JP3343939B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and reproducing apparatus for recording and reproducing information signals by using a disk cartridge having a recording disk housed in a cartridge.

[0002]

2. Description of the Related Art Hitherto, there has been proposed a recording and reproducing apparatus for recording and reproducing information signals by using a disk cartridge or the like constituted by storing a recording disk such as a so-called magneto-optical disk or optical disk in a cartridge. .

The above-mentioned optical disk has a disk substrate made of a transparent synthetic resin material and a reflection layer made of a metal material adhered to one main surface of the disk substrate. An uneven pattern corresponding to an information signal is formed on one main surface of the disk substrate of the optical disk by means such as injection molding. This uneven pattern records the information signal. The information signal recorded by this concavo-convex pattern can be read by irradiating the concavo-convex pattern with a laser beam from the other main surface side of the disk substrate and detecting the amount of reflected laser beam.

The magneto-optical disk serving as the 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. It is configured to have. The writing of the information signal to the magneto-optical disk is performed by irradiating a converged light beam and applying an external magnetic field to a predetermined portion of the signal recording layer. The irradiation of the light beam is performed through the disk substrate from the other main surface side of the disk substrate. The application of the external magnetic field is performed from a main surface on one side of the disk substrate. The portion of the signal recording layer irradiated with the light beam loses coercive force by being heated to a so-called Curie temperature or higher. Then, the signal recording layer in the heated portion is magnetized in a direction following the direction of the external magnetic field during the cooling process.

That is, in the magneto-optical disk, while rotating the magneto-optical disk, the light intensity of the light beam or the magnetic field intensity of the external magnetic field is modulated in accordance with an information signal, so that the signal recording layer is formed. The information signal can be recorded according to the magnetization direction.

[0006] A disk device for recording information signals 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. And an optical pickup device for condensing and irradiating a light beam onto the magneto-optical disk. The magnetic head and the optical pickup device are arranged at positions facing 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. Also,
The magnetic head and the optical pickup device are arranged along 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 includes a magnetic core and a magnetic field generating coil wound around the magnetic core. The magnetic head is substantially slidably contacted with the signal recording layer via a layer made of a thin synthetic resin, oil, or the like such as a so-called protective layer or a slippery layer formed on the signal recording layer. It is arranged close to. The optical pickup device includes a light source such as a laser diode and an optical device for guiding and condensing a light beam emitted from the light source. The optical pickup device may further include a focal length of an objective lens that condenses the light beam on the signal recording layer such that a focal point of the light beam is located on a boundary surface between the signal recording layer and the disk substrate. Are disposed at a distance that is substantially equal to the distance.

In such a recording and reproducing apparatus using a magneto-optical disk as a recording medium, not only writing of an information signal to the magneto-optical disk but also reading of an information signal recorded on the magneto-optical disk are performed. Some are configured to do so. The reading of the information signal from the magneto-optical disk is performed 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 beam 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, by detecting the polarization direction of the reflected light beam, the change in the magnetization direction of the signal recording layer can be read.

[0009] The detection of the reflected light beam 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 beam into an electric signal.

[0010]

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

The sliding contact of the magnetic head with the magneto-optical disk causes wear of the magnetic head and the magneto-optical disk. In the recording / reproducing 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 magneto-optical disk is mounted, and the magnetic head is separated from the optical disk when the optical disk is mounted. Such a recording and reproducing apparatus has been proposed.

In such a recording and reproducing apparatus,
The magnetic head is supported so as to be able to approach and separate from the magneto-optical disk or the optical disk. In this recording and reproducing apparatus, the arm member supporting the magnetic head is movable in a direction of coming and going with respect to the optical pickup device, and the magnetic head is moved with respect to the magneto-optical disk. Elastically biased in the direction of approaching. When the optical disk is mounted, the arm member is held at a position where the magnetic head is separated from the optical disk by a holding member. When the magneto-optical disk is mounted, the holding by the holding member is released. The magnetic head is moved to a position where the magnetic head approaches the magneto-optical disk.

The holding member is moved according to which recording disk is mounted on the recording / reproducing apparatus. This holding member needs to hold the arm member at the time of reading the information signal, regardless of where the optical pickup device and the magnetic head are moved in the radial direction of the recording disk.
The magnetic head is provided over the movable range of the magnetic head over the inner and outer circumferences of the recording disk.

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

However, in the recording / reproducing apparatus in which the arm member is held by the holding member when the information signal is read out and the magnetic head is separated from the recording disk, the magnetic head When the optical pickup device is moved in the radial direction of the recording disk, the holding member and the arm member come into sliding contact with each other. Therefore, in this recording / reproducing apparatus, there is a possibility that the operation of moving the optical pickup device and the magnetic head in the radial direction of the recording disk cannot be performed quickly and smoothly.

Therefore, the present invention has been proposed in view of the above situation, and the magnetic head slides on a recording disk only when a recording disk capable of recording an information signal is mounted. And the wear of the magnetic head and the recording disk is minimized, and the operation of moving the magnetic head in the radial direction of the recording disk is performed at high speed without complicating the configuration. And,
It is an object of the present invention to provide a recording and reproducing device that can be smoothly performed.

[0018]

In order to solve the above-mentioned problems and to achieve the above-mentioned object, a recording and reproducing apparatus according to the present invention comprises:
A magnetic head is mounted on the distal end side, the base end side is supported by a support shaft, and the magnetic head supports the magnetic head movably in a radial direction and a contact / separation direction with respect to the recording disk of the disk cartridge mounted on the recording / reproducing unit. A disk type having a base end supported by a head support member and a spindle supporting the magnetic head support member, and capable of relative rotation about the axis of the spindle and relative sliding in the axial direction. A detection arm, a rotation restricting member for restricting relative rotation of the support shaft between the magnetic head support member and the disk type detection arm around the axis, and the recording / reproducing section of the disk type detection arm A movement restricting member for restricting the axial movement of the support shaft with respect to the disk. The disk type detection arm is configured to detect the disk type when the disk cartridge is mounted on the recording / reproducing unit. The distal end side is pressed by a disc type indicator provided on the disc cartridge, and is rotated around the axis of the support shaft to rotate the magnetic head support member. Further, the magnetic head support member is slid in the axial direction of the support shaft with respect to the disk type detection arm.

Further, according to the present invention, in the above-mentioned recording and reproducing apparatus, the rotation restricting member is a shaft attached to the magnetic head supporting member in parallel with the support shaft.

According to the present invention, in each of the above recording and reproducing apparatuses, when the disc cartridge is not mounted on the recording and reproducing section, the disc type detecting arm rotates around the support shaft. And a stopper member for releasing the restriction on the rotation of the disk type detection arm by being moved by the disk cartridge when the disk cartridge is mounted on the recording / reproducing section.

[0021]

[0022]

In the recording / reproducing apparatus according to the present invention, the base end side is supported by a support shaft for rotatably and slidably supporting the magnetic head support member, and the relative rotation and rotation of the support shaft around the support shaft are performed. When the disk cartridge is mounted on the recording / reproducing unit, the disk type detection arm, which is relatively slidable in the axial direction, can move relative to the magnetic head support member around the axis of the support shaft. The rotation is restricted by the rotation restricting member, and the axial movement of the support shaft with respect to the recording / reproducing unit is restricted by the movement restricting member. Is pressed to rotate the magnetic head support member, and does not hinder the movement of the magnetic head support member in the axial direction of the support shaft.
The rotation restricting member and the magnetic head support member are slid in the axial direction of the support shaft with respect to the disk type detection arm.

In the recording and reproducing apparatus, when the rotation restricting member is a shaft attached to the magnetic head supporting member parallel to the support shaft,
The disk type detection arm can smoothly slide in the axial direction of the support shaft.

In the recording and reproducing apparatus, when the disc cartridge is not mounted on the recording / reproducing section, the rotation of the disc type detecting arm around the support shaft is restricted, and When a stopper member is provided which is moved by the disc cartridge when the disc cartridge is mounted on the recording / reproducing section to release the regulation of the rotation with respect to the disc type detection arm, the disc cartridge is mounted on the recording / reproducing section. The rotation of the magnetic head support member is prevented when the magnetic head is not present, so that the magnetic head is prevented from being damaged by vibration, impact, or the like.

[0025]

[0026]

Embodiments of the present invention will be described below with reference to the drawings. In the recording and reproducing apparatus according to the present invention, as a disk cartridge serving as a recording medium,
Either the recording / playback disk cartridge 201 shown in FIGS. 11 and 12 or the read-only disk cartridge 211 shown in FIGS. 13 and 14 is selectively used.

The above-mentioned recording / reproducing disk cartridge 2
Reference numeral 01 denotes a recording / playback disk 205 rotatably housed in a recording / playback cartridge 202. The recording / reproducing disk 205 is a so-called magneto-optical disk, which 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. The disk substrate is formed to have a size of, for example, about 64 mm in diameter.

A chucked portion is provided at the center of the disk substrate. This chucked part is
It comprises a circular through hole 217 formed in the disk substrate and a metal plate 216 for closing the through hole 217. The through-hole 217 of the chucked portion is substantially concentric with the signal recording layer and has the center coincident with the center of curvature of a spirally formed recording track.

An annular portion around the through hole 217 on the other main surface of the disk substrate is formed so as to project and serve as a positioning reference portion 223. The metal plate 216 is disposed so as to be fitted into a concave portion 218 provided around the through hole 217 on the one main surface portion of the disk substrate, and is provided on the one main surface portion of the disk substrate. It does not protrude.

The recording / reproducing cartridge 202 includes:
It is configured in a thin housing shape large enough to accommodate the recording / playback disk 205. An opening 203 for a magnetic head is formed in the main surface portion on the upper surface side of the recording / reproducing cartridge 202 so that the main surface portion on one side of the recording / reproducing disk 205 faces the outer side over the inner and outer circumferences. ing. In addition, the recording / reproducing cartridge 20
The recording / playback disk 2 is provided on the main surface portion on the lower surface side of the disk 2.
An opening 215 for an optical pickup device is provided to expose the other main surface of the optical disk 05 to the outer side over the inner and outer peripheries. These openings 203 and 215 are formed at positions facing each other and have substantially the same size and shape. In other words, these openings 203 and 215 are respectively located on the side of the recording / reproducing cartridge 202 from the substantially center position of the main surface of the recording / reproducing cartridge 202 with respect to the mounting direction of the recording / reproducing disc cartridge 201 to the disc cartridge loading mechanism. Is formed in a substantially rectangular shape over the vicinity of the side portion of. In addition, a chucking opening 219 for allowing the chucked portion and the positioning reference portion 223 to face outward is provided at the center of the main surface portion on the lower surface side of the recording / playback cartridge 202. I have.

Then, the recording / reproducing cartridge 2
A shutter member 204 for opening and closing the openings 203 and 215 is slidably attached to 02. The shutter member 204 is formed by bending a rectangular thin plate member made of synthetic resin, metal, or the like into a U-shape, and the opening portions 203 and 2 are formed by both side portions.
15 can be closed. This shutter member 2
Reference numeral 04 denotes a central portion of the recording / reproducing cartridge 20.
The two side edges are slidably supported in the front-rear direction along the one side edge. This shutter member 204
Opens and closes the openings 203 and 215 by being slid with respect to the recording / reproducing cartridge 202.

A shutter closing operation hole 207 for closing the shutter member 204 is provided at a central portion of the shutter member 204 supported by one side edge of the recording / reproducing cartridge 202. ing.

The recording / playback cartridge 20
2, a pair of front and rear positioning holes 22
0,221 is drilled. These positioning holes 22
Nos. 0 and 221 position the recording / reproducing cartridge 202 with respect to the recording / reproducing unit of the recording / reproducing apparatus by inserting positioning pins in the recording / reproducing apparatus. At the front end side of the bottom surface of the recording / reproducing cartridge 202, a recording / reproducing / displaying unit 2 which is a disc type indicating unit is provided.
09 is provided. This recording / reproducing combined use indicator 209
Is a concave portion having a very shallow depth of about 0.7 mm and formed on the bottom surface of the recording / reproducing cartridge 202, for example.

Further, the recording / playback cartridge 2
02, the shutter member 20 from the front end side.
4 is provided with a shutter opening groove 206 extending over a central portion. In the disc cartridge loading mechanism, a shutter opening piece is inserted into the shutter opening groove 206 from the front side, whereby the shutter member 204 is inserted.
Is slid to the rear side of the recording / reproducing cartridge 202 to open the openings 203 and 215. At the center of the shutter member 204 supported by one side edge of the recording / reproducing cartridge 202, a shutter supporting projection 208 is provided to project forward along the shutter release groove 206. Have been.

The recording / playback cartridge 20
2 is provided with an erroneous insertion preventing groove 224 from the front end side on the other side edge portion opposite to the one side edge portion. In the disk cartridge loading mechanism, an erroneous insertion preventing piece is inserted into the erroneous insertion preventing groove 224 from the front side.

On the other hand, the read-only disk cartridge 211 has a read-only disk 214 rotatably housed in the read-only cartridge 212. The read-only disk 214 is configured to include a disk-shaped disk substrate made of a transparent synthetic resin or the like, and a reflective layer made of a metal material adhered to one main surface of the disk substrate. I have. This read-only disk 214
It has the same size as the recording / playback disk 205. An information signal is recorded on the main surface of one side of the disk substrate of the read-only disk 214 by forming fine irregularities by means such as injection molding. A chucked portion is provided at the center of the disk substrate. The chucked portion, like the chucked portion of the recording / playback disk 205, includes a circular through hole 217 formed in the disk substrate and a metal plate 216 for closing the through hole 217. It is configured.

The read-only cartridge 212 is formed in a thin housing large enough to accommodate the read-only disk 214. An opening 215 for an optical pickup device that opens the other main surface of the read-only disc 214 to the outside over the inner and outer circumferences is formed in the main surface on the lower surface side of the read-only cartridge 212. I have. The opening 215 for the optical pickup device is located closer to the side of the read-only cartridge 212 from the substantially central position of each main surface of the read-only cartridge 212 with respect to the mounting direction of the read-only disc cartridge 211 to the disc cartridge loading mechanism. Are formed in a substantially rectangular shape. A chucking opening 219 is provided at the center of the main surface on the lower surface side of the read-only cartridge 212 to allow the chucked portion and the positioning reference portion 223 to face outward. .

The read-only cartridge 212
A shutter member 213 for opening and closing the opening 215 for the optical pickup device is slidably mounted on the shutter. The shutter member 213 is formed by bending one end of a rectangular thin plate member made of a synthetic resin, metal, or the like, and the opening 21 for the optical pickup device is formed.
5 can be closed. This shutter member 21
Reference numeral 3 denotes a bent one end portion supported by one side edge of the read-only cartridge 212 so as to be slidable in the front-rear direction along the one side edge. The shutter member 213 opens and closes the optical pickup device opening 215 by sliding with respect to the read-only cartridge 212.

The shutter member 213 includes the shutter member 20 of the recording / playback disc cartridge 201.
4, the shutter closing operation hole 207 and the shutter support projection 208 are provided.

The read-only cartridge 212 has a pair of front and rear positioning holes 220 and 221 and a shutter opening groove 2 in the same manner as the recording / playback cartridge 202.
06 and an erroneous insertion preventing groove 224 are provided.

The read-only cartridge 212
At the front end side of the bottom surface portion, a reproduction-only indicating portion 210 which is a disc type indicating portion is provided. The read-only indicator 210 is a recess formed on the bottom surface of the read-only cartridge 212 with a depth of, for example, about 2.5 mm, which is deeper than the recording / playback indicator 209.

As shown in FIG. 1, the recording and reproducing apparatus according to the present invention includes a disk cartridge loading mechanism having a chassis 1.
The chassis 1 is made of a metal plate material or the like, and includes a chassis bottom plate portion 2 and a left side plate portion 3 and a right side plate portion which are attached to both sides of the chassis bottom plate portion 2 so as to be substantially perpendicular to the chassis bottom plate portion 2. A portion 4 is formed.

The chassis bottom plate 2 of the chassis 1 includes:
Writing and reading of information signals to / from the recording / playback disk 205 or the read-only disk 214
The recording / reproducing unit 41 for reading out the information signal is fixedly attached. As shown in FIG. 2, the recording / reproducing unit 41 includes a base 57 attached to the chassis bottom plate 2. The base portion 57 has substantially the entire upper surface facing the upper side of the chassis bottom plate portion 2 through the cutout portion 5 provided in the chassis bottom plate portion 2. A spindle motor for rotating each of the disks 205 and 214 is attached to the base 57 substantially at the center. In this spindle motor, the drive shaft 67 protrudes toward the upper surface of the base 57. A disk table 43 on which the disks 205 and 214 are mounted is attached to the tip end of the drive shaft 67. The disk table 43 is formed in a substantially disk shape, and is supported by the drive shaft 67 by fitting the drive shaft 67 into a support hole provided at the center.
On the upper surface side of the disk table 43, a centering portion 66 formed in a substantially truncated cone shape is provided at the center portion, and a peripheral portion of the centering portion 66 serves as a disk mounting portion 65. This centering part 66
Is formed to have an outer diameter that can be fitted into the through hole 217 of the chucked portion of each of the disks 205 and 214. The centering section 66 is provided with
When the positioning reference portions 223 of 5,214 are mounted on the disk mounting portion 65, the outer peripheral surface portion is formed by the through holes 2.
17 and is brought into contact with the inner edge of
4 is centered.

On the disk table 43, the metal plate 21 of the chucked portion of each of the disks 205 and 214 is provided.
A magnet for attracting 6 is attached. With this magnet, the disk table 43 positions and holds the disks 205 and 214.

On the base portion 57, a pair of positioning pins 59 and 60 are set up. These positioning pins 59 and 60 are formed in a substantially spindle shape with their distal ends reduced in diameter. These positioning pins 59, 60
Fits into the positioning holes 220 and 221 of the disk cartridges 201 and 211 mounted on the base 57, and positions the cartridges 202 and 212 with respect to the base 57.

On the base 57, a pair of front and rear positioning projections 61, 62 are erected. The positioning projections 61 and 62 come into contact with the bottom portions of the disk cartridges 201 and 211 mounted on the base portion 57, and the cartridges 2 with respect to the base portion 57.
Positioning of the height positions 02 and 212 is performed.

The optical pickup device 42 can be moved on the base portion 57 of the recording / reproducing portion 41 in the direction of coming and going to the disk table 43 as shown by the arrow C in FIGS. Mounted on

The optical pickup device 42 has an optical block portion, in which a light source such as a laser diode, a predetermined optical device for guiding a light beam emitted from the light source, and the above-mentioned disks 205 and 214 are reflected. The optical block unit has a built-in photodetector for receiving the luminous flux, and an objective lens driving device is attached to the optical block unit. In this optical pickup device, the light beam emitted from the light source is emitted from the optical block unit and made incident on the objective lens 68 supported by the objective lens driving device. This objective lens 68
Collects the incident light flux. The objective lens driving device operates to move the objective lens 68 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 42 is supported by a pair of guide shafts 69 and 70 attached to the base 57 so as to be parallel to each other, and can be operated to move in the axial direction of these guide shafts 69 and 70. Has been done. That is, each of the guide shafts 69 and 70 is inserted into a bearing hole formed in the optical block portion.

The optical pickup device 42 has the objective lens driving device facing the upper side of the base 57. In the optical pickup device 42, the optical axis of the objective lens 68 is perpendicular to the base 57, that is, perpendicular to the chassis bottom plate 2.

A magnetic head 45 is mounted on the optical pickup device 42 via a connecting arm 73. As shown in FIGS. 4 and 8, the connecting arm 73 has a base end side attached to the optical block portion of the optical pickup device 42 and extends substantially parallel to the base portion 57. Has a pair of rising bent pieces 80 and 81 for supporting the magnetic head support arm 44 serving as a magnetic head support member. The rising bent pieces 80 and 81 are formed to be bent upward from both sides of the connection arm 73, are substantially parallel to each other, and face each other. The magnetic head support arm 44 is rotatably supported at its base end by a support shaft 71 attached to the connecting arm 71 by being inserted between the rising bent pieces 80 and 81. The base portion 57 extends from the rear side to the front side. This magnetic head support arm 44
By rotating about the support shaft 71, displacement in a direction in which the front end side, that is, the free end side is brought into contact with or separated from the base 57 can be performed.

A magnetic head 45 is mounted on a side of the distal end of the magnetic head support arm 44 opposite to the base 57 via a leaf spring member 58. The magnetic head 45 is held at a position facing the objective lens 68. That is, the magnetic head 45 is positioned on the optical axis of the objective lens 68,
It is possible to move in the direction of approaching and separating from.

A pair of projecting pieces 87, 88 are provided on the base end side of the magnetic head support arm 44 so as to be inside the pair of rising bent pieces 80, 81. A rotation restricting shaft 72 serving as a rotation restricting member is inserted between and attached to the protruding pieces 87 and 88. The rotation restricting shaft 72 is connected to the support shaft 7.
1 is parallel. One end of the rotation restricting shaft 72 is inserted through one of the projecting pieces 88,
On the outer side of the projecting piece 88, one of the rising bent pieces 8 is provided.
It protrudes toward 1. The one rising bent piece 81 is provided at the upper end of the one rising bent piece 81.
Are formed to project inward, that is, toward the magnetic head support arm 44 side. One end portion of the rotation restricting shaft 72 comes into contact with the position restricting piece 89 when the magnetic head support arm 44 is rotated in a direction for separating the magnetic head 45 from the base 57. . That is,
The magnetic head support arm 44 pivots in a direction in which the magnetic head 45 is separated from the base 57 from a position where the one end portion of the rotation regulating shaft 72 abuts on the position regulating piece 89. Not done.

A torsion coil spring 74 as an elastic member is externally wound and attached to one end of the support shaft 71. The torsion coil spring 74 is interposed between the one rising bent piece 81 and the magnetic head support arm 44. This torsion coil spring 74
Presses the magnetic head support arm 44 against the other upstanding bent piece portion 80. That is,
The other rising bent piece portion 80 is a positioning member serving as a reference for the position of the magnetic head support arm 44 in the axial direction of the support shaft 71. The torsion coil spring 74 locks one of the arm portions to the base portion 57 and the other arm portion to one end of the rotation restricting shaft 72 to thereby form the magnetic head. The support arm 44 is connected to the magnetic head 45 by the objective lens 6.
8 is urged to rotate in a direction away from the reference numeral 8. Therefore, in the initial state where the respective disk cartridges 201 and 211 are not mounted, the magnetic head support arm 44 makes one end portion of the rotation restricting shaft 72 abut on the position restricting piece 89, and FIGS. As shown in FIG. 5, the initial position is such that the magnetic head 45 is separated from the objective lens 68.

The rotation restricting shaft 72 has
A midway portion of the disk type detection arm 78 is attached. The disc type detection arm 78 is inserted into the insertion hole 82 provided in the middle part so that the rotation restricting shaft 72
It is mounted so that it can rotate around an axis and slide in the axial direction. An engagement notch 83 for engaging with the support shaft 71 is provided on the rear end side of the disc type detection arm.
Is provided. The engagement notch 83 is engaged with the support shaft 71 through the support shaft 71. That is, the disk type detection arm 78 is connected to the support shaft 7.
In contrast to 1, a rotation around an axis and a sliding in an axial direction are enabled. Therefore, the disc type detection arm 78 is connected to the support shaft 71 and the rotation restricting shaft 72.
Supported by the magnetic head support arm 4
The rotation of the support shaft 71 around the shaft 4 with respect to the shaft 4 is restricted.

Then, the disk type detection arm 78
On the front end side, an abutment projection 79 protrudes upward and a locked projection 84 protrudes forward.

On the base 57, a pair of movement restricting pieces 85 and 86 serving as movement restricting members are provided in a protruding manner. These movement restricting pieces 85 and 86 are formed so as to sandwich the front end portion of the disc type detection arm 78 from both sides. These movement restricting pieces 85, 86
Prevents the disk type detection arm 78 from moving in the axial direction of the support shaft 71 with respect to the base 57.

As shown in FIGS. 2, 3 and 8, a stopper arm 7 serving as a stopper member is provided on the base 57.
5 are provided. The stopper arm 75 is rotatably supported at an intermediate portion thereof via a support shaft 77 with respect to a rear portion of the base portion 57. This stopper arm 7
5 has a cartridge contact pin 76 on the upper surface on one end side. The stopper arm 75 is rotationally urged by an urging member such as a coil spring (not shown) in a direction to move the cartridge contact pin 76 forward as shown by an arrow S in FIG. Positioned. At this time, the other end of the stopper arm 75 is connected to the locked projection 84 of the disc type detection arm 78.
, That is, between the locked projection 84 and the base 57. In this state, the disc type detection arm 78 is prevented from rotating toward the base 57 by the contact between the locked projection 84 and the stopper arm 75. That is, at this time, the rotation of the magnetic head support arm 44 in the direction of approaching the magnetic head 44 to the base 57 from the initial position is prevented via the disk type detection arm 78.

Then, the cartridge contact pin 76
As shown in FIG. 3, when the disk cartridges 201 and 211 are mounted on the base 57, the disk cartridges 201 and 211 come into contact with the front ends of the disk cartridges 201 and 211 and are moved rearward. As shown by the middle arrow T, the stopper arm 75 is rotated. At this time, the other end of the stopper arm is moved forward from the lower side of the locked projection 84 to release the regulation of the rotation of the disc type detection arm 78.

The magnetic head support arm 44 is mounted on the base 57 so that the recording / reproducing disk cartridge 2
01, the disc type detection arm 78
The contact projection 79 is pressed by the bottom of the recording / reproducing indication portion 209 and is rotated about the support shaft 71, and the magnetic head 45 is slid on the recording / reproducing disk 205 as shown in FIG. To the first position. Further, the magnetic head support arm 44 is mounted on the base 57.
When the read-only disc cartridge 211 is mounted on the read-only disc cartridge 211,
Is pressed by the bottom of the shaft and rotated about the support shaft 71,
As shown in FIG. 6, the magnetic head 45 is moved toward the read-only disk 214 relative to the initial position.
The second position is separated from the second position.

As shown in FIG. 1, each of the disk cartridges 201,
A cartridge holder 26 for holding the disk cartridges 201 and 211 when the insertion operation of the disk cartridge 211 is performed from the front side is provided. The cartridge holder 26 is supported by a cartridge pressing plate 27. The cartridge holding plate 27 is provided with the disk cartridge 20.
It has a plate-shaped main surface having substantially the same size and shape as the main surfaces 1 and 211, and side walls hanging down from both sides of the main surface, and is formed of a metal plate or the like. The cartridge holding plate 27 is disposed on the chassis bottom plate portion 2, and a rear portion of each side wall portion is attached to the chassis bottom plate portion 2.
And is rotatably supported with respect to the chassis bottom plate 2.
It is made to be able to approach and separate from. A plurality of leaf spring portions 27a for pressing and supporting the cartridges 202 and 212 downward are formed on the cartridge pressing plate 27 by cutting and raising.

The cartridge holder 26 has a front side, an upper surface, and a housing having a size substantially corresponding to the cartridges 202 and 212 so that the cartridges 202 and 212 can be inserted from the front side. A part of the lower surface is opened. The cartridge holder 26 is disposed on the lower surface side of the cartridge holding plate 27 so as to be substantially along the cartridge holding plate 27, and the both side portions on the rear side can be pivoted to the middle portion of the cartridge holding plate 27. It is supported by. That is, the cartridge holder 26 can be moved toward and away from the cartridge holding plate 27, and when the cartridge holding plate 27 rotates toward the chassis bottom plate portion 2, the cartridge holding plate 2
7 and the chassis bottom plate 2.

When the disc cartridges 201 and 211 are inserted into the cartridge holder 26 from a front side in a predetermined direction, the cartridge holder 26
The shutter release piece provided inside the shutter release groove 2
Enter into 06. When the disk cartridges 201 and 211 are moved inward of the cartridge holder 26 and the shutter release piece abuts on the front end of the shutter support projection 208, the shutter cartridge is provided on the cartridge holder 26. A shutter closing piece fits into the shutter closing operation hole 207. When the disk cartridges 201 and 211 are further inserted inside the cartridge holder 26, the shutter members 204 and 213 cause the front end of the shutter support projection 208 to be engaged with the shutter release piece. Since the cartridge 20 is stopped at the contact position, the cartridge 20
2, 212, each of the openings 20
3, 215 is opened.

A disk tray 30 is provided on the chassis bottom plate 2. The disk tray 30 includes a receiving plate 39 on which the disk cartridges 201 and 211 are placed, and a frame that supports the receiving plate 39 so as to be vertically movable. The receiving plate 3
Reference numeral 9 has a shape and a size substantially equal to the main surface portions of the disk cartridges 201 and 211, and is formed of a thin metal plate or the like. The receiving plate 39 has a plurality of openings. These openings are provided in the receiving plate 3
When the disk cartridges 201 and 211 are mounted on the
1, an opening 215 for the optical pickup device, an opening 219 for chucking, a positioning hole 220, and each marking portion 20.
9, 210, etc., to face the lower side of the receiving plate 39.

The frame portion is made of a material such as synthetic resin and has a linear portion located on the front end side of the receiving plate 39 and linear portions located on both sides of the receiving plate 39. It is formed to have a U-shape. That is, the rear side of the frame is open. The length of the frame portion in the front-rear direction is substantially twice the length of the main surface portions of the disk cartridges 201 and 211 in the front-rear direction. Rear end portions of both side portions of the frame portion are connected to each other via a connecting plate 31. The connecting plate 31 is formed of a material such as a thin metal plate, and is attached to the upper surface of the frame.

The frame supports the receiving plate 39 so as to be movable in the vertical direction. A pair of support pins 145 and 146 are implanted on both sides of the upper surface of the receiving plate 39. The support pins 145 and 146 are fitted into a pair of support holes provided on both side portions of the frame portion from below correspondingly. The receiving plate 39 is configured to be vertically movable with the support pins 145 and 146 along the support holes. This receiving plate 39
The front edge is near the front linear portion of the frame. The receiving plate 39 is elastically urged upward by a spring disposed in the frame.

In order to facilitate the loading and unloading of the disk cartridges 201, 211 mounted on the receiving plate 39, the frame portions correspond to both side portions of the disk cartridges 201, 211. A pair of cutouts 32 and 33 are provided at the positions to expose parts of both sides of the disk cartridges 201 and 211 to the outside.

The disk tray 30 is disposed on the chassis bottom plate 2 and allows the disk cartridges 201 and 211 mounted on the receiving plate 39 to read / write the disk cartridges 201 and 211.
And the position of the disk cartridge 20
It can be moved between the attachment and detachment operation positions 1 and 211. That is, the guide member 34 is attached to one side of the frame 30. This guide member 34
Is formed of a material such as synthetic resin and has a shaft insertion hole 35, is attached to the frame, and protrudes from the frame in one side direction. The guide shaft 29 attached to the left side plate 3 is inserted through the shaft insertion hole 35 of the guide member 34. The front end of the guide shaft 29 is supported by a shaft supporting portion formed by bending a front end portion of the left side plate portion 3 outward, and is provided at a rear end portion of the left side plate portion 3. The rear end side is supported by the shaft support portion, extends in the front-rear direction, and is attached to the left side plate portion 3. On the other side of the frame, a guide ridge 139 is provided so as to project in the front-rear direction. The guide ridge 139 is slidably supported by an upper portion of the right side plate 2. The disc tray 30 is slidable in the front-rear direction along the guide shaft 29 and the guide ridge 139.

This disc tray 30 is indicated by an arrow B in FIG.
When the receiving plate 39 is moved to the rear side, ie, the loading position where the receiving plate 39 is located above the recording / reproducing unit 41, and when the receiving plate 39 is moved to the front side, which is the direction of arrow A in FIG. The position 39 projects to the front side of the chassis 1, and the unloading position allows the disk cartridges 201 and 211 to be attached to and detached from the receiving plate 39.

The disc tray 30 is moved by a cam gear 28 which is rotated by a loading motor mounted on the left side plate 3. This cam gear 28 is a gear in which the outer peripheral gear portion is formed on the outer peripheral side and a first cam groove is formed on one main surface portion. The outer peripheral gear portion is formed with a toothless portion that is substantially half of the entire width of the outer peripheral gear over an angle range of approximately 90 °.

On the other hand, on the bottom surface of the frame portion, a portion of the outer peripheral gear portion of the cam gear 28 which is substantially half of the entire width of the outer peripheral gear portion, that is, a portion corresponding to the portion where the missing tooth portion is formed. And a rack gear that meshes with the rack gear. That is, when the cam gear 28 rotates, the frame portion is moved within a rotation range of approximately 270 ° of the cam gear 28, that is, within a range where the outer peripheral gear portion meshes with the rack gear. And this frame part
No movement operation is performed within a rotation range of approximately 90 ° of the cam gear 28, that is, within a range in which the toothless portion faces the rack gear.

The cam gear 28 is provided not only in the disk tray 30 but also in the cartridge holding plate 2.
7 is also moved. The operation of moving the cartridge pressing plate 27 by the cam gear 28 is performed by rotation of the toothless portion within an angle range of approximately 90 ° facing the rack gear of the frame portion.

That is, the cartridge holding plate 27
Are engaged with the first cam groove via a driven arm (not shown). That is, when the cam gear 28 is rotated, the cartridge pressing plate 27 is rotated with respect to the chassis bottom plate 2.

The chassis 1 is mounted in a so-called floating manner with respect to a support substrate 18 fixedly disposed in an outer casing of the recording and reproducing apparatus. That is, the chassis 1 includes the support substrate 1
8, four tension coil springs 6, 7, 8, 9
And four dampers 22, 23, 24, 25. These dampers 22, 23, 24, 25
A liquid material having high viscosity is sealed in a bag-like member made of a flexible material such as rubber.

In the recording / reproducing apparatus according to the present invention configured as described above, to mount the recording / reproducing disk cartridge 201 or the reproduction-only disk cartridge 211, first, the disk tray 30 must be Make the unloading position. At this time,
The cartridge holding plate 27 is held at a position separated from the chassis bottom plate 2, and separates the cartridge holder 26 from the chassis bottom plate 2. In this state, the disk cartridges 201 and 211 are placed on the receiving plate 39.

When the cam gear 28 starts rotating by the loading motor, the disc tray 30 is moved rearward as shown by the arrow B in FIG. When the disc tray is further moved rearward, the disc cartridges 201 and 21 are displaced.
1 is inserted into the cartridge holder 26 from the front side. Then, the disk cartridges 201,
11, the shutter members 204 and 213 are
The cartridge 202,
212, the opening 215 for the optical pickup device or the opening 203 for the magnetic head.
Then, the opening 215 for the optical pickup device is opened. At this time, the shutter closing piece fits into the shutter closing operation hole 207. Until this time,
The magnetic head support arm 44 is at an initial position for holding the magnetic head device 45 at a raised position as shown in FIGS.

When the disc tray 30 reaches the loading position, the toothless portion opposes the rack gear of the disc tray, and the disc tray 30 remains stopped even if the cam gear 28 further rotates. Will be maintained. At this time, the disk cartridge 201,
As shown in FIG. 5, 211 is conveyed to a position above the recording / reproducing unit 41. At this time, the arrow U in FIG.
The distance between the bottom of the disk cartridges 201 and 211 and the disk table 43 is a sufficient distance of, for example, about 4 mm.

When the cam gear 28 further rotates, the cartridge holding plate 27 is rotated by the first cam groove to the side close to the chassis bottom plate 2. Then, the disk cartridges 201, 21
1 is, as shown in FIG. 6 and FIG.
Is mounted on the base portion 57 to complete the loading operation. These disk cartridges 201,
The 211 is elastically pressed and supported on the base 57 side by each leaf spring portion 27a of the cartridge pressing plate 27. The receiving plate 39 is pressed by the disk cartridges 201 and 211 and is moved downward with respect to the frame. The cartridges 202 and 21
2 is positioned at a predetermined position on the base 57 by the positioning pins 59 and 60 and the positioning projections 61 and 62.

Then, the magnetic head support arm 44
In the case where the recording / playback disk cartridge 201 is mounted, as shown in FIG.
And the read-only disc cartridge 2
When 11 is mounted, as shown in FIG.
The first position is set. In addition, each of the disks 20
5, 214 are positioned and mounted on the disk table 43. At this time, the spindle motor can rotate the disks 205 and 214 together with the disk table 43.

In this state, in the optical pickup device 42, the objective lens 68 is opposed to the main surface on the other side of the recording / reproducing disk 205 or the reproduction-only disk 214. In addition, the optical pickup device 42 includes the above-described disks 205,
With the objective lens 68 facing the 214, the disks 205 and 214 can be moved over the inner and outer circumferences. The optical pickup device 42 can irradiate the discs 205 and 214 with a light beam from the other main surface side. The optical pickup device 42 is connected to each of the disks 205 and 21.
When the disk type detection arm 78 is moved in the radial direction over the inner and outer circumferences of the disk 4, the respective movement restricting pieces 85, 86
As a result, the axial movement of the support shaft 71 is prevented, so that the support shaft 71 remains at a fixed position. At this time, the support shaft 71 and the rotation restricting shaft 72 are moved together with the magnetic head support arm 44, and slide in the axial direction with respect to the disk type detection arm 78.

Here, when the spindle motor, the optical pickup device 42 and the magnetic head device 45 are operated, the recording / playback disk 205 is operated.
The information signal can be written to the data. That is, the recording / reproducing disk 205 is rotated, and the signal pickup layer of the recording / reproducing disk 205 is condensed and irradiated by the optical pickup device 42 to heat the irradiated area. The information signal is written by the magnetic head device 45 applying an external magnetic field to the portion. Further, in this state, the reading of the information signal from the reproduction-only disk 214 is enabled. That is, the read-only disc 214 is rotated, and the light flux is condensed and irradiated on the reflective layer by the optical pickup device 42.
By detecting a reflected light beam of the light beam, reading of an information signal is performed.

Then, in order to take out each of the disk cartridges 201 and 211 mounted on the recording / reproducing section from the recording / reproducing apparatus as described above, the cam gear 28
Is rotated in the direction opposite to the above-described loading operation, and is rotated in a direction in which the disc tray is transported forward. Then, the cartridge pressing plate 27 is rotated in a direction away from the chassis bottom plate portion 2 to move the cartridge holder 26 above the chassis bottom plate portion 2. At this time, the disk cartridge 20
The reference numerals 1 and 211 are separated from the base 57 of the recording / reproducing unit 41 and mounted on the receiving plate 39. Further, the magnetic head support arm 44 returns to the initial position as shown in FIG. 5 by the urging force of the torsion coil spring 74.

When the cam gear 28 is further rotated, the disc tray 30 is moved forward. At this time, the disk cartridges 201 and 211 are transported forward while being placed on the receiving plate 39. At this time, in the disk cartridges 201 and 211, the shutter closing pieces of the shutter members 204 and 213 are operated by the shutter closing pieces. Further, the cam gear 28 is rotated,
When the disc tray 30 reaches the unloading position, the disc cartridges 201 and 211
It can be removed from the disc tray 30.

In the recording / reproducing apparatus according to the present invention, the rotation restricting member for restricting the rotation of the disc type detection arm 78 with respect to the magnetic head support arm 44 is provided as a rotation control member as shown in the above embodiment. Motion control shaft 72
It is not limited to. That is, as shown in FIG. 10, the rotation restricting member includes the magnetic head support arm 4 as shown in FIG.
4, a pair of rotation restricting pieces 91 and 92 protruding from the disk type detection arm 78 may be used. Also in this case, arrows X and Y in FIG.
When the disk type detection arm 78 is rotated around the support shaft 71, the relative rotation between the disk type detection arm 78 and the magnetic head support arm 44 is blocked. Therefore, the magnetic head support arm 44 is rotated following the disk type detection arm 78.

[0085]

As described above, in the recording / reproducing apparatus according to the present invention, the base end is supported by the support shaft which supports the magnetic head supporting member so as to be relatively rotatable and relatively slidable. The disk type detection arm, which is capable of rotating around the support shaft and sliding in the axial direction, rotates relative to the magnetic head support member around the support shaft. The movement of the support shaft with respect to the recording / reproducing unit in the axial direction is regulated by the movement regulating member.

For this reason, when the disk cartridge is mounted on the recording / reproducing unit, the disk type detecting arm is pressed at the distal end by the disk type indicator provided on the disk cartridge, and rotates the magnetic head support member. Operating, and without obstructing the movement of the magnetic head support member in the axial direction of the support shaft, the support shaft, the rotation restricting member and the magnetic head support member are moved relative to the disk type detection arm. The shaft is slid in the axial direction of the support shaft.

In this recording / reproducing apparatus, if the rotation restricting member is a shaft attached to the magnetic head supporting member parallel to the support shaft, the rotation control member is provided on the support shaft of the disk type detection arm. The sliding in the axial direction can be performed smoothly.

In these recording / reproducing apparatuses, when the disc cartridge is not mounted on the recording / reproducing section, the rotation of the disc type detection arm around the support shaft is regulated, and When a stopper member is provided which is moved by the disc cartridge when the disc cartridge is mounted on the recording / reproducing portion and releases the regulation of the rotation with respect to the disc type detecting arm, the disc cartridge is not mounted on the recording / reproducing portion. The rotation of the magnetic head support member can be prevented, and the magnetic head can be prevented from being damaged due to vibration or impact.

[0089]

That is, according to the present invention, the magnetic head is brought into sliding contact with the recording disk only when a recording disk capable of recording information signals is mounted, and the magnetic head and the recording disk A recording and reproducing apparatus capable of moving the magnetic head in the radial direction of the recording disk at a high speed and smoothly without complicating the configuration while minimizing wear of the recording head. That can be provided.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of a recording and reproducing apparatus according to the present invention.

FIG. 2 is a plan view showing a configuration of a recording / reproducing unit of the recording / reproducing apparatus.

FIG. 3 is a plan view showing a state where a disk cartridge is mounted on the recording / reproducing unit.

FIG. 4 is a side view showing a configuration of the recording / reproducing unit and a disk cartridge mounted on the recording / reproducing unit.

FIG. 5 is a side view showing a state where the disk cartridge is being mounted on the recording / reproducing unit.

FIG. 6 is a side view showing a state where a read-only disk cartridge is mounted on the recording / reproducing section.

FIG. 7 is a side view showing a state in which a recording / reproducing disk cartridge is mounted on the recording / reproducing unit.

FIG. 8 is an enlarged perspective view showing a configuration of a main part of a magnetic head support arm of the recording / reproducing unit, with a part thereof cut away.

FIG. 9 is an enlarged plan view showing a configuration of a main part of the magnetic head support arm with a part thereof cut away.

FIG. 10 is an enlarged side view showing another example of the configuration of the main part of the magnetic head support arm.

FIG. 11 is a perspective view showing a configuration of the disk cartridge for both recording and reproduction.

FIG. 12 is a perspective view of the recording / reproducing disk cartridge facing the bottom side.

FIG. 13 is a perspective view showing a configuration of a read-only disk cartridge.

FIG. 14 is a perspective view of the read-only disk cartridge as viewed from the bottom side.

[Explanation of symbols]

41 Recording / playback unit 44 ... Magnetic head support arm 57 ... Base 71 ... ········· Support shaft 72 ········· Rotation control shaft 74 ······ ............ Torsion coil spring 75 ..... Stopper arm 78 ... ... Disc type detection arm 79・ Abutment projections 80, 81 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Start-up bending pieces 85, 86 ・ ・··················································································· Disc cartridge ··················································· ······································································································· ...... Reproduction-only disc cartridge 214

Claims (3)

(57) [Claims] 1. A recording / reproducing unit on which a disk cartridge is mounted, a magnetic head mounted on a distal end side, and a disk cartridge mounted on the recording / reproducing unit with the magnetic head mounted on a support shaft on a base end side. a magnetic head supporting member for moving operably supported in the radial direction and contact and separation direction relative to the recording disk is supported a base end side by a support shaft for supporting the magnetic head supporting member, relative to the support shaft about the axis A disk type detection arm capable of accurate rotation and relative sliding in the axial direction, and a relative rotation of the support shaft about the axis between the magnetic head support member and the disk type detection arm. And a movement restricting member for restricting the axial movement of the support shaft with respect to the recording / reproducing section of the disk type detecting arm. When a disk cartridge is mounted on the recording / reproducing section, the distal end side is pressed by a disk type indicating section provided on the disk cartridge, and is rotated around the axis of the support shaft. By rotating a support member, the support shaft, the rotation restricting member, and the magnetic head support portion
The material is on the support shaft with respect to the disc type detection arm.
A recording and reproducing apparatus characterized by being slid in an axial direction . 2. The recording and reproducing apparatus according to claim 1, wherein the rotation restricting member is a shaft which is parallel to the support shaft and is attached to the magnetic head supporting member. 3. The recording / reproducing section regulates the rotation of the disc type detection arm around the support shaft when the disc cartridge is not mounted on the recording / reproducing section, and the disc cartridge is mounted on the recording / reproducing section. recording and movement are operated or claim 1, characterized in that that have a stopper member is provided to release the regulation of rotation with respect to the disc type detection arm, according to claim 2, wherein the said disc cartridge when it is Playback device.