WO1999016055A1

WO1999016055A1 - Disk device

Info

Publication number: WO1999016055A1
Application number: PCT/JP1998/004182
Authority: WO
Inventors: Junichi Mizukami; Takao Tanishima
Original assignee: Teac Corporation
Priority date: 1997-09-22
Filing date: 1998-09-17
Publication date: 1999-04-01
Also published as: JP3752551B2

Abstract

A disk device (11) has heads (31, 96) for reading/writing data from/in a recording area (53c) of a rotating disk (53), and sliding contact members (27, 28; 93, 94) abutting against non-recording areas (53a, 53b) of the disk (53). A head supporting guide mechanism is supported by the sliding contact members. The head supporting guide mechanism holds, with a predetermined distance (S) from the surface of the disk, the heads (31, 96) movably in predetermined direction with respect to the disk (53). The heads move over the disk while keeping the predetermined distance from the disk, so that no foreign matter is caught between the heads and the disk (53).

Description

Description Title of Invention

Disk unit technical field

The present invention relates to a disk device, and more particularly to a disk device that reads and writes information by bringing a head portion into sliding contact with the surface of a disk-shaped recording medium. Background art

2. Description of the Related Art In a disk device such as a magneto-optical disk device, a disk cartridge (hereinafter, referred to as a “cartridge”) containing a disk-shaped recording medium (hereinafter, referred to as a “disk”) is mounted on the disk device. At the same time as the loading operation of the force cartridge, the head arm supporting the magnetic head at the tip rotates, and the magnetic head comes into contact with the upper surface of the disk. Also, the optical pickup is moved to a position facing the lower surface of the disk.

The magnetic head and the optical pickup are moved in the radial direction of the disc so that they face each other with the disc interposed at the same track position of the disc. When writing information to a disc, a laser beam is irradiated from an optical pickup to raise the temperature of the recording area to a temperature of one or more points. At the same time, a magnetic field is applied to the recording area of the disk by the magnetic head to magnetize the recording area. As a result, the magnetization direction of the applied magnetic field is stored in the recording area. When reading information recorded on the disc, the disc is irradiated with laser light from an optical pickup. Then, the vibration direction of the polarization plane of the reflected light is detected, and it is determined whether or not the vibration direction is rotated once by the magnetic Kerr effect according to the magnetization direction of the recording area. In the above-described magneto-optical disk drive, the optical pickup does not contact the disk, but the magnetic head contacts the disk surface. A transparent resin layer is coated on the upper and lower surfaces of the magneto-optical recording film of the disk.

As described above, in the disk device in which the magnetic head slides on the disk surface, the disk surface is not damaged in a normal use. However, for example, if information is written or read in a state where foreign matter adheres to the magnetic head or the disk surface, the foreign material may scratch the disk surface and damage the disk surface. In particular, when a foreign substance harder than the hardness of the disk surface is interposed between the magnetic head and the disk surface, the surface of the recording area of the disk may be deeply scratched.

Thus, if the disk surface is deeply scratched, the scratch may reach the magneto-optical recording film. Such flaws can cause errors during the reading operation. Disclosure of the invention

Therefore, an object of the present invention is to provide a new and useful disk device that solves the above-mentioned problems.

A more specific object of the present invention is to provide a disk device in which foreign matter is not caught between the head and the recording medium by moving the head over the recording medium while maintaining a predetermined distance from the recording medium. To provide.

To achieve the above object, according to the present invention, there is provided a disk drive having a head for reading and / or writing information from / to a recording area of a rotating disk-shaped recording medium,

A sliding contact portion that comes into contact with the surface of the disk-shaped recording medium;

A head support guide that is supported by the sliding portion and holds the head movably in a predetermined direction with respect to the disk-shaped recording medium with the head separated from the surface of the disk-shaped recording medium by a predetermined distance. Mechanism and Is provided.

According to the above-described invention, the head is movably supported by the head support and guide mechanism supported by the sliding contact portion that comes into contact with the recording medium. Therefore, the sliding portion and the head that come into contact with the recording medium are separated from each other, and the sliding portion can be brought into contact with a portion other than the recording area of the recording medium. Further, since the position of the head and the recording medium can be determined based on the contact of the sliding portion with the recording medium, the distance between the head and the recording medium can be always kept constant. Therefore, the distance between the head and the recording medium can be kept very small. As a result, even when a magnetic head is used, it is possible to maintain a small distance between the head and the recording medium while maintaining an appropriate magnetic recording / reproducing function. Therefore, it is possible to prevent foreign matter from being caught between the head and the recording medium.

Generally, a disc-shaped recording medium has a non-recording area in which no information is recorded. Therefore, by making the sliding contact portion slide into contact with the non-recording area, the recording area is not damaged even if foreign matter enters between the sliding contact portion and the recording medium.

Further, since the non-recording area exists on the outer peripheral portion of the disk of the recording medium, and the sliding contact portion comes into contact with the outer peripheral portion, it is possible to prevent the disk from swinging during rotation.

Other objects, features and advantages of the present invention will become more apparent from the following detailed description when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an exploded perspective view of an embodiment of the disk drive of the present invention. FIG. 2 is an enlarged plan view of the magnetic head mechanism shown in FIG. FIG. 3 is a side view of the magnetic head mechanism in a state where the sliding portion is in sliding contact with the non-recording area of the disk.

FIG. 4 is a front view of the magnetic head mechanism in a state where the sliding portion is in sliding contact with the non-recording area of the disk. FIG. 5 is an exploded perspective view of the disk device.

FIG. 6 is a side view showing the inside of the disk device when the cartridge is not mounted.

FIG. 7 is a side view showing the inside of the disk device in a playback mode state after the attachment of the cartridge.

FIG. 8 is a side view showing the inside of the disk device in the recording mode after the attachment of the cartridge.

FIG. 9 is a perspective view of a first modification of the magnetic head support mechanism according to the present invention.

FIG. 10 is a plan view of a magnetic head mechanism having a first modification of the magnetic head support mechanism.

FIG. 11 is a side view of a magnetic head mechanism having a first modification of the magnetic head support mechanism.

FIG. 12 is a front view of a magnetic head mechanism having a first modification of the magnetic head support mechanism.

FIG. 13 is a plan view of a magnetic head mechanism having a second modification of the magnetic head support mechanism.

FIG. 14 is a side view of a magnetic head mechanism having a second modification of the magnetic head support mechanism.

FIG. 15 is a front view of a magnetic head mechanism having a second modification of the magnetic head support mechanism. BEST MODE FOR CARRYING OUT THE INVENTION

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a magneto-optical disk drive according to one embodiment of the present invention.

As shown in FIG. 1, the magneto-optical disk device 11 has a turntable 13 on which a magneto-optical disk (not shown) is mounted on a base 12. The evening table 13 has a magneto-optical disk hub. A magnet for magnet fishing 14 is buried.

The base 12 has a pickup opening 15 on the side of the turntable 13. Behind the pickup opening 15 (in the direction indicated by the arrow B), a pair of head arm support portions 16 is provided upright. The base 12 between the pair of head arm supports 16 is provided with a head arm passage opening 17. In addition, each of the head arm support portions 16 is provided with a shaft hole 16a through which the shaft 29 is inserted.

A magnetic head mechanism 18 is disposed on the upper surface side of the base 12 between the head arm support portions 16. The magnetic head mechanism 18 has a first head arm 19 that rotates vertically and a second head arm 20 that moves in the disk radial direction. The first head arm 19 is rotatably supported by a pair of head room supports 16. The first head arm 19 includes a pair of arms 21 and 22 extending in the directions indicated by arrows A and B, and a beam 23 and a beam extending between the arms 21 and 22. 24, and arms 25, 26 projecting downward from the rear ends of the arms 21, 22.

The arm portions 25, 26 of the first head arm 19 have bearings 25a, 26a on the upper portion thereof, and the shaft 25 mounted between the head arm support portion 16 is provided. Is inserted. The lower portions of the arms 25 and 26 are inserted into the head arm opening openings 17 and protrude from the lower surface of the base 12. In addition, engagement holes 25b and 26b are provided below the arms 25 and 26, respectively. The ends of the arms 21 and 22 are provided with sliding portions 27 and 28 which are in sliding contact with the surface of the disk. The sliding portions 27 and 28 are formed of a low-friction material so that they can slide on the surface of the disk with low friction. The lower surfaces of the sliding portions 27 and 28 have arcuate curved surfaces. The sliding portions 27 and 28 are provided with shaft holes 27 a and 28 a for supporting the magnetic head guide rod 30. The guide rod 30 moves between the tips of the arms 21 and 22 (indicated by arrows C and D). Direction).

The second head arm 20 that supports the magnetic head 31 has a sliding portion 32 that is slidably fitted to the guide rod 30. The height of the magnetic head 31 with respect to the disk surface is regulated by the guide rod 30 so as not to contact the disk. That is, the magnetic head 31 is guided by the guide rod 31 so that it can move while maintaining the same height with respect to the disk surface. The distance L between the sliding portions 27 and 28 of the first head arm 19 is larger than the width of the recording area of the disc. The first head arm 19 is mounted such that a pair of sliding portions 27 and 28 slide against a non-recording area of the disk. That is, one sliding contact portion 27 slides on the inner non-recording area and the other sliding contact portion 28 slides on the outer non-recording area. On the lower surface side of the base 12, a slider 35 for a head arm for driving the first head arm 19 is slidably provided in the directions indicated by arrows A and B. I have. The head arm slider 35 is provided with shafts 36, 37 fitted to the engagement holes 25 b, 26 b provided in the arms 25, 26 of the first head arm 19. Have. Therefore, the first head arm 19 rotates up and down around the shafts 36 and 37.

On the upper surface of the slider 35 for the head arm, an engaging pin 41 that stands through an elongated hole 38 of the base 12 and engages with the cam groove 40 of the cam gear 39 for mounting the cartridge stands upright. are doing. Therefore, when the cartridge mounting cam gear 39 is rotated, the engaging pin 41 moves along the cam groove 40, and the head arm slider 35 slides. As a result, the first head arm 19 can be rotated.

An optical pickup mechanism 42 is provided on the lower surface side of the base 12. The optical pickup mechanism 42 includes an optical head 44 supporting the optical head 43, a rack 45 extending laterally from the optical head 44, and a rack. And a driving gear 46 for driving the optical head 44 in the directions indicated by arrows C and D. A leaf spring 20a is fixed to the rear end of the second head room 20 supporting the magnetic head 31. The leaf spring 20a is screwed to the upper end of a vertical support 44a from the rear of the optical head arm 44. Therefore, the second head 20 is moved in the direction indicated by arrows C and D integrally with the optical head arm 44 with the magnetic head 31 facing the optical head 43. Can be moved to. At the time of recording, the end of the first head 19 is displaced downward (in the direction indicated by the arrow E), and the sliding portions 27 and 28 hit the non-recording area of the disk 53. Touch In this state, the leaf spring 20a bends, so that the magnetic head 31 approaches the disk upper surface.

On the lower surface side of the base 12, a driving mechanism 47 for driving the force cartridge for driving the cam gear 39 for mounting the force cartridge is attached. The rotation shaft 48 of the cartridge mounting drive motor 47 passes through the hole 49 of the base 12 and protrudes toward the upper surface of the base 12. A pulley 50 for transmitting rotation is fitted to the upper end of the rotating shaft 48.

FIG. 2 is an enlarged plan view of the magnetic head mechanism 18 according to the present invention. FIG. 3 is a side view of the magnetic head mechanism 18 in a state where the sliding portions 27 and 28 are in sliding contact with the non-recording area of the disk. FIG. 4 is a front view of the magnetic head mechanism 18 in a state where the sliding portions 27 and 28 are in sliding contact with the non-recording area of the disk.

As shown in FIGS. 2 to 4, the disk cartridge 51 is inserted into the force-holder 56 and moved to the mounting position in the disk device. With the disk cartridge 51 mounted in the disk drive, the first head arm 19 and the second head arm 20 rotate downward (in the direction indicated by the arrow E). The sliding portions 27 and 28 of the first head arm 19 are in sliding contact with the upper surface of the disk 53 stored in the disk cartridge 51. The arms 20 and 21 of the first head arm 19 have flexibility, and the first head arm 19 is moved in the direction indicated by the arrow E. When it rotates, it bends and presses the sliding portions 27 and 28 against the upper surface of the disk 53. At this time, the disk 53 is chucked by the magnet 14 on the turntable 13 and is rotating together with the evening table 13.

The sliding portions 27 and 28 of the first head arm 19 slide into contact with the non-recording areas 53 a and 53 b formed on the inner and outer peripheral sides of the disc 53, respectively, and guide rods 30. Height position is specified. In addition, a sliding portion 32 provided on the distal end side of the second head arm 20 is suspended between the distal ends of a pair of arms 21 and 22 of the first head arm 19. Guide rod 30 is slidably fitted.

Therefore, the sliding direction of the second head room 20 is guided by the shaft 29 and the guide rod 30. At this time, the magnetic head 31 is held at a position separated from the upper surface of the disk 53 by a minute gap S (S = about 0.05 to 0.1 mm in this embodiment).

That is, the magnetic head 31 faces the recording area 53 c of the disk 53 at a position separated by the minute gap S. Therefore, the magnetic head 31 can move in the disk radial direction without contacting the disk 53. As a result, even if a foreign substance adheres to the disk 53 or the magnetic head 31, the foreign substance is prevented from being caught between the recording area of the disk and the magnetic head 31. Therefore, it is possible to prevent the recording area on the surface of the disk 53 from being damaged. Further, it is possible to prevent the recording medium film of the disk 53 from being damaged by deep scratches.

Further, since the sliding portion 28 slides on the non-recording area 53b on the outer peripheral side of the disk 53, unnecessary vibration of the disk 53 can be suppressed. Thereby, high-density recording and reproduction can be performed stably. Next, the overall configuration of the disk device 11 will be described.

FIG. 5 is an exploded perspective view of the disk device 11.

As shown in FIG. 5, the disk drive 11 has a gate-shaped frame 54 fixed on a base 12, and A and B directions inside the frame 54. It has a gate-type cartridge mounting slider 55 slidably supported in the opposite direction, and a cartridge holder 56 movably provided inside the force cartridge mounting slider 55.

The frame 54 has a top plate 54a and left and right side plates 54b. The side plate portion 54b of the frame 54 has an L-shaped elongated hole 54c. A cam assembly 57 is attached to the side plate portion 54b of the frame 54. Further, a push lever 58 is attached to the top plate 54 a of the frame 54.

The cartridge mounting slider 55 has a top plate portion 55a, left and right side plate portions 55b, and an overhang portion 55c that extends in the B direction. The side plate portion 55b has an inclined groove 55d. An L-shaped arm 60 and a leaf spring member 61 are attached to the lower surface of the top plate portion 55a. A plate member 62 is provided on the overhanging portion 55c.

The cartridge holder 56 has a bottom plate portion 56a, left and right rising side plate portions 56b, and a force cartridge support portion 56c protruding inward from the side plate portion 56b. Further, a pin 70 protrudes laterally from the cartridge holder 56 on the side plate portion 56b. The pin 70 passes through the inclined groove 55d and the long hole 54c at a point where they intersect. Further, leaf spring members 71 and 72 are attached along the left and right side plate portions 56b.

The leaf spring members 71 and 72 have substantially V-shaped leaf spring portions 71a and 72a at the ends in the direction indicated by arrow B. The leaf spring portions 71a and 72a are respectively located on the projecting portions 56 on the side of the direction indicated by the arrow B, and face the bottom plate portion 56a. The leaf spring portions 71 a and 72 a serve to press the disk cartridge 51 inserted into the force cartridge holder 56.

The disk cartridge 51 has a shirt 51a for closing an opening provided at a position where the magnetic head 31 and the optical head 43 face each other. Shirt Evening 5 1A, Disc Cartridge 5 1 Opened by being inserted into the cartridge holder 56.

The base 12 has a magnetic head mechanism 18 as described above, a module 80 for driving a table 13 driving the module 13, an optical pick-up mechanism 42, and a cartridge mounted. Cam gear 39, cartridge mounting motor 47, printed board 84, head arm slider 35, pulley 82, gear 83, etc. are attached.

The rotational driving force of the cartridge mounting motor 47 is transmitted to the pulley 50, the belt (not shown), the pulley 82, the gear 83, the cartridge mounting force, and the gear 39, in that order. The slider 35 is driven in the directions indicated by arrows A and B.

Next, the operation of the disk device 11 configured as described above will be described. FIG. 6 is a side view showing the inside of the disk device when no cartridge is mounted, FIG. 7 is a side view showing the inside of the disk device in the playback mode after the cartridge is mounted, and FIG. 8 is a cartridge mounted. FIG. 6 is a side view showing the inside of the disk device in a recording mode state after the wearing.

1) Cartridge mounting operation:

As shown in FIG. 6, in a state before the cartridge is mounted, the cartridge holder 56 has been raised to the insertion / ejection position. In addition, the cartridge mounting slider 55 is at a sliding position in the direction indicated by arrow A. The slider 35 for the head arm is located near the direction indicated by the arrow A.

Therefore, the magnetic head mechanism 18 is held in a state where the first head arm 19 and the second head arm ₂₀ are displaced upward. At this time, the magnetic head 31 and the sliding portions 27 and 28 are also displaced above the force cartridge holder 56.

2) Playback operation:

When the disc cartridge 51 is inserted into the cartridge holder 56, the shirt 51a of the disc cartridge 51 opens. And When the end of the disc cartridge 51 is inserted into the force cartridge holder 56, the cartridge insertion detection switch (not shown) is turned on. At this time, the leaf spring portions 71a and 72a of the leaf spring members 71 and 72 press and hold the disk cartridge 51.

When a cartridge insertion detection switch (not shown) is turned on, the force-rigging mounting motor 47 is driven to rotate. As a result, the rotational driving force of the power cartridge mounting module 47 is transmitted to the cartridge mounting cam gear 39 via the pulley 50, a belt (not shown), the pulley 82, and the gear 83. Is done.

The cartridge mounting cam gear 39 has an engaging pin 39a that is inserted through the groove 55e of the projecting portion 55c of the cartridge mounting slider 55 and the groove 62a of the plate member 62. Therefore, the cartridge mounting slider 55 slides in the direction indicated by arrow B.

The cartridge mounting slider 55 has a pin 70 of the force cartridge holder 56 engaged with an inclined groove 55 d provided in the side plate portion 55 b. Therefore, the force holder 56 moves downward (in the direction indicated by the arrow E) as the slider 55 slides in the B direction. As a result, the force holder 56 holding the disk cartridge 51 is lowered to the mounting position shown in FIG.

The force cartridge mounting slider 55 moves in the direction indicated by arrow B. At this time, the engaging portion 58d of the push lever 58 is pressed by the pressing piece 61a of the panel member 61. As a result, the push lever 58 rotates counterclockwise in conjunction with the movement of the cartridge holder 56 in the direction indicated by the arrow E, and the front side of the disk cartridge 51 inserted into the cartridge holder 56. Continue pressing down on the top.

In this state, the optical head 43 becomes readable so as to face the lower surface of the disk 53 stored in the disk cartridge 51. At this time, the magnetic head 31 is separated above the disk 53. Therefore, the cartridge holder 56 cannot be moved to the mounting position. Thus, a state in which a reproduction operation is possible is established.

The optical head 43 and the optical head arm 44 are guided so as to be slidable along guide shafts 85, 86 extending in directions indicated by arrows C, D. The optical head 43 and the optical head arm 44 are moved in the directions indicated by arrows C and D (disc radius) by rotating the gear 46 coupled to the rack 45 of the optical head arm 44. Direction) and read the information recorded on the disk 53.

3) Recording operation:

When writing information to the disc 53, the output shaft 48 of the cartridge mounting module 47 is rotated at a predetermined angle by the recording mode setting operation.

As shown in FIG. 8, the slider 35 for the head arm has the engaging pin 41 that engages with the cam groove 40 of the cam gear 39 for mounting the cartridge. Slide in the direction shown by arrow B. The head arm slider 35 has shafts 36, 37 fitted into engagement holes 25b, 26b provided in the arms 25, 26 of the first head arm 19, respectively. Have. Therefore, the head arm slider 35 moves in the direction indicated by the arrow B, and the first head arm 19 rotates counterclockwise. When the arms 21 and 22 having flexibility bend, the sliding portions 27 and 28 abut on the upper surface of the disk 53.

The second head arm 20 has a sliding portion 32 that slidably fits on a guide rod 30 that is laid across the ends of the arms 21 and 22 of the first head arm 19. For this reason, the leaf spring 20a supporting the second head arm 20 is deflected in conjunction with the rotation operation of the first head arm 19, and the second head arm 20 is also turned counterclockwise. Move. Therefore, the magnetic head 31 provided at the tip of the second head arm 20 is close to the upper surface of the disk 53 and faces the recording area 53c. The sliding portions 27 and 28 of the first head arm 19 are in sliding contact with the non-recording areas 53 a and 53 b of the disk 53 to define the height position of the guide rod 30. The sliding portion 32 of the second head arm 20 is slidably fitted to the guide rod 30. For this reason, the second head 20 guides the magnetic head 31 to move while maintaining the magnetic head 31 at a height position separated from the upper surface of the disk 53 by a small gap S. . Therefore, the magnetic head 31 can move in the disk radial direction without contacting the upper surface of the disk 53. Therefore, even if foreign matter adheres to the disk 53 or the magnetic head 31, the foreign matter does not get caught between the disk 53 and the magnetic head 31, and adheres to the surface of the disk 53. Damage can be prevented.

The ejecting operation is achieved by performing the above cartridge mounting operation in reverse. That is, when the eject operation is performed, the cartridge mounting module 47 is rotated in the reverse direction, and the head slider 35 is slid in the direction indicated by the arrow A. As a result, the first head arm 19 and the second head arm 20 rotate in a direction away from the disk 35. Thereafter, the force cartridge mounting slider 55 moves in the direction indicated by the arrow A, and moves the force cartridge holder 56 up to the insertion / ejection position.

A pair of guide plates 91 and 92 are arranged in parallel at the ends of the arms 21 and 22 of the first head arm 19. The guide plates 91 and 92 have an L-shaped cross section. The guide plates 91 and 92 are fixed to the corners of the sliding portions 93 and 94 provided at the tips of the arms 21 and 22. The sliding portions 93 and 94 have projecting portions 93a and 94a on the lower surface. The protruding portions 93 a and 94 a protrude downward through a slit 95 formed between the guide plates 91 and 92.

The magnetic head 96 provided at the end of the second head arm 20 is Sliding surfaces 96a and 96b that abut against the guide plates 91 and 92; and a head portion located below the sliding surfaces 96a and 96b and close to the disk 53. 9 6c. The projecting distance of the head portion 96c from the sliding contact surfaces 96a and 96b is larger than the thickness of the guide plates 91 and 92. However, the protrusions 93a, 94a of the sliding portions 93, 94 project from the sliding surfaces 96a, 96b so that the projections 93a, 94a project more than the head 96c. The protruding distance of the head part 96c is determined.

FIG. 10 is a plan view of a magnetic head mechanism 18 having a first modification of the magnetic head support mechanism, and FIG. 11 is a magnetic head having a first modification of the magnetic head support mechanism. FIG. 12 is a front view of a magnetic head mechanism 18 having a first modification of the magnetic head support mechanism. In FIGS. 10, 11 and 12, the same portions as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 10 to 12, the projecting portions 93 a and 94 a of the sliding portions 93 and 94 come into sliding contact with the surfaces of the non-recording areas 53 a and 53 b of the disk 53. At this time, the head part 96 c is held at a position separated from the surface of the disk 53.

That is, the head portion 96 c of the magnetic head 96 is held at a position separated from the recording area 53 c of the disk 53 by the minute gap S. Therefore, the magnetic head 96 can move in the disk radial direction without contacting the disk 53. As a result, even if foreign matter adheres to the head 53 c of the disk 53 or the magnetic head 96, the foreign matter does not get caught between the disk 53 and the magnetic head 96. The surface of the disk 53 can be prevented from being damaged.

FIG. 13 is a plan view of a magnetic head mechanism 18 having a second modification of the magnetic head support mechanism; FIG. 14 is a side view of a second modification of the magnetic head support mechanism; FIG. 5 is a front view of a second modification of the magnetic head support mechanism. In FIGS. 13, 14, and 15, the same parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. As shown in FIGS. 13 to 15, the support portion 97 has a contact portion 97 b that comes into contact with the top plate 56 a of the cartridge holder 56, and projects downward from the contact portion 97 b. And a guide plate support portion 97a for supporting the guide plates 91, 92.

Therefore, in the recording mode state, of the support portions 97 and the sliding contact portions 94 provided at the tips of the arms 21 and 22 of the first head arm 19, the sliding contact portions 94 located on the outer peripheral side are disc-shaped. Along with sliding contact with the non-recording area 35, the contact portion 97b of the support portion 97 contacts the upper surface side of the top plate 56a of the cartridge holder 56.

As a result, the head portion 96 c of the magnetic head 96 is held at a position separated from the recording area 53 c of the disk 53 by the minute gap S. As a result, even if foreign matter adheres to the head 53 c of the disk 53 or the magnetic head 96, the foreign matter can be trapped between the disk 53 and the magnetic head 96. Therefore, it is possible to prevent the surface of the disk 53 from being damaged.

On the inner circumference side of the disk, the position of the contact portion 97 is regulated by the contact of the contact portion 97 b with the holder 56, so that only the sliding portion 94 comes into sliding contact with the disk 53. Therefore, the rotational load of the disk due to the sliding contact portion can be reduced.

The shape of the sliding portions 27, 28, 93, 94 is not limited to that of the above embodiment, and may be a flat shape, or a rotating body such as a roller may be used as the first head arm 1. It may be configured to be provided at the tip of 9.

In the above embodiment, the present invention is applied to a magneto-optical disk device. However, the present invention is not limited to this, and a disk device for recording or reproducing information by sliding a head portion on a disk. If so, it can be applied.

Further, in the above-described embodiment, a pair of sliding portions provided at the leading end of the first head 19 in the non-recording area of the disk are brought into sliding contact with the disk surface. However, the present invention is not limited to such a configuration. When the disk diameter is large, a configuration may be adopted in which a sliding contact portion made of a rotating body such as a roller is slidably contacted with a recording area at a substantially intermediate position between the non-recording areas on the inner peripheral side and the outer peripheral side.

The present invention is not limited to the specifically disclosed embodiments, and various modifications and improvements may be made within the scope of the present invention.

Claims

The scope of the claims

1. A disk device having a head (31, 96) for reading and / or writing information from / to a recording area (53c) of a rotating disk-shaped recording medium (53),

A sliding contact portion that contacts the surface of the disk-shaped recording medium (53); and a state in which the head is supported by the sliding contact portion and the head is separated from the surface of the disk-shaped recording medium by a predetermined distance (S). A head support and guide mechanism for holding the head (31, 96) movably in a predetermined direction with respect to the disc-shaped recording medium (53);

A disk device comprising:

2. The disk device according to claim 1, wherein

The disc-shaped recording medium (53) has a non-recording area (53a, 53b) in which information is not recorded, and the sliding portion slides on the non-recording area. apparatus.

3. The disk device according to claim 1, wherein

The disk device, wherein the predetermined direction is a radial direction of the disk-shaped recording medium (53).

4. The disk device according to claim 1, wherein

The disk device, wherein the predetermined distance (S) is a value in a range of 0.05 mm to 0.1 mm.

5. The disk device according to claim 1, wherein

The sliding contact portion includes a first sliding contact member (27) and a second sliding contact member (28),

The head support and guide mechanism includes a first arm (21) and a second arm. (22), a support guide member (30), and a third arm (20) for supporting the head (31).

The first sliding contact member (27) is attached to the first arm (21), and the second sliding contact member (28) is attached to the second arm (22). The support guide member (30) extends between the first sliding contact member (27) and the second sliding contact member (28), and the third arm (20) Is engaged with the support guide member (30), whereby the head (31) is held at a predetermined distance (S) away from the disk-shaped recording medium (53). Characteristic disk device.

6. The disk device according to claim 5, wherein

The first sliding contact member (27) contacts a non-recording area (53a) inside a recording area (53c) of the disk-shaped recording medium (53), and the second sliding contact is provided. A disk device characterized in that the member (28) abuts on a non-recording area (53b) outside the recording area (53c) of the disc-shaped recording medium (53).

7. The disk device according to claim 1, wherein:

The sliding contact portion includes a first sliding contact member (93) and a second sliding contact member (94),

The head support and guide mechanism supports a first arm (21), a second arm (22), a support and guide member (91, 92), and the head (96). And a third arm (20)

The first sliding contact member (93) is attached to the first arm (21), and the second sliding contact member (94) is attached to the second arm (22). The support guide member (91, 92) extends between the first sliding contact member (93) and the second sliding contact member (94), and the head (9, 92). 6) is engaged with the support guide member (91, 92), so that the head (96) can be connected to the disk-shaped recording medium (53). A disc device which is held at a predetermined distance (S) from the disc device.

8. The disk device according to claim 7, wherein

The first sliding contact member (93) has a projection (93a) that comes into contact with the disk-shaped medium, and the second sliding contact member (94) has a projection that comes into contact with the disk-shaped medium. (94a), the support guide member includes a first support guide member (91) and a second support guide member (92), and the head (96) is provided on a lower surface. It has a projection (966c),

The first support guide member (91) and the second support guide member (92) extend in parallel with the protrusion (93a, 94a) interposed therebetween, and the head ( The projection (96 c) of the projection (96) projects from a gap (95) formed between the first support guide member (91) and the second support guide member (92),

The height of the projection (93a) of the first sliding contact member (93) and the height of the projection (94a) of the second sliding contact member (94) are equal to the height of the head (96). A disk device characterized in that the predetermined distance (S) of the head (96) is maintained by being larger than the height of the projection (96c).

9. The disk device according to claim 7, wherein

The first sliding contact member (27) comes into contact with a non-recording area (53a) inside a recording area (53c) of the disk-shaped recording medium (53), and the second sliding contact A disk device characterized in that the member (28) abuts on a non-recording area (53b) outside the recording area (53c) of the disc-shaped recording medium (53).

10. The disk device according to claim 7, wherein

The first sliding contact member (27) comes into contact with a holder (56) for holding a cartridge (51) containing the disk-shaped recording medium (53). The second sliding member (28) abuts on a non-recording area (53b) outside the recording area (53c) of the disc-shaped recording medium (53). Disk device.