disk 23 by riding on the slope of the magnetic disk and sliding along the slope. Then, when the rotary actuator 24 reaches the stop position, the beam portion 26 moves to the higher side of the slope of the ramp 25, so that the head slider 24a moves.
The magnetic disk 23 is separated from the surface and is held in the air. Then, the spindle motor 22 is stopped.

In this case, since the beam portion 26 is formed in a doubly supported beam shape, as shown in FIG. 6, when a load W is applied to the entire beam portion, the amount of deflection v at the central portion thereof is increased.
Where L is the length of the beam portion 26, E is the longitudinal elastic modulus, and I is the second moment of area,

[Equation 2] Becomes Therefore, as compared with the case of the cantilevered extension portion 9a of FIG. 25, since the amount of deflection v is 1/48, the amount of displacement when a force due to disturbance is applied is significantly reduced. Further, since the shearing force applied to the both-supported beam is 1/2 compared with the case of the cantilever, the bending moment applied to the both-supported beam is 1/6 compared to the cantilever. Thus, the both-end supported beam portion 26 has a significantly improved rigidity and can be reduced in weight.

FIG. 7 shows a disk device 2 according to the above embodiment.
The 1st modification of the beam part of 0 is shown. In FIG.
Similarly, the beam portion 28 is formed in a round bar shape, and is attached to the elastic member 24b of the rotary actuator 24 so as to extend in the longitudinal direction thereof.

In this case, the beam portion 28 has the connecting portions 28a, 2
Although fixedly held by the elastic member 24b via 8b, the connecting portions 28a, 28b are integrally formed with the elastic member 24b by a rising piece cut and raised from the elastic member 24b as shown in the figure. There is. The connecting portion 28a,
28b is formed at the same time by press molding or the like when manufacturing the elastic member 24b. As a result, the connecting portion 28
Since it is not necessary to separately manufacture a and 28b and attach them to the elastic member 24b, component cost and assembly cost are reduced.

FIGS. 8 and 9 show a second modification of the beam portion of the disk device 20 according to the above embodiment. In FIG. 8, the beam portion 29 is made of a plate material and is attached to the elastic member 24b of the rotary actuator 24 so as to extend in the longitudinal direction thereof.

In this case, the beam portion 29 is connected to the connecting portions 29a, 2a.
Although fixedly held by the elastic member 24b via 9b, the connecting portions 29a and 29b are integrally formed with the beam portion 29 by bending both ends of the beam portion 29 as shown in FIG. Has been done. The beam portion 29 is provided with a hemispherical convex portion 29c on the lower surface of the center thereof.
Only the tip of the convex portion 29c abuts the surface of the lamp 25 when riding on the vehicle 5. Thereby, the beam portion 2
Since the beam 9 does not directly contact the surface of the lamp 25, the beam 2
It is possible to prevent the edge 9 from being caught by the lamp 25, generating cutting chips, and increasing friction. As a result, the connecting portions 29a and 29b are manufactured separately, and the beam portion 29 is manufactured.
Since it does not need to be attached to the parts, the parts cost and the assembly cost are reduced.

10 and 11 show a second modification of the beam portion of the disk device 20 according to the above embodiment. In FIG. 10, the beam portion 29 is formed of a plate material,
For the elastic member 24b of the rotary actuator 24,
It is attached so as to extend in the longitudinal direction.

In this case, the beam portion 29 includes the connecting portions 29d, 2
Although fixedly held by the elastic member 24b via 9e, the connecting portions 29d and 29e are formed by punching the elastic member 24b as shown in FIG.
4b and the beam portion 29 are integrally formed. The beam 2
9 has a hemispherical convex portion 29c on its central lower surface, and when the beam portion 29 rides on the lamp 25, only the tip of the convex portion 29c abuts the surface of the lamp 25. As a result, the beam portion 29 does not directly contact the surface of the ramp 25, so that the edge of the beam portion 29 is prevented from being caught by the ramp 25, generation of cutting chips, and increase in friction. As a result, it is not necessary to manufacture the connecting portions 29a and 29b separately and attach them to the elastic member 24b and the beam portion 29, so that the component cost and the assembly cost are reduced.

12 and 13 show a second embodiment of the magnetic disk device according to the present invention. In FIG. 12, a magnetic disk device 30 includes a housing 21, a spindle motor 22, a magnetic disk 23 rotatably driven by the spindle motor 22, a rotary actuator 24, a ramp 31, and a rotary actuator 24. And a beam portion 32 provided at the tip portion of the. here,
The case 21, the spindle motor 22, the magnetic disk 23, and the rotary actuator 24 have the same configuration as the magnetic disk device 20 of FIG.

The lamp 31 is fixedly arranged so as to project substantially inward in the radial direction of the magnetic disk 23 in a state of being floated up with respect to the housing 21. At this time, it is formed so as to extend horizontally along the trajectory of the beam portion 32 provided at the tip of the rotary actuator 24. Further, the ramp 31 is formed in a thin round bar shape and extends straight downward in FIG. 12, that is, in a tangential direction with respect to the rotation center of the magnetic disk 23. Here, the lamp 31 is arranged such that the distance from the rotation center of the rotary actuator 24 is between the distances Ra and Rb of the beam portion 32, which will be described later.

As shown in FIG. 13, the beam portion 32 is formed into a thin round bar shape, and the rotary actuator 24 is provided.
Attached to the elastic member 24b. Here, the beam portion 32 extends obliquely with respect to the longitudinal direction of the elastic member 24b, that is, the magnetic disk 23 of the beam portion 32.
From the inner end 32a to the rotary actuator 24
The distance Ra to the rotation center o of the rotation shaft 24d of the
It is attached so as to be shorter than the distance Rb from the outer end portion 32b of the No. 2 to the rotation center o. Both ends of the beam portion 32 are fixedly held by the elastic member 24b via connecting portions 33a and 33b rising from both side edges of the elastic member 24b, so that the height of the one end 32a from the surface of the elastic member 24b. Is ha, the height of the other end 32b from the elastic member 24b is hb, and ha is smaller than hb. Therefore, the beam portion 26 is configured as a doubly supported beam. Both ends of the beam portion 32 are fixed to the connecting portions 33a and 33b by, for example, bonding or welding.

The disk device 30 according to this embodiment is configured as described above and operates as follows. When not in use, the rotary actuator 24 is retracted to the outside of the magnetic disk 23 at the stop position shown in FIG. It is listed. As a result, the head slider 24a of the rotary actuator 24 is separated from the surface of the magnetic disk 23 and held in the air, as shown in FIGS.

When starting from this state, after the spindle motor 22 starts up and reaches a predetermined number of revolutions,
The rotary actuator 24 rotates inward. On this occasion,
As shown in FIGS. 16 and 17, the rotary actuator 24 rotates while its beam portion 32 slides along the ramp 31 in the direction of arrow C3. At this time, the contact position of the beam portion 32 with respect to the ramp 31 moves from the end portion 32a to the end portion 32b, so that the tip of the rotary actuator 24 gradually descends toward the surface of the magnetic disk 23. Will be done. Then, the beam portion 32
Moves away from the lamp 31, and the head slider 24
a is the magnetic disk 23 based on the elasticity of the elastic member 24b.
The head slider 24a comes into contact with the surface of the magnetic disk 23 due to the levitation force acting on the head slider 24a by the air flow between the head slider 24a and the surface of the magnetic disk 23. No, it floats. As a result, this head slider 24a
The magnetic head (not shown) included in the magnetic disk 23 is sought by the rotation of the rotary actuator 24 in the direction of arrow C2 in FIG. 18 and FIG. As a result, the magnetic head records / reproduces information on / from a predetermined track on the magnetic disk 23.

When stopped, the rotary actuator 24 rotates toward the stop position shown in FIG. At this time, the beam portion 32 of the rotary actuator 24 is attached to the ramp 31.
By riding on and sliding on the head slider 2
4a separates from the surface of the magnetic disk 23. And
When the rotary actuator 24 reaches the stop position, the portion of the beam portion 32 on the side of the end portion 32a contacts the ramp 31, so that the head slider 24a moves to the magnetic disk 23.
It is kept away from the surface of the air and is held in the air. Then, the spindle motor 22 is stopped.

20 and 21 show a third embodiment of the magnetic disk device according to the present invention. 20, a magnetic disk device 40 includes a housing 41, a spindle motor 42, a magnetic disk 43 rotatably driven by the spindle motor 42, a linear actuator 44, a ramp 45, and a linear actuator 44. And a beam portion 46 provided at the tip portion. Here, regarding the housing 41, the spindle motor 42, and the magnetic disk 43, the housing 2 of the magnetic disk device 20 of FIG.
1, the spindle motor 22 and the magnetic disk 23 have the same structure.

Here, the direct-acting type actuator 44 comprises a flying type head slider 44a and the head slider 4a.
Elastic member 44b for supporting 4a, and this elastic member 44b
And a base 44d that supports the support member so as to be movable in the radial direction of the magnetic disk 43.

As shown in FIG. 21, the head slider 44a is attached to the lower surface of the tip of the elastic member 44b, and is pressed by the elastic member 44b against the surface of the rotating magnetic disk 43, so that the head slider 44a is moved. The air flow that flows between the lower surface of the magnetic recording medium 43 and the surface of the magnetic recording medium 43 a causes the surface of the magnetic recording medium 43 to float at a slight distance.

The elastic member 44b is made of an elastic material and is fixed to the tip of the support member 44c. The elastic member 44b acts as a spring based on its elasticity, and the head slider 44b.
a is pressed against the surface of the magnetic disk 43 with a predetermined load.

The supporting member 44c is made of a material having rigidity, is slidably supported by a roller bearing in the radial direction E1 of the magnetic disk 43 with respect to the base 44d, and is well known in the art. The head slider 44a is moved to the magnetic disk 4 by being moved in the direction of arrow E1 by a driving means such as a linear motor.
3 is moved in the radial direction E1 to perform a seek operation. As a result, the magnetic head (not shown) attached to the head slider 44a makes a seek operation with respect to the magnetic disk 43. As a result, the magnetic head records / reproduces information on / from a predetermined track on the magnetic disk 43.

The lamp 45 is fixedly arranged so as to project toward the inner side of the magnetic disk 43 in the radial direction in a state of being floated up with respect to the housing 41, and is rotated when the linear actuator 44 is moved. Along the locus of the beam portion 46 attached above the tip of the dynamic actuator 44, a slant 45a is formed in a slide shape, and in the illustrated case, the lower edge is low and the upper edge is high. Has been done.

As shown in FIG. 21, the beam portion 46 is formed in the shape of a thin round bar, and the rotary actuator 44.
The elastic member 44b is attached so as to extend in its longitudinal direction. In the illustrated case, the beam portion 46 has elastic members 44 via connecting portions 46a and 46b formed so that both ends thereof rise from the side edges of the elastic member 44b.
By being fixedly held by b, it is arranged at a predetermined distance above the surface of the elastic member 44b. Therefore, the beam portion 46 is configured as a doubly supported beam. In this case, the connecting portions 46a and 46b are fixed to the beam portion 46 by adhesion, welding or the like.

The disk device 40 according to this embodiment is configured as described above and operates as follows. When not in use, the direct acting actuator 44 is retracted to the outside of the magnetic disk 43 at the stop position shown in FIG. 20, and its beam portion 46 is placed on the upper surface of the ramp 45. As a result, the head slider 44a of the linear actuator 44 is separated from the surface of the magnetic disk 43 and held in the air, as shown in FIG.

When starting from this state, after the spindle motor 42 has started up and reached a predetermined number of revolutions,
The linear actuator 44 moves toward the center of the magnetic disk 43. At this time, the direct acting actuator 44
As shown in FIG. 23, the beam portion 46 rotates while sliding along the slope 45a of the ramp 45 in the arrow E2 direction. Then, the beam portion 46 separates from the ramp 45, and the head slider 44a moves toward the elastic member 44b.
Is pressed against the surface of the magnetic disk 43 on the basis of the elasticity of the head slider 44a. The air flow between the head slider 44a and the surface of the magnetic disk 43 causes a levitation force to act on the head slider 44a, so that the head slider 44a moves. ,
It floats without contacting the surface of the magnetic disk 43. As a result, the magnetic head (not shown) provided in the head slider 44a moves toward the magnetic disk 43 by the arrow E1 in FIG.
A seek operation will be performed in the direction. As a result, the magnetic head records / reproduces information on / from a predetermined track on the magnetic disk 43.

When stopped, the direct-acting actuator 44 moves toward the stop position shown in FIG. At this time, the beam portion 46 of the direct-acting actuator 44 is connected to the ramp 45.
When the head slider 44a rides on the slope of the magnetic disk 43 and slides along the slope 45a.
Away from the surface of. And the direct acting actuator 4
When 4 reaches the stop position, the beam portion 46 moves to the higher side of the slope 45a of the ramp 45, so that the head slider 44a is separated from the surface of the magnetic disk 43 and is held in the air. Then, the spindle motor 42 is stopped.

The above embodiment shows the case where the present invention is applied to the conventional magnetic disk devices 1 and 7 shown in FIG. 25 or 28. However, the present invention is not limited to this and, for example, the cartridge type shown in FIG. It is obvious that the present invention can be applied to the magnetic disk device 10.

Although the above embodiments have been described with respect to the magnetic disk device, the present invention is not limited to this, and the present invention is applied to a disk device for recording or reproducing other kinds of disks such as a magneto-optical disk and an optical disk. It is also possible.

[0066]

As described above, according to the present invention, the beam portion to be brought into contact with the lamp is fixed to the tip portion of the rotary actuator at both ends, preferably via the connecting portions. Therefore, this beam portion is configured as a double-supported beam. Therefore, since the rigidity of the beam is improved, the peak of its natural vibration is reduced and the beam portion is lightened. Further, since the beam portion to be brought into contact with the lamp is provided at a portion relatively closer to the rotation center of the rotary actuator, the inertial mass of the rotary actuator is reduced and the rotary actuator is rotated. The power consumption required for this will be reduced. Further, since the beam portion is arranged farther from the head slider attached to the tip of the rotary actuator,
The transmission of the natural vibration of the beam portion to the head slider is further suppressed. Therefore, the head can be easily positioned by the rotation of the rotary actuator during use, and the recording density and the capacity of the magnetic disk can be increased.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a first embodiment of a magnetic disk device according to the present invention when not in use.

FIG. 2 is an enlarged perspective view of an elastic support member of a rotary actuator in the magnetic disk device of FIG.

3 is an enlarged cross-sectional view showing a relationship between a rotary actuator and a lamp when the magnetic disk device of FIG. 1 is not used.

FIG. 4 is an enlarged cross-sectional view showing the relationship between a rotary actuator and a ramp when the magnetic disk device of FIG. 1 is loaded.

5 is an enlarged cross-sectional view showing a relationship between a rotary actuator and a lamp when the magnetic disk device shown in FIG. 1 is used.

6 is a schematic diagram showing a supporting state of a load plate in the magnetic disk device of FIG. 1. FIG.

7 is an enlarged perspective view showing a first modified example of the elastic support member of the rotary actuator of FIG.

8 is an enlarged perspective view showing a second modification of the elastic support member of the rotary actuator of FIG.

9 is a cross-sectional view of the elastic support member of FIG. 8 taken along the arrow direction.

10 is an enlarged perspective view showing a third modified example of the elastic support member of the rotary actuator of FIG.

11 is a cross-sectional view of the elastic support member of FIG. 10 taken along the arrow direction.

FIG. 12 is a schematic plan view of the second embodiment of the magnetic disk device according to the present invention when not in use.

13 is an enlarged perspective view of an elastic support member of the rotary actuator in the magnetic disk device of FIG.

FIG. 14 is an enlarged cross-sectional view showing the relationship between the rotary actuator and the lamp when the magnetic disk device of FIG. 12 is not used.

15 is an enlarged plan view showing the relationship between the rotary actuator of FIG. 14 and a lamp.

16 is an enlarged cross-sectional view showing the relationship between a rotary actuator and a ramp when the magnetic disk device of FIG. 12 is loaded.

17 is an enlarged plan view showing the relationship between the rotary actuator of FIG. 16 and a lamp.

18 is an enlarged cross-sectional view showing the relationship between a rotary actuator and a lamp when the magnetic disk device shown in FIG. 12 is used.

19 is an enlarged plan view showing the relationship between the rotary actuator of FIG. 18 and a lamp.

FIG. 20 is a schematic plan view of the third embodiment of the magnetic disk device according to the present invention when not in use.

21 is an enlarged perspective view of an elastic support member of the rotary actuator in the magnetic disk device of FIG.

22 is an enlarged cross-sectional view showing the relationship between the rotary actuator and the ramp when the magnetic disk device of FIG. 20 is not used.

23 is an enlarged cross-sectional view showing the relationship between the rotary actuator and the ramp when the magnetic disk device of FIG. 20 is loaded.

24 is an enlarged cross-sectional view showing the relationship between the rotary actuator and the ramp when the magnetic disk device of FIG. 20 is used.

FIG. 25 is a schematic plan view showing an example of a conventional magnetic disk device.

FIG. 26 is an enlarged side view of the tip portion of the rotary actuator in the magnetic disk device of FIG. 25.

FIG. 27 is an enlarged plan view of the tip portion of the rotary actuator of FIG. 26.

FIG. 28 is a schematic plan view showing an example of a conventional dynamic load-unload type magnetic disk device.

29 is an enlarged side view of the tip portion of the rotary actuator in the magnetic disk device of FIG. 28.

30 is an enlarged plan view of the tip portion of the rotary actuator of FIG. 29. FIG.

31 is a schematic diagram showing a state where the load plate is supported by a ramp in the magnetic disk device of FIG. 28. FIG.

FIG. 32 is a schematic plan view showing an example of a conventional cartridge type magnetic disk device.

[Explanation of symbols]

 20 magnetic disk device 21 housing 22 spindle motor 23 magnetic disk 24 rotary actuator 24a head slider 24b elastic member 24c arm 24d vertical axis 24e voice coil motor 24f voice coil 24h magnet 25 lamp 26 beam portion 26a, 26b connecting portion 27 magnetic Head 28 Beam part 28a, 28b Connecting part 28c Convex part 29 Beam part 29a, 29b, 29d, 29e Connecting part 29c Convex part 30 Magnetic disk device 31 Lamp 32 Beam part 33a, 33b Connecting part 40 Magnetic disk device 41 Housing 42 Spindle Motor 43 Magnetic disk 44 Rotation type actuator 44a Head slider 44b Elastic member 44c Support member 44d Base 45 Lamp 46 Beam part 46a, 46b Connection part

Claims (8)

[Claims] 1. A rotary actuator, which is swingably supported with respect to a disk that is a rotationally driven recording medium and has a magnetic head for recording and reproducing the disk at its tip, retracts to the outside of the disk. In a lamp loading device including a lamp that supports the rotary actuator in a state of being lifted upward, a beam portion provided at a tip end portion of the rotary actuator, and an upper surface of the beam portion and the rotary actuator. And a lamp arranged so as to project between the lamp and the lamp. 2. The lamp loading device according to claim 1, wherein the beam portion is fixed to a rotary actuator at both ends thereof via a connecting portion. 3. The lamp loading device according to claim 2, wherein the connecting portion is formed integrally with the beam portion. 4. The lamp loading device according to claim 2, wherein the connecting portion is formed integrally with the rotary actuator. 5. The lamp loading device of claim 2, wherein the connecting portion is integrally formed with the beam portion and the rotary actuator. 6. The lamp loading device according to claim 2, wherein the beam portion is provided with a hemispherical convex portion to be brought into contact with the lamp at a portion facing the rotary actuator. . 7. A disk as a recording medium, a drive means for rotationally driving the disk, a rotary actuator swingably supported with respect to the disk rotationally driven by the drive means, and a rotary actuator. A magnetic head for recording / reproducing the disk provided at the tip, a ramp having an inclined surface provided outside the disk for supporting the rotary actuator at a stop position when not in use, and a tip portion of the rotary actuator. A disk device, comprising: a beam portion provided on the disk, and a ramp arranged so as to project between the beam portion and the upper surface of the rotary actuator. 8. A cartridge which is attachable to and detachable from a main body, a disc which is a recording medium accommodated in the cartridge, a drive unit which rotationally drives the disc in the cartridge attached to the main unit, and a drive unit which drives the disc. A chucking mechanism fixed to the disk, a rotary actuator swingably supported with respect to a disk rotationally driven by a drive unit, and a magnetic head for recording / reproducing a disk provided at the tip of the rotary actuator. A ramp having an inclined surface which is provided on the outside of the disc and supports the rotary actuator at a stop position when not in use; a beam portion provided at the tip of the rotary actuator; And a ramp arranged so as to project from the upper surface of the die actuator.