JPH05205422A - Disk recorder - Google Patents

Abstract

PURPOSE:To smoothly move a magnetic head moving at a high speed by preventing the head from sliding on a disk except at the time of recording so as to reduce wear and eliminating a member which is slid on a movable arm when the magnetic head is moved in the radius direction of the disk. CONSTITUTION:The movable arm 17 supporting the magnetic head 15 separates the magnetic head 15 from the disk by the energizing force of a twisted coil spring 22 applying upward except at the time of recording. The movable arm 17 is moved and the energizing force of the twisted coil spring 22 is applied downward then the magnetic head 15 is slid on the disk by a class detection lever 29 which is moved corresponding to the class of the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording apparatus for writing an information signal on a recording medium having a disc substrate.

[0002]

2. Description of the Related Art Conventionally, a recording medium having a disk substrate,
That is, there has been proposed a disk recording apparatus for recording an information signal by using a recording disk such as a so-called magnetic disk or a magneto-optical disk, or a disk cartridge configured by housing the recording disk in a cartridge.

The magneto-optical disk, which is the above-mentioned recording disk, has a disk substrate made of a transparent synthetic resin material and a signal recording layer made of a magnetic material adhered to one main surface of the disk substrate. Is configured.
The writing of the information signal to the magneto-optical disk is performed by irradiating the predetermined portion of the signal recording layer with the focused light flux and applying an external magnetic field. The irradiation of the light flux is performed through the disc substrate from the other main surface side of the disc substrate. Then, the application of the external magnetic field is performed from the main surface portion on one side of the disk substrate. The portion of the signal recording layer irradiated with the light flux loses its coercive force by being heated to a temperature higher than the so-called Curie temperature. Then, the heated signal recording layer is magnetized in the direction following the direction of the external magnetic field in the process of cooling.

That is, in the magneto-optical disk, while rotating the magneto-optical disk, the light intensity of the luminous flux or the magnetic field intensity of the external magnetic field is modulated in accordance with the information signal, whereby the signal recording layer The information signal can be recorded depending on the magnetization direction.

A disk device for recording an information signal using such a magneto-optical disk has a rotating operation mechanism for holding and rotating the magneto-optical disk and a magnetic head for applying an external magnetic field to the magneto-optical disk. The optical pickup device includes an optical pickup device and an optical pickup device that collects and irradiates a light flux on the magneto-optical disk. The magnetic head and the optical pickup device are arranged so as to face each other via the magneto-optical disk. That is, the magnetic head and the optical pickup device are connected to each other via the arm member. The magnetic head and the optical pickup device are arranged together with the arm member so as to be movable in the radial direction of the magneto-optical disk over the inner and outer circumferences of the magneto-optical disk.

The magnetic head has a magnetic core and a magnetic field generating coil wound around the magnetic core. The magnetic head is substantially in sliding contact with the signal recording layer via a thin synthetic resin layer such as a so-called protective layer or a slipping layer formed on the signal recording layer, oil or fat, etc. Is disposed in close proximity to. The optical pickup device is configured to include a light source such as a laser diode and an optical device that guides and focuses a light beam emitted by the light source. In this optical pickup device, the focal length of the objective lens that focuses the light flux on the signal recording layer is so positioned that the focus point of the light flux is located on the boundary surface between the signal recording layer and the disk substrate. And are arranged at a distance substantially equal to.

Thus, in the disk recording apparatus using the magneto-optical disk as the recording medium, not only the writing of the information signal to the magneto-optical disk but also the reading of the information signal recorded on the magneto-optical disk can be performed. There is one configured as. The information signal is read from the magneto-optical disk by irradiating the signal recording layer with a condensed light beam in a linearly polarized state and detecting the polarization direction of the light beam reflected by the signal recording layer. That is, when the light flux is reflected by the surface portion of the signal recording layer, the polarization direction is changed by the so-called Kerr effect according to the magnetization direction of the signal recording layer. Therefore, the change in the magnetization direction of the signal recording layer can be read by detecting the polarization direction of the reflected light flux.

The detection of the reflected light flux is performed by an analyzer and a photodetector provided in the optical pickup device. This analyzer is a so-called Wollaston prism, a half-wave plate, or the like, and converts a difference in polarization direction into a change in light intensity. The photodetector is a photodiode, a phototransistor, or the like, and converts the light intensity of the received light flux into an electric signal.

[0009]

As described above, when the information signal is written to the magneto-optical disk in the disk recording device, both the magnetic head and the optical pickup device are operated. But,
In this disc recording device, when reading an information signal from the magneto-optical disc, only the optical pickup device is operated and the magnetic head is not operated.

However, in the disk recording apparatus, the magnetic head is in a position in substantially sliding contact with the magneto-optical disk not only when writing the information signal but also when reading the information signal. There is.

The sliding contact of the magnetic head with the magneto-optical disk causes abrasion of the magnetic head and the magneto-optical disk. In the disk recording apparatus, when the frequency of sliding contact between the magnetic head and the magneto-optical disk is high, the service life of the magnetic head and the magneto-optical disk is shortened.

Therefore, conventionally, the magnetic head is slidably contacted with the magneto-optical disk only when the information signal is written, and the magnetic head is separated from the magneto-optical disk when the information signal is read. A disk recording device having such a structure has been proposed.

In this disc recording apparatus, the magnetic head is supported so as to be able to come into contact with and separate from the magneto-optical disc. That is, in this disc recording device, the arm member supporting the magnetic head is movable in the direction of approaching and separating from the optical pickup device, and the magnetic head is moved relative to the magneto-optical disc. It is elastically biased in the direction of approaching. When the information signal is read from the magneto-optical disk, the arm member is held by the holding member at a position that separates the magnetic head from the magneto-optical disk, and the information signal to the magneto-optical disk is held. When the writing is performed, the holding by the holding member is released and the magnetic head is moved to a position close to the magneto-optical disk.

The holding member is moved according to whether the disc recording apparatus is writing or reading an information signal. Since the holding member needs to hold the arm member when reading the information signal, whichever position the optical pickup device and the magnetic head are moved in the radial direction of the magneto-optical disk. It is provided over the movable range of the magnetic head over the inner and outer circumferences of the magneto-optical disk.

In this disk recording apparatus, since the frequency of sliding contact between the magnetic head and the magneto-optical disk is reduced, the service life of the magnetic head and the magneto-optical disk can be extended.

However, in the disk recording apparatus in which the magnetic head is separated from the magneto-optical disk by holding the arm member by the holding member as described above, the magnetic head is used. Also, when the optical pickup device is moved in the radial direction of the magneto-optical disk, the holding member and the arm member are in sliding contact with each other. Therefore, in this disc recording device, the operation of moving the optical pickup device and the magnetic head in the radial direction of the magneto-optical disc may not be performed smoothly at high speed.

Therefore, the present invention is proposed in view of the above situation, and the sliding contact of the magnetic head with the recording medium is performed only when writing the information signal, A disk recording device which is designed to minimize wear of the magnetic head and the recording medium and to smoothly and rapidly move the magnetic head in the radial direction of the disk substrate of the recording medium. The purpose is to provide.

[0018]

In order to solve the above problems and achieve the above object, a disk recording apparatus according to the present invention is a disk mounting section on which a recording medium having a disk substrate is mounted, and this disk mounting section. A magnetic head that is arranged to be movable in the radial direction of the disk substrate of the recording medium mounted on the magnetic head, and that supports the magnetic head and brings the magnetic head close to the disk substrate of the recording medium mounted on the disk mounting portion. 1 and a second position for moving the magnetic head away from the disk substrate, a magnetic head supporting member, and the magnetic head supporting member for the first position and the second position. Elastic urging means for elastically urging in a direction away from a neutral position which is an intermediate position of the recording medium, and provided on the recording medium when the recording medium is mounted on the disc mounting portion. The magnetic head supporting member, which is in the second position by being operated in accordance with a marking portion indicating the type of the recording medium, is moved to the first position beyond the neutral position. And a magnetic head control member that is moved to the side.

[0019]

In the disk recording apparatus according to the present invention, the recording medium mounted in the disk mounting portion is arranged so as to be movable in the radial direction of the disk substrate, and the magnetic head is supported to support the magnetic head. The magnetic head support member, which is movable and movable between a first position in which the magnetic head is close to the magnetic disk and a second position in which the magnetic head is separated from the disk substrate, is elastically biased by the elastic biasing means. When the magnetic head control member is operated in accordance with the marking portion of the recording medium, the magnetic head control member is elastically biased in a direction away from a neutral position which is an intermediate position between the position and the second position.
It is moved to the side of the first position beyond the neutral position to reach the first position.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. In this example, the disc recording device according to the present invention is configured as a device for recording and reproducing information signals using a disc cartridge which is a recording medium having a disc substrate.

FIG. 9 shows the above-mentioned disc cartridge.
The recording / reproducing disc cartridge shown in FIG. 10 and the reproduction-only disc cartridge shown in FIG. 10 are used.

The recording / reproducing disk cartridge is constructed by rotatably housing the recording / reproducing disk 101 in the recording / reproducing cartridge 102. The recording / reproducing disk 101 is a so-called magneto-optical disk, and is a disk-shaped disk substrate made of a transparent synthetic resin or the like, and a signal made of a magnetic material adhered to one main surface of the disk substrate. And a recording layer. A chucked portion 106 is provided at the center of the disc substrate. The chucked portion 106 is composed of a circular through hole formed in the disk substrate and a metal plate that closes the through hole.
The through hole of the chucked portion 106 has its center aligned with the center of curvature of a recording track that is formed in a spiral in a substantially concentric shape in the signal recording layer.

The recording / playback cartridge 102 is
It is formed in a thin housing having a size capable of accommodating the recording / reproducing disk 101. An opening 103 for a magnetic head is formed in the main surface portion of the upper surface of the recording / reproducing / reading cartridge 102 so that the one main surface portion of the recording / reproducing / reading disk 101 faces the outer side over the inner and outer circumferences. ing. Also, the recording / playback cartridge 10
The recording / playback disc 1 is provided on the lower main surface of
An opening portion 104 for the optical pickup device is provided so that the main surface portion on the other side of 01 faces the outer side over the inner and outer circumferences. The openings 103 and 104 are formed at positions facing each other and have substantially the same size and shape. That is, the openings 103 and 104 are sides on the side with respect to the mounting direction of the recording / reproducing disc cartridge in the disc recording device, from the substantially central position of each main surface of the recording / reproducing cartridge 102. It is formed in a substantially rectangular shape over the vicinity of the part.
A chucking opening for exposing the chucked portion 106 to the outside is provided in the center of the main surface portion on the lower surface side of the recording / playback cartridge 102.

The recording / playback cartridge 1 is also used.
A shutter member 105 for opening and closing the openings 103 and 104 is slidably attached to 02. The shutter member 105 is configured by bending a rectangular thin plate member made of synthetic resin, metal, or the like into a U shape, and the opening portions 103, 1 are formed by the side portions.
04 can be closed. This shutter member 1
Reference numeral 05 denotes the recording / playback cartridge 10 in the central portion.
2 by one side edge, as shown by arrow S in FIG.
It is supported so as to be slidable in the front-back direction along the one side edge. The shutter member 105 is slid with respect to the recording / reproducing cartridge 102,
The openings 103 and 104 are opened and closed.

The recording / playback cartridge 10 is also used.
A pair of front and rear positioning holes 10 are provided in the main surface portion on the lower surface side of 2.
8,109 are drilled. These positioning holes 10
8, 109 are adapted to position the recording / reproducing cartridge 102 with respect to the disc mounting portion of the disc recording device by inserting a positioning pin in the disc recording device described later. A recording / reproducing dual-purpose marking portion 107 is provided at the front end side position of the main surface portion on the lower surface side of the recording / reproducing dual cartridge 102. The recording / reproducing dual-purpose indicator 107 has a very shallow depth and has the recording / reproducing dual-use cartridge 102.
Is a recess formed on the main surface of the.

Further, the recording / reproducing cartridge 1 is also used.
The shutter member 10 is provided on one edge of the shutter member 10 from the front end side.
A shutter opening groove 114 is provided across the central portion of the No. 5. In the disc recording apparatus, the shutter opening pin is inserted into the shutter opening groove 114 from the front side, so that the shutter member 105 is slid to the rear side of the recording / playback cartridge 102.
The openings 103 and 104 are opened. Further, at the side edge portion of the recording / playback cartridge 102 on the other side facing the one side edge portion, an erroneous insertion prevention groove 113 is provided from the front end side.
Is provided. In the above-mentioned disc recording apparatus, an incorrect insertion prevention pin is inserted into the incorrect insertion prevention groove 113 from the front side.

On the other hand, in the reproduction-only disc cartridge, the reproduction-only disc 110 is a reproduction-only cartridge 1.
11 is rotatably housed. The reproduction-only disc 110 has a disc-shaped disc substrate made of a transparent synthetic resin or the like, and a reflective layer made of a metal material adhered to one main surface portion of the disc substrate. There is. The read-only disc 110 has the same size as the recording / playback disc 101. An information signal is recorded on the main surface portion of one side of the disc substrate of the reproduction-only disc 110 by forming fine irregularities by means such as injection molding. A chucked portion 106 is provided at the center of the disc substrate. This chucked part 1
Similarly to the chucked portion 106 of the recording / reproducing disk 101, the reference numeral 06 is composed of a circular through hole formed in the disk substrate and a metal plate closing the through hole.

The reproduction-only cartridge 111 is formed in a thin casing having a size capable of accommodating the reproduction-only disc 110. An opening 104 for an optical pickup device is formed in the lower main surface of the reproduction-only cartridge 111 so that the other main surface of the reproduction-only disc 110 faces the outer side over the inner and outer circumferences. There is. The opening portion 104 for the optical pickup device extends from substantially the center position of each main surface portion of the reproduction-only cartridge 111 to the vicinity of the side portion on the side with respect to the mounting direction of the reproduction-only disc cartridge in the disc recording device. , Is formed in a substantially rectangular shape. A chucking opening for exposing the chucked portion 106 to the outside is provided at the center of the main surface portion on the lower surface side of the reproduction-only cartridge 111.

Then, the reproduction-only cartridge 111
A shutter member for opening and closing the optical pickup device opening 104 is slidably attached to the. This shutter member is formed by bending one end side of a rectangular thin plate member made of synthetic resin, metal, or the like, and is configured to be able to close the optical pickup device opening 104. This shutter member is supported at its bent one end side by the one side edge portion of the reproduction-only cartridge 111 so as to be slidable in the front-back direction along the one side edge portion as shown by an arrow S in FIG. ing. This shutter member opens and closes the optical pickup device opening 104 by sliding with respect to the reproduction-only cartridge 111.

The reproduction-only cartridge 111 has a pair of front and rear positioning holes 108 and 109, and the shutter opening groove 1 in the same manner as the recording / reproduction cartridge 102.
14 and an erroneous insertion prevention groove 113 are provided.

Then, this reproduction-only cartridge 111
At the position of the front end of the main surface on the lower surface side of the
12 are provided. This reproduction-only labeling unit 112
It is a concave portion formed in the main surface portion of the reproduction-only cartridge 111 so as to be deeper than the recording / reproduction / display portion 107.

As shown in FIG. 1, the disc recording apparatus has a chassis 1. On the chassis 1, a disc mounting portion is formed. That is, the spindle motor 2 is attached to the lower surface side of the chassis 1 substantially at the center. The spindle motor 2 has a through hole formed in the chassis 1
The drive shaft 5 is projected to the upper surface side of the chassis 1. A disc table 3 which constitutes the disc mounting portion is attached to the tip end side of the drive shaft 5. The disc table 3 is formed in a substantially disc shape, and the drive shaft 5 is fitted into a support hole provided at the center of the disc table 3.
Supported by. On the upper surface side of the disc table 3, a centering member 4 formed in a substantially truncated cone shape is provided. The centering member 4 is formed to have an outer diameter that can be fitted into the through hole of the chucked portion 106 of each of the disks 101 and 110. The centering member 4 makes the outer peripheral surface portion contact the inner edge portion of the through hole when the peripheral side portion of the through hole of each of the disks 101 and 110 is placed on the disk table 3, and thus The disks 101 and 110 are centered.

A magnet for attracting the metal plate of the chucked portion 106 of each of the disks 101 and 1110 is attached to the disk table 3. With this magnet, the disk table 3 positions and holds the disks 101 and 110.

On the chassis 1, a pair of front and rear positioning pins 12, 1 constituting the disc mounting portion are provided.
3 have been planted. These positioning pins 12, 13
Has a substantially conical shape with its diameter reduced on the tip side.
The positioning pins 12 and 13 are used for the positioning holes 1 of the disk cartridges mounted on the chassis 1.
The cartridges 102 and 111 are fitted to the chassis 1 to position the cartridges 102 and 111 with respect to the chassis 1.

An optical pickup device 6 is attached to the chassis 1 so as to be movable in a direction of contacting and separating from the spindle motor 2 as shown by an arrow T in FIG.

The optical pickup device 6 has an optical block portion, and a light source such as a laser diode, a predetermined optical device for guiding a light beam emitted from the light source, and the disks 101 and 110 are reflected in the optical block portion. In addition to having a built-in photodetector and the like for receiving the luminous flux, an objective lens driving device is attached to the optical block section. In this optical pickup device, the luminous flux emitted from the light source is emitted from the optical block portion and is incident on the objective lens 7 supported by the objective lens driving device. This objective lens 7 is
The incident light flux is condensed. The objective lens driving device operates to move the objective lens 7 in two axial directions, that is, an optical axis direction of the objective lens and a direction orthogonal to the optical axis.

The optical pickup device 6 is supported by a guide shaft 8 and a screw shaft 9 which are parallel to each other and are supported on the lower surface side of the chassis 1.
The guide shaft 8 and the screw shaft 9 can be moved in the axial direction. That is, the guide shaft 8 is inserted into the bearing hole formed in the optical block portion. The screw shaft 9 is threadedly inserted into a screw bearing hole formed in the optical block portion. This screw shaft 9
The optical pickup device feed motor 10 disposed on the lower surface side of the chassis 1 can be rotated about its axis. When the screw shaft 9 is rotated by the optical pickup device feed motor 10, the optical pickup device 6 is moved in the axial direction of the screw shaft 9 and the guide shaft 8 as shown by an arrow T in FIG. ..

In the optical pickup device 6, the objective lens driving device faces the upper side of the chassis 1 through a slit-shaped opening provided in the chassis 1. In this optical pickup device, the optical axis of the objective lens 7 is perpendicular to the chassis 1.

A magnetic head 15 is attached to the optical pickup device 6 via a magnetic head supporting member. The magnetic head support member has a connecting arm portion 14 attached to the optical block portion of the optical pickup device 6 at the base end side and extending substantially parallel to the chassis 1.
A magnetic head support arm 17 is rotatably supported on the tip end side of the connecting arm portion 14. The magnetic head supporting arm 17 has a lower end side supported by the connecting arm portion 14 and a vertical portion protruding upward from the chassis 1 via a notch portion 16 provided on the rear side of the chassis 1. It is composed of a horizontal portion integrally connected to the upper end side of the vertically extending portion and extending substantially parallel to the connecting arm portion 14 toward the optical pickup device 6 side. The base end side of the magnetic head support arm 17, that is, the lower end side of the vertical portion is
A support projection 21 integrally formed on the tip side of the connecting arm portion 14 is rotatably supported via a support shaft 18. By rotating the magnetic head support arm 17 around the support shaft 18, the tip end side, that is,
It is possible to displace the free end side of the horizontal portion in the direction of contacting with and separating from the chassis 1.

The magnetic head 15 is attached via a leaf spring 19 to the end of the magnetic head support arm 17 facing the chassis 1. The magnetic head 15 is held at a position facing the objective lens 7. That is, the magnetic head 15 is located on the optical axis of the objective lens 7 and can move in the direction of coming into contact with and separating from the objective lens 7.

By rotating the magnetic head support arm 17 about the support shaft 18, the magnetic head 15 is slidably contacted with the recording / reproducing disk 101 when the recording / reproducing disk cartridge is mounted. When the read-only disc cartridge is loaded, the magnetic head 15 is moved to a second position where the magnetic head 15 is separated from the read-only disc 110.

At the tip end side of the connecting arm portion 14, first and second rotation restricting pieces 23, 24 for restricting the rotatable range of the magnetic head supporting arm 17 are provided on the magnetic head supporting arm 17. It is projected so as to sandwich the base end side portion. That is, when the base end side of the magnetic head support arm 17 contacts the first rotation restricting piece 23 and the rotation is restricted, the magnetic head support arm 17 is stopped.
Is in the first position. Further, the base end side of the magnetic head support arm 17 is the second rotation restricting piece 24.
The magnetic head support arm 17 is in the second position when the rotation of the magnetic head support arm 17 is restricted.

The portion of the magnetic head supporting arm 17 on the base end side of the support shaft 18 and the connecting arm portion 1
A torsion coil spring 22, which serves as an elastic biasing means, is bridged between the end portion 4 and the end portion 4. That is, the torsion coil spring 22 has one arm portion locked to the base end side portion of the magnetic head support arm 17 and the other arm portion locked to the tip end side portion of the connecting arm portion 14. There is. The torsion coil spring 22 elastically biases the magnetic head support arm 17 in a direction away from a neutral position which is an intermediate position between the first position and the second position. As shown in FIG. 3, the neutral position means a position where one arm portion of the torsion coil spring 22 is locked and a position where the other arm portion of the torsion coil spring 22 is locked. The position where the support shaft 18 is aligned with the support shaft 18. When the magnetic head support arm 17 is in this neutral position, the biasing force of the torsion coil spring 22 is in the direction passing on the axis of the support shaft 18, and the force for rotating the magnetic head support arm 17 is exerted. Do not cause it.

The torsion coil spring 22 has a structure in which the above-mentioned torsion coil springs 22
As shown in FIG. 3, the base end side portion of the magnetic head support arm 17 is pressed to move the magnetic head support arm 17 to the magnetic head 1 as shown by an arrow A in FIGS.
5 is urged to rotate so as to separate it from the objective lens 7. At this time, the magnetic head support arm 17 is
The second position is set. This torsion coil spring 22
When the magnetic head support arm 17 is pivoted to the first position side beyond the neutral position, the magnetic head support arm 17 presses the base end side portion of the magnetic head support arm 17, 17 is rotationally biased in the direction of forming the first position.

A controlled pawl 20 is provided on the vertical portion of the magnetic head support arm 17 so as to project therefrom. The controlled pawl 20 is provided on the rear surface side of the vertical portion so as to move upward when the magnetic head 15 is lowered toward the chassis 1, and the magnetic head 15 is moved toward the chassis 1.
When it is further separated and raised, it is moved downward.

In the cutout portion 16 of the chassis 1, there is provided a marking portion detection arm 29 which constitutes a magnetic head control member. This sign detection arm 2
Numeral 9 is rotatably supported on the chassis 1 through a support shaft 30 at a substantially middle portion, and one end side thereof is directed toward the rear side of the chassis 1. The marking portion detection arm 29 is
The one end side is rotatable so that it can be moved in a direction perpendicular to the chassis 1. The marking portion detecting arm 29 has a marking portion detecting pin 32 on the other end side, with an upper protruding piece portion 35 protruding upward. The sign detection pin 32 is projected above the chassis 1. A control arm portion 37 is integrally extended to one end side of the marking portion detection arm 29. The control arm portion 37 extends toward the upper side of the chassis 1 so as to be substantially perpendicular to the chassis 1.
The control arm portion 37 has a tip end having a height substantially equal to that of the controlled pawl 20. A magnetic head control shaft 31 forming a magnetic head control member is erected on the tip side of the control arm portion 37 so as to be parallel to the guide shaft 8. This magnetic head control shaft 3
In the initial state, as shown in FIG. 2, 1 is supported at a position slightly below the controlled pawl 20.

The marking portion detecting arm 29 has a lower projecting piece portion 36 projecting downward from the other end of the marking portion detecting arm 29 and a spring locking pin 3 that is erected on the chassis 1.
By the tension coil spring 33 stretched between 4 and
As indicated by an arrow B in FIG. 1, the sign detection pin 32 is projected upward of the chassis 1 and is rotationally biased in a direction in which the magnetic head control shaft 31 is separated from the controlled pawl 20. There is.

On the chassis 1, there is provided a cartridge holder 11 for holding each of the disc cartridges by inserting the disc cartridges from the front side. As shown in FIGS. 2 and 4, the cartridge holder 11 is rotatably supported on the chassis 1 with its rear side as an axis, and is capable of coming into contact with and separating from the chassis 1. ..

In the disc recording apparatus according to the present invention constructed as described above, in order to mount the recording / reproducing disc cartridge or the reproduction-only disc cartridge, first, as shown in FIG. The holder 11 is rotated in a direction away from the chassis 1. At this time, the magnetic head supporting arm 1
7 is the second position. When the magnetic head support arm 17 is not in the second position, it is pushed up by the cartridge holder 11 to the second position.

When the recording / reproducing disc cartridge is inserted into the cartridge holder 11 from the front side, the shutter member 105 in the recording / reproducing disc cartridge is operated by a shutter opening pin (not shown) or the like. The recording / reproducing cartridge 102 is moved and operated to open the magnetic head opening 103 and the optical pickup device opening 104.
Open the lid.

When the cartridge holder 11 is moved to the chassis 1 side, the recording / reproducing disk cartridge is mounted and mounted on the chassis 1 as shown in FIG. At this time, the recording / reproducing dual-use cartridge 102 has the pair of positioning holes 109 and 108.
The pair of positioning pins 12 and 13 are fitted into the to position the chassis 1 with respect to the chassis 1. Further, the recording / reproducing disk 101 is positioned and mounted on the disk table 3 while being centered by the centering member 4. At this time, the spindle motor 2 can rotate the recording / reproducing disk 101 together with the disk table 3.

Then, the marking portion detecting pin 32 is pressed by the recording and reproducing marking portion 107, and the marking portion detecting arm 29 resists the urging force of the tension coil spring 33 and is indicated by an arrow C in FIG. As shown, the marking portion detection pin 32 is rotated in the direction in which it is retracted to the lower side of the chassis 1. Then, the magnetic head control shaft 3
Reference numeral 1 makes contact with the controlled pawl 20 and presses the controlled pawl 20 upward to rotate the magnetic head support arm 17 beyond the neutral position to the first position side.

The magnetic head support arm 17 positioned closer to the first position than the neutral position is rotated by the urging force of the torsion coil spring 22 as shown by an arrow D in FIG. As shown in FIG. 5, the first position is set. At this time, the magnetic head 15 enters the recording / playback cartridge 102 through the magnetic head opening 103, and is brought into contact with the main surface portion on one side of the recording / playback disk 101. At this time, the magnetic head control shaft 31 and the controlled pawl 20 are separated from each other by rotating the magnetic head support arm 17 to the first position.

In this state, the optical pickup device 6 makes the objective lens 7 face the main surface portion on the other side of the recording / reproducing disk 101 through the optical pickup device opening 104. There is. Further, the optical pickup device 6 is such that the objective lens 7 is opposed to the recording / reproducing disk 101,
The recording / reproducing disk 101 is movable over the inner and outer circumferences. The optical pickup device 6 is capable of irradiating the signal recording layer with a light beam through the other main surface portion. Further, at this time, the spindle motor 2, the optical pickup device 6, and the magnetic head 15 are actuated so that an information signal can be written to the recording / reproducing disk 101. That is, the recording / reproducing disk 101 is rotated, and the optical pickup device 6 collects and irradiates a light flux on the signal recording layer to heat the irradiation area, and the magnetic head 15 is applied to the heated portion. An information signal is written by applying an external magnetic field.

When the power of the disc recording apparatus is turned on or the control for instructing the start of the recording mode is performed, the optical pickup device 6 causes the innermost portion of the signal recording area of the recording / reproducing disc 101. It is moved to a position corresponding to the circumference. This is so-called catalog information (T) recorded on the recording / reproducing disk 101.
This is for reading OC information). The catalog information is recorded on the innermost side of the signal recording area of the recording / reproducing disk 101.

On the other hand, when the read-only disc cartridge is inserted into the cartridge holder 11 from the front side, the shutter member 105 of the read-only disc cartridge is read-only by a shutter opening pin or the like (not shown). It is moved with respect to the cartridge 111 to open the optical pickup device opening 104.

When the cartridge holder 11 is moved to the chassis 1 side, the read-only disc cartridge is mounted and mounted on the chassis 1 as shown in FIG. At this time, the reproduction-only cartridge 1
11 is obtained by fitting the pair of positioning pins 12 and 13 into the pair of positioning holes 109 and 108.
It is positioned with respect to the chassis 1. The read-only disc 110 is positioned and mounted on the disc table 3 while being centered by the centering member 4. At this time, the spindle motor 2 can rotate the recording / reproducing disk 101 together with the disk table 3.

In the marking section detection pin 32, the reproduction-only marking section 112 is the recording / playback marking section 107.
By being deeper than this, the reproduction-only marking section 112 does not enter and is not pressed by the reproduction-only cartridge 111. Therefore, the above-mentioned marking portion detection arm 29
Is maintained in the initial state by the urging force of the tension coil spring 33, and the marking portion detection pin 32 is projected above the chassis 1. Therefore, the magnetic head control shaft 31 does not move from the initial position and does not contact the controlled pawl 20. The magnetic head support arm 17 is held at the second position by the biasing force of the torsion coil spring 22 shown by the arrow A in FIG.

In this state, in the optical pickup device 6, the objective lens 7 is opposed to the main surface portion on the other side of the read-only disc 110 through the optical pickup device opening 104. .. Also,
The optical pickup device 6 is movable along the inner and outer circumferences of the recording / reproducing disk 101.
The optical pickup device 6 is capable of irradiating the reflection layer with a light beam through the other main surface portion. Then, in this state, by operating the spindle motor 2 and the optical pickup device, it becomes possible to read the information signal from the read-only disc 110. That is, the reproduction-only disc 110 is rotated, a light flux is condensed and applied to the reflective layer by the optical pickup device 6, and an information signal is read by detecting a reflected light flux of the light flux.

When the disc recording apparatus is turned on or a control for instructing the start of the reproduction mode is made, the optical pickup device 6 causes the reproduction-only disc 110 to have the innermost circumference of the signal recording area. The catalog information is read by moving to a position corresponding to the copy.

Then, as shown in FIG. 2, in order to take out each of the disc cartridges mounted in the disc recording device from the disc recording device as described above, as shown in FIG. Rotate to.

At this time, the magnetic head supporting arm 17
Is in the first position, the magnetic head support arm 17 is pushed upward by the cartridge holder 11 and is rotated to the second position side from the neutral position. .. Therefore, the magnetic head support arm 17 is rotated by the biasing force of the torsion coil spring 22 as shown by an arrow A in FIG.
The second position is set. Further, at this time, the marking portion detecting arm 29 causes the recording / playback cartridge 1 to operate.
When 02 is separated from the chassis 1, it is returned to the initial position in which the marking portion detection pin 32 is projected to the upper side of the chassis 1 by the urging force of the tension coil spring 33. When the magnetic head support arm 17 is rotated by the cartridge holder 11 to the neutral position, the magnetic head control shaft 31
Has been returned to the initial position side to the position where it does not contact the controlled piece 20, and does not hinder the rotation of the magnetic head support arm 17 to the second position.

In this disc recording apparatus, when the magnetic head support arm 17 is in the second position with the disc cartridge mounted, the magnetic head is removed when the disc cartridge is taken out. The support arm 17 is held at the second position as it is.

The disc recording apparatus according to the present invention is
As shown in FIG. 7, a marking portion detection arm 40, which is rotatably supported by the chassis 1 on the base end side, may be used. That is, the marking portion detection arm 40 is rotatably supported on the base end side with respect to the chassis 1 via the support shaft 41, and the tip end side is directed toward the rear side direction of the chassis 1. The marking portion detection arm 40 is rotatable so that the tip end side can be moved in the direction perpendicular to the chassis 1. The marking portion detecting arm 40 has a marking portion detecting pin 32 provided on the upper side so as to project in the middle. The sign detection pin 32 is projected above the chassis 1. A control arm portion 42 is integrally provided on the tip end side of the marking portion detection arm 40. The control arm portion 42 extends toward the upper side of the chassis 1 so as to be substantially perpendicular to the chassis 1. The magnetic head control shaft 31 is erected on the front end side of the control arm portion 42 so as to be parallel to the guide shaft 8.

The marking portion detecting arm 40 is constructed by a tension coil spring 33 stretched between a base end side position of the marking portion detecting pin 32 and a spring locking pin 39 which is erected on the chassis 1. 7 As indicated by a middle arrow E, the marking portion detection pin 32 is urged to rotate in a direction in which it is projected toward the upper side of the chassis 1.

In this disk recording apparatus, the controlled claw 38 is provided so as to project from the front side of the vertical portion of the magnetic head support arm 17. That is, in the controlled pawl 38, the magnetic head 15 has the chassis 1
When the magnetic head 15 is moved downward, it is moved downward, and when the magnetic head 15 is separated from the chassis 1 and raised, it is moved upward. In the initial state, the magnetic head control shaft 31 is supported at a position slightly above the controlled pawl 38 and spaced apart from the controlled pawl 38, as shown in FIG.

In this disc recording apparatus, when the recording / reproducing disc cartridge is mounted on the chassis 1, the marking portion detecting arm 40 is rotated against the urging force of the tension coil spring 33, and the magnetic field is detected. The head control shaft 31 presses the controlled pawl 38 downward to rotate the magnetic head support arm 17, and the magnetic head support arm 17 is set to the first position. On the other hand, in this disc recording apparatus, when the reproduction-only disc cartridge is mounted on the chassis 1, the marking portion detection arm 40 is not rotated, and the magnetic head support arm 17 is set to the second portion.
Held in position.

[0068]

As described above, in the disk recording apparatus according to the present invention, the recording medium mounted in the disk mounting portion is arranged so as to be movable in the radial direction of the disk substrate and supports the magnetic head. The magnetic head supporting member, which is movable and movable between a first position for bringing the magnetic head closer to the disk substrate and a second position for spacing the magnetic head from the disk substrate, is elastically biased. By means of the means, it is elastically biased in a direction away from a neutral position which is an intermediate position between the first position and the second position. Then, when the magnetic head control member is operated according to the marking portion of the recording medium, the magnetic head support member is moved to the first position side beyond the neutral position, and the elastic biasing means. The first position is set by the urging force of.

That is, in this disk recording apparatus, the magnetic head support member is maintained at the second position when the magnetic head control member is not operated.

When the magnetic head is moved in the radial direction of the disk substrate, the elastic biasing means is moved and moved in the radial direction of the disk substrate together with the magnetic head support member. Further, in this disc recording apparatus, when the magnetic head is moved in the radial direction of the disc substrate, the magnetic head support member and the magnetic head control member do not come into sliding contact with each other. Therefore, in this disc recording apparatus, the operation of moving the magnetic head in the radial direction of the disc substrate can be performed smoothly at high speed.

That is, according to the present invention, the sliding contact of the magnetic head with the recording medium is performed only when the information signal is written, and the abrasion of the magnetic head and the recording medium is suppressed to the minimum. At the same time, it is possible to provide a disk recording apparatus in which the operation of moving the magnetic head in the radial direction of the disk substrate of the recording medium can be performed smoothly at high speed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a disc recording apparatus according to the present invention.

FIG. 2 is a side view with a part broken away showing a state in which a disc cartridge mounting / removing operation is being performed in the disc recording apparatus.

FIG. 3 is a side view showing a state in which a magnetic head support arm is in a neutral position in the disk recording device with a part thereof cut away.

FIG. 4 is a side view partially broken away showing a state immediately after the mounting of the disc cartridge in which the information signal can be written in the disc recording device is completed.

FIG. 5 is a partial cutaway of a state in which a magnetic head is in a position in sliding contact with a disc substrate of the disc cartridge after completion of mounting of a disc cartridge capable of writing an information signal to the disc recording device. FIG.

FIG. 6 is a side view showing a partially cutaway state in which the mounting of the disc cartridge in which the information signal cannot be written to the disc recording device is completed.

FIG. 7 is a side view showing another example of the configuration of the disc recording apparatus according to the present invention with a part thereof cut away.

FIG. 8 is a perspective view showing a configuration of a disc cartridge capable of recording an information signal in the disc recording device.

FIG. 9 is a perspective view showing the configuration of a disc cartridge in which information signals cannot be recorded in the disc recording device.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ ・ Chassis 12, 13 ・ ・ ・ ・ ・ ・ Cartridge positioning pin 14 ・ ・ ・ ・ ・ ・ ・ ・ Coupling arm 15 ・ ・ ・ ・・ ・ ・ Magnetic head 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ Controlled claw 22 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Torsion coil spring 17 ・ ・ ・ ・ ・ ・ ・ ・... Magnetic head support arm 29, 40 ... Marking section detection arm 31 ... Magnetic head control shaft 32 ... Marking unit detection pin 101 ..... Recording / playback combined disk 102 .................. Recording / playback combined cartridge 107 ..................・ Recording / playback dual-purpose display unit 110 ・ ・ ・ ・ ・ ・ ・ ・ ・ Playback disc 111 ・ ・ ・ ・ ・ ・ ・ ・Ridge 112 ............ read-only indicia

Claims (1)

[Claims] 1. A disk mounting portion on which a recording medium having a disk substrate is mounted, a recording medium mounted on the disk mounting portion are arranged so as to be movable in a radial direction of the disk substrate, and a magnetic head is provided. An operation of supporting and moving the magnetic head between a first position for bringing the magnetic head close to the disk substrate of the recording medium mounted in the disk mounting portion and a second position for spacing the magnetic head from the disk substrate. The magnetic head supporting member made possible, the magnetic head supporting member, the first position and the second position.
Elastic biasing means for elastically biasing in a direction away from a neutral position which is an intermediate position of the recording medium, and the recording medium provided on the recording medium when the recording medium is mounted on the disc mounting portion. Is operated in accordance with a marking portion for indicating the type of the magnetic head supporting member, and the magnetic head supporting member in the second position is moved to the first position side beyond the neutral position by performing this operation. A disk recording device comprising a magnetic head control member for operation.