JPH05109138A - Recording and/or reproducing device - Google Patents

Abstract

PURPOSE:To thin a device by making a size small in a vertical direction with respect to a chassis by supporting a magnetic field generator to the disk movably in the direction of the diameter of the disk. CONSTITUTION:A magnetic head device 5 has a magnetic head 20 provided with a magnetic field generating coil impressing the specified strength of a magnetic field on a signal recording layer of the disk and the head 20 is fixed to a magnetic head supporting member 21 attached to a cartridge holder 35 transferably. The member 21 is arranged proximately to the disk of the disk cartridge inserted into a holder 35 and the head 20 is held at a height position capable of impressing the magnetic field on the signal recording layer of the disk. The device 5 together with the holder 35 is moved in a direction attached/ detached to/from the chassis 6. Also the member 21 is moved in a diameter direction over the inner and outer peripheries 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 recording and / or reproducing apparatus for recording and / or reproducing an information signal on a disc as a recording medium.

[0002]

2. Description of the Related Art Conventionally, a disk such as a magneto-optical disk has been proposed which is constructed so that information signals can be written and read and which is used as a recording medium for information signals.

The magneto-optical disk has a disk substrate and
A signal recording layer made of a magnetic thin film capable of perpendicular magnetization is formed on the disk substrate.
The signal recording layer is heated to a Curie temperature or higher by irradiation with a laser beam, and the direction of magnetization is reversed by application of an external magnetic field to write an information signal. Further, the information signal written in the signal recording layer irradiates the surface portion of the signal recording layer with a linearly polarized light beam such as a laser beam, and the polarization direction due to the so-called Kerr effect generated when the light beam is reflected on the surface portion. Is detected and the difference in the magnetization direction is determined and read.

In order to write and / or read an information signal to / from such a disc, a recording having an optical pickup device for irradiating a light flux and a magnetic head device for applying an external magnetic field is performed. And / or a playback device is used. The optical pickup device is configured to irradiate one main surface portion of the disc with a focused laser beam and detect reflected light of the laser beam from the disc. The magnetic head device is configured to apply a magnetic field to the signal recording layer of the disk.

In this recording and / or reproducing apparatus,
The disk is held and rotated by a rotation operation device, and the optical pickup device and the magnetic head device are moved in the radial direction of the disk over the inner and outer circumferences of the disk, thereby Information signals are written and / or read over substantially the entire surface.

By the way, in order to prevent scratches and stains due to dust adhesion, finger contact, etc. when the disc is not used, as shown in FIG.
A disk cartridge 201 has been proposed which is configured by housing 2 in a cartridge 203. The cartridge 203 stores the disc 202,
It has a thin housing shape. That is, the main surface portion of the cartridge 203 has a substantially rectangular shape having a side slightly longer than the diameter of the disc 202. The thickness of the cartridge 203 is slightly thicker than that of the disc 202.

The cartridge 203 has a recording / reproducing opening 206 for allowing the optical pickup device and the magnetic head device to face the disk, and a rotating operation of the recording and / or reproducing device. A chucking opening is provided to allow the device to hold the disc. In addition, the cartridge 203 is provided with the openings described above, and
A shutter member 214 for closing the lid when not in use and opening the lid during use is attached.

A recording and / or reproducing apparatus configured to record and / or reproduce an information signal using such a disc cartridge 201 has a cartridge insertion slit portion into which the disc cartridge 201 is inserted and operated. is doing. The disc cartridge 201 inserted into the cartridge insertion slit portion is held by a cartridge holder provided on the inner side of the cartridge insertion slit portion, so-called loading operation is performed, and the disc cartridge 201 is transported to the loading position.

The loading position is a position which is parallel to the chassis of the recording and / or reproducing apparatus in which the optical pickup device and the rotation operation device are arranged and which is close to the chassis by a predetermined distance. .. That is, the disc 202 of the disc cartridge 201 at the loading position is a position where the information signal can be written and / or read by the optical pickup device or the magnetic head device. The disc cartridge 201 is transferred to the chassis and moved to the loading position.

In the recording and / or reproducing apparatus having the cartridge holder, the magnetic head device allows the disk cartridge 201 to move in the direction in which the disk cartridge 201 approaches the chassis. 1
As shown in FIG. 8, it is supported so as to be movable in the contacting / separating direction with respect to the chassis 306.

That is, the magnetic head device 320 is
It is attached to a magnetic head block 321 supported by a lifting frame 323 via a pair of support shafts 327 and 328. The elevating frame 323 is a pair of elevating guide shafts 32 vertically installed on the chassis 306.
As shown by an arrow D in FIG. 18, it is supported by 5, 326 so as to be movable in the contacting / separating direction with respect to the chassis 306. Then, the magnetic head block 321 is along the pair of support shafts 327 and 328 with respect to the elevating frame 323 as indicated by an arrow E in FIG.
The disk 202 supported by the rotary operation device is supported so as to be movable in the radial direction.

The elevating frame 323 is movable in the ascending / descending direction with respect to the chassis 306 by a cam member 324 rotatably arranged on the chassis 306 via a support shaft 331. The cam member 324
Is formed into a substantially fan-shaped plate shape, is supported by the support shaft 331 at a position corresponding to the center of the fan, and has an end face cam 333 on the peripheral edge portion. This end face cam 333
Is a copy pin 32 provided on the lifting frame 323.
It is in contact with 9. The end surface cam 333 has an inclined portion. That is, in the elevating frame 323, when the cam member 324 is rotated, the copying pin 329 is moved following the end surface cam 333, and the magnetic head device 320 is moved toward and away from the chassis 306. To move.

The magnetic head device 320 is retracted to a position where it does not come into contact with the disc 202 separated from the chassis 306 until the disc cartridge 201 reaches the loading position. When it is set to the loading position, it is moved to a direction approaching the chassis 306 and brought into a position where it substantially comes into contact with the disk 202.

[0014]

By the way, as described above, in the recording and / or reproducing apparatus constituted by supporting the magnetic head device 320 to the chassis 306 so as to be able to contact and separate from the chassis 306, the elevating frame 323 is used. Also, since it is necessary to provide the elevating guide shafts 325, 326 and the like, it is difficult to downsize the device configuration. In particular, it is difficult to reduce the thickness of the device, which is the size in the vertical direction with respect to the chassis 306.

Therefore, the present invention has been proposed in view of the above-mentioned conventional circumstances, and it is possible to reduce the size of the device structure, particularly to reduce the size in the vertical direction with respect to the chassis to reduce the thickness. It is an object of the present invention to provide a recording and / or reproducing device that has been made.

[0016]

In order to solve the above problems and achieve the above objects, a recording and / or reproducing apparatus according to the present invention is a recording medium capable of writing an information signal by applying a magnetic field. A holder member for holding a disc and transferring the disc to a loading position where information signals can be written and / or read on the disc;
And a magnetic field generator that is supported by the holder member so as to be movable in the radial direction of the disk and applies a magnetic field to the disk held by the holder.

In the recording and / or reproducing apparatus according to the present invention, in the recording and / or reproducing apparatus, the holder member is provided with a position regulating means provided on the chassis when the disc is at a loading position. The position is regulated.

[0018]

In the recording and / or reproducing apparatus according to the present invention, a disc, which is a recording medium capable of writing an information signal by applying a magnetic field, is held and the disc is used for writing an information signal and / or to the disc. The holder member that moves to the readable loading position supports a magnetic field generator that applies a magnetic field to the disc so that the magnetic field generator can be moved in the radial direction of the disc. It is supported so that it is always at a predetermined distance.

In this recording and / or reproducing apparatus, when the holder member is position-regulated by the position-regulating means provided on the chassis when the disc is at the loading position, the holder member is supported by the holder member. The generated magnetic field generator is set at a predetermined position with respect to the disc in the direction along the main surface portion of the disc.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. [1] Configuration of Disc Cartridge (FIG. 17) A disc used as a recording medium in the recording and / or reproducing apparatus according to the present invention is rotatably housed in a cartridge 203 as shown in FIG. Is composed of.

The above-mentioned disc 202 is a so-called magneto-optical disc, and a signal recording layer is adhered and formed on one main surface portion thereof. This signal recording layer is designed so that information signals can be written and read by optical and magnetic means. The main surface of the disc 202 on the other side is a signal recording surface. A chucking hub portion 202a for being chucked by the recording and / or reproducing apparatus according to the present invention is provided in the center portion of the other main surface portion of the disc 202.

The cartridge 203 is formed into a thin casing having a size such that the disc 202 can be housed inside. The cartridge 203 is composed of a pair of an upper half 205 and a lower half 204, and the upper half 205 and the lower half 204 are abutted and coupled to each other. The disk 202 is rotatably housed in the cartridge 203.

The lower half 204 constituting the cartridge 203 has a chucking hub portion 202a provided at the center of the disk 202 and the cartridge 2
A first opening 206 for opening a part of the signal recording surface of the disk 202 housed in the disk 03 outward and outward is provided. This first opening 206
Is formed in the lower main surface portion 212 of the cartridge 203 as a long hole extending from the front surface portion 209 side of the cartridge 203 to the central portion.

The first opening 206 is a disk of a rotary operation device that rotates the chucking hub portion 202a of the disk 202 when the disk cartridge 201 is mounted in the recording and / or reproducing apparatus. While facing the table, the signal recording surface of the disk 202 is made to face an optical pickup device that irradiates the signal recording surface with a laser beam.

On the other hand, a second opening is formed in the upper half 205 at a position opposite to the first opening 206 provided in the lower half 204. The second opening is provided at a position close to the front surface 209 side of the cartridge 203, and a part of the main surface portion on one side of the disc 202 is exposed outward along the inner and outer circumferences in the radial direction. It is formed as a rectangular shape that is large enough to fit in. Then, the second opening is formed in the disc cartridge 2
When 01 is mounted on the recording and / or reproducing apparatus, one main surface portion of the disk 202 is exposed to the magnetic head apparatus.

The front surface 2 of the cartridge 203 is
09 near the first opening 206 and the second opening 206.
Since the magnetic head device and the optical pickup device can enter the inner side of the cartridge 203 while being closely opposed to the main surface portions of the disk 202, a portion corresponding to the opening of Recess 206
a and 210a are provided respectively. That is, the thickness of the central portion of the cartridge 203 in the vicinity of the front surface portion 209 is thin in the portions corresponding to the first opening portion 206 and the second opening portion.

A shutter member 211 for opening and closing the first opening 206 and the second opening is slidably attached to the cartridge 203. The shutter member 211 is disposed in parallel to the first shutter plate portion 212 that closes the first opening portion 206 of the lower half 204, and is opposed to the first shutter plate portion 212 in parallel with the first shutter plate portion 212. Second shutter plate part 213 that closes the second opening of the second shutter plate part 213, and a connecting piece part 214 that connects the base end sides of the first and second shutter plate parts 212 and 213.
Consists of.

The first shutter plate portion 212 is formed in a rectangular shape which is narrow and long enough to close the first opening portion 206 of the lower half 204. This first
The front side of the shutter plate portion 212 of the
It is supported by a shutter pressing plate 215 attached to the outer side surface of the cartridge and is prevented from rising from the cartridge 203. Further, the first shutter plate portion 21
The first engaging claw for engaging with the first slide guide groove 216 engraved on the outer surface of the lower half 204 is provided on the base end side which is a continuous portion of the second connecting piece portion 214. 217
It is bent and formed toward the second shutter plate portion 213 side. On the other hand, the second shutter plate portion 213 is formed in a rectangular shape large enough to close at least the second opening portion.

Then, the respective shutter plate portions 212 and 21
The connecting piece portion 214 for connecting 3 is the cartridge 20.
It has a width substantially equal to the thickness of No. 3. The connecting piece portion 214 is the front surface portion 20 of the cartridge 203.
9 so that the shutter member 211 can be stably moved and operated. Then, when the shutter member 211 is slid on the connecting piece portion 214 to open the first opening portion 206 and the second opening portion, the notch concave portions 206a and 210a are formed on the front side. So as to face the recesses 206a, 210
A pair of notches is formed so as to correspond to a. Therefore, the narrow portion of the connecting piece portion 214, which is the portion where the cutout portions are formed, is the disk 20 of the magnetic head device and the optical pickup device.
The cartridge 20 in the state of closely facing 2
It is possible to enter the inside of 3.

Further, one side edge portion of the connecting piece portion 214, which is a side connected to the first shutter plate portion 212, is
A slide guide claw 219 formed to extend in the same direction as the first shutter plate portion 212 is provided. A tip end side of the slide guide claw 219 is formed to be bent toward the second shutter plate portion 213 side, and a second slide guide groove 216 is formed in parallel with the first slide guide groove 216 on the outer side portion of the lower half 204. It is engaged with the slide guide groove 220. That is, the shutter member 211 has the first
By engaging the first and second engaging claws 217 and 219 with the first and second slide guide grooves 216 and 220, the front surface portion 2 of the cartridge 203 is slid in the sliding direction.
The cartridge 203 is regulated so as to comply with 09 and is prevented from coming off from the cartridge 203.

Further, the connecting piece portion 214 is provided with a spring engaging piece 222 for engaging one end side of a torsion coil spring (not shown) arranged in the cartridge 203. The torsion coil spring constantly urges the shutter member 211 in a direction to close the first opening 206 and the second opening. The spring locking piece 222 is bent toward the inside of the cartridge 203 so as to be substantially parallel to the first and second shutter plate portions 212 and 213, and the twisted portion is formed at the tip thereof. One end of the coil spring is locked. The other end of the torsion coil spring is locked at the corner of the front portion of the cartridge 203.

The shutter member 2 thus constructed
Reference numeral 11 is slidable in the direction of arrow C in FIG. 17 over a position where the first opening 206 and the second opening are closed and a position where the openings are opened. There is.

Then, when the shutter member 211 is moved and operated by the shutter opening pin of the recording and / or reproducing apparatus, the front surface 209 of the cartridge 203 is fitted with the shutter opening pin. A shutter opening member fitting portion 224 is formed for holding the shutter member 211 at the position where the respective opening portions are opened. This shutter opening member fitting portion 224
Is formed as a notch groove at a position facing one edge portion of the connecting piece portion 214 in a state where the first opening portion 206 and the second opening portion are opened.

A pair of positioning pins for positioning the horizontal position of the disk cartridge 201 when the disk cartridge 201 is mounted on the recording and / or reproducing apparatus is engaged with the lower half 204. Positioning pin engagement holes 225 and 226 are provided. Further, in the lower half 204, the disc 202 is provided near the one positioning pin engaging hole 226.
An erroneous erasure prevention member 227 is attached for indicating whether or not the information signal can be written in. Further, the disk cartridge 201 is recorded and / or recorded on the front side of both side portions 207 and 208 of the cartridge 203.
Alternatively, a pair of cartridge pull-in pin fitting recesses 228 into which the disc cartridge pull-in pins provided in the loading mechanism of the reproducing apparatus are fitted are formed.

[2] Configuration of Recording and / or Reproducing Device (FIGS. 1 to 6) Next, the recording and / or recording according to the present invention using the disc 202 of the disc cartridge 201 described above as a recording medium.
Alternatively, the configuration of the playback device will be described.

In this recording and / or reproducing apparatus, the disc cartridge 201 is inserted into the outer casing and mounted, and the disc 202 of the disc cartridge 201 is mounted.
It is provided with a mechanism and means for recording and / or reproducing an information signal to and from the recording medium. That is, this recording and / or reproducing apparatus is the same as the disk cartridge 201.
Disk loading mechanism 3 for mounting the disk at the loading position on the cartridge mounting portion, and the disk 20 of the disk cartridge 201 at the loading position.
Rotating operation device 2 for rotating 2 and the disk 202
An optical pickup device 4 that is moved over the inner and outer circumferences to write and read information signals to and from the disc 202, and a magnetic field generator that applies an external magnetic field when writing information signals to the disc 202. It has a mechanism such as the magnetic head device 5.

[2-a] Structure of the cartridge mounting portion (FIGS. 1 to 3) The cartridge mounting portion 1 is, as shown in FIG. 1 to FIG.
It is configured to have a chassis 6 in which the disc rotation operating device 2 and the optical pickup device 4 are arranged. The cartridge mounting portion 1 is located at a predetermined loading position on the upper surface side of the chassis 6 and has the disc cartridge 20.
It is configured to hold 1. The chassis 6 has a positioning pin engaging hole 22 for the cartridge 203.
Cartridge locating pins 7 and 8 which are fitted and engaged with 5 and 226 are planted. In addition, the chassis 6 includes
Height reference pins 7a and 8a for holding the cartridge 203 at a predetermined height with respect to the chassis 6 are provided. When the disc cartridge 201 is mounted in the cartridge mounting portion 1, the cartridge positioning pins 7 and 8 have the positioning pin engaging holes 2 respectively.
25, 226 are fitted and engaged, and the height reference pins 7a,
By being mounted on the upper end portion of 8a, the cartridge mounting portion 1 is positioned and mounted at a predetermined loading position.

Further, in the chassis 6, at a position in the vicinity of the cartridge positioning pins 7 and 8, a position regulation is fitted and engaged with a pair of positioning holes 23 and 24 provided in a lower surface portion of a cartridge holder 35 described later. A pair of cartridge holder positioning pins 25, 26 serving as a means are erected.

A disk rotation operating device 2 for rotating the disk 202 of the disk cartridge 201 mounted on the cartridge mounting portion 1 is arranged at substantially the center of the chassis 6. The disk rotation operating device 2 is configured to have a spindle motor 9.
The spindle motor 9 is attached to the lower surface side of the chassis 6, and the spindle shaft 10 is attached to the upper surface side of the chassis 6.
The drive shaft that becomes is projected. The spindle shaft 10
The disk table 11 on which the disk 202 is placed is attached to the tip side of the disk table. A magnet 12 for attracting and holding the chucking hub portion 202a of the disc 202 is arranged on the disc table 11.

An optical pickup device 4 is arranged on the chassis 6. The optical pickup device 4 is arranged so that the objective lens 13 faces the signal recording surface of the disc 202 placed on the disc table 11. The optical pickup device 4 is supported by a pair of feed guide shafts 15 and 16 suspended in an optical pickup device mounting hole 14 formed in a substantially central portion of the chassis 6. And
The optical pickup device 4 is a so-called linear motor device, which is composed of a pair of optical pickup device driving magnets 17 and 18 and a drive coil 19 which are arranged in the optical pickup device mounting hole 14.
As shown by an arrow A in FIG. 3, the feed guide shafts 15 and 1 are
6 along the inner and outer circumferences of the disk 202 in a radial direction.

[2-b] Configuration of Disc Loading Mechanism (FIGS. 1 to 11) The disc loading mechanism 3 for performing the so-called loading operation, which is to mount the disc cartridge 201 in the cartridge mounting portion 1, is shown in FIGS. As shown in FIG. 5, the disc cartridge 201 is inserted from the front side and has a cartridge holder 35 for holding the disc cartridge 201. The disk loading mechanism 3 also includes a cartridge holder support plate 36 that supports the cartridge holder 35, a loading plate 37 that moves the cartridge holder 35 relative to the chassis 6, and the loading plate 3
And a loading plate slide drive mechanism 38 for sliding operation of the device 7.

As shown in FIGS. 2, 5, 7 and 8, the cartridge holder 35 is a thin casing having a space into which the disc cartridge 201 can be inserted by a bent plate member. It is formed into a shape.
Cartridge holding portions 39 and 40 having a substantially U-shaped cross section for holding the disc cartridge 201 are formed on opposite side portions of the cartridge holder 35. On the outer side surface portions of the cartridge holding portions 39, 40, a pair of lifting guide pins 41, 42 and 4 are provided.
3,44 are projected. The lifting guide pins 41, 42, 43, 44 are inserted and engaged in lifting guide grooves provided in a cartridge holder support plate 36 and a loading plate 37, which will be described later.

A shutter opening lever 47 is rotatably attached to the upper plate portion 45 of the cartridge holder 35. The shutter release lever 47 is substantially L
It is formed in a character shape, and the base end side is rotatably supported by the first support shaft 48 via the first support shaft 48 at a substantially central portion of the upper surface portion 45 a of the upper plate portion 45. A shutter opening pin 46 for opening the shutter member 211 is erected on the tip side of the shutter opening lever 47. The shutter opening pin 46 is provided on the upper plate portion 45.
6 is suspended in the cartridge holder 35 via a shutter opening pin guide groove 49 formed along a movement locus around the first support shaft 48.

An open pin escape prevention washer 50 for preventing the shutter open pin 46 from riding on the shutter member 211 is provided on the base end side of the shutter open pin 46. The open pin escape prevention washer 50 is an annular washer having a size large enough to straddle the shutter open pin guide groove 49, and is externally fitted to the shutter open pin 46 and at the same time as the upper plate portion 45.
Is provided in contact with the lower surface portion 45b of the. The position of the shutter opening pin 46 is restricted with respect to the upper plate portion 45 by the opening pin escape prevention washer 50, and the shutter opening pin guide groove 49 is pushed out to the upper side of the cartridge holder 35. It is possible to move without. Therefore, the shutter opening pin 46 is surely slid on the front surface portion 209 of the cartridge 203 to open the shutter member 211 without riding on the shutter member 211.

The shutter release lever 47 rotatably mounted in this manner is connected to the shutter release pin 46 of the disc cartridge 201 by the first tension coil spring 51 as shown by an arrow G in FIG. It is rotationally biased in the direction of moving it to the insertion / removal side. That is, the first tension coil spring 51 is formed by cutting and raising one end side of the shutter opening lever 47.
Of the shutter opening pin 46 of the shutter opening pin guide groove 49 by locking the other end side to the third support shaft 68 of the pulling member operating lever 57 described later. It is located at the front end position, that is, the initial position.

The upper plate portion 45 of the cartridge holder 35 is provided with a cartridge retracting mechanism 53 for retracting the cartridge 203 rearward when the disc cartridge 201 is inserted into the cartridge holder 35. Has been. This cartridge retracting mechanism 53 has a cartridge retracting member 5 having a cartridge retracting pin 54 which is inserted into and engages with the cartridge retracting pin fitting hole 228 of the cartridge 203.
5, a cartridge retracting lever 56 that rotatably supports the cartridge retracting member 55, and a cartridge retracting operation lever 57 that advances and retracts the cartridge retracting lever 56.

The cartridge pull-in lever 56 has an upper surface portion 45a of the upper plate portion 45 of the cartridge holder 35.
7 is engaged with a pair of guide shafts 61 and 62 that are set up in the disk cartridge 2 and the disc cartridge 2
01 is supported so that it can be moved back and forth in a direction along the insertion / removal operation direction of the cartridge holder 35. That is, each guide shaft 6 of the cartridge retracting member 55
At positions corresponding to 1 and 62, elongated hole-like forward / backward operation guide grooves 63 and 64 are provided, respectively. The guide shafts 61 and 62 are inserted into and engaged with the forward and backward operation guide grooves 63 and 64. A third spring locking piece 65 with which the other end of a first torsion coil spring 59, which will be described later, engages is cut near one end of the cartridge retracting lever 56, which is the rear side of the cartridge holder 35. In addition to being raised, a mounting hole 66 for mounting the second support shaft 58 is formed. An engaging recess 67 is provided on the other end of the cartridge pull-in lever 56, which is the front side of the cartridge holder 35. An advance / retreat operation engaging pin 69 that is planted in the cartridge retracting operation lever 57 is engaged with the engaging recess 67.

The cartridge retracting member 55 is formed by bending an elongated plate-like member into a substantially U shape, one end side being the upper side being supported by the cartridge retracting lever 56, and the other end side being the lower side. Is a substantially L-shaped extending portion 55a extending toward the insertion / removal side of the disc cartridge 201.
have. The cartridge retracting member 55 has one end side rotatably attached to one end side of the cartridge retracting lever 56 via the second support shaft 58. A first torsion coil spring 59 is attached to the second support shaft 58, and the first torsion coil spring 59 has the cartridge retracting pin 54 indicated by an arrow H in FIG. The holder 35 is rotationally biased toward the outer side surface of the cartridge holding portion 40. That is,
The first torsion coil spring 59 has one end side locked to the second spring locking piece 60 formed by cutting and raising the cartridge retracting member 55, and the other end side thereof to the first side of the cartridge retracting lever 56. It is locked to the spring locking piece 65 of No. 3. Then, the cartridge pull-in pin 54 is erected on the tip side of the extending portion 55a. The cartridge pull-in pin 54 is urged to move toward the outer side surface of the cartridge holding portion 40 of the cartridge holder 35 by the first torsion coil spring 59.

The cartridge pull-in operation lever 57
Is formed as a substantially crescent-shaped flat plate body, and the substantially central portion thereof is provided with the cartridge holder 3 through the third support shaft 68.
5 is rotatably supported by the upper surface portion 45a of the upper plate portion 45 of the upper portion 5. In addition, this cartridge retracting operation lever 57
Is provided on the insertion / removal side of the disc cartridge 201 in the vicinity of the shutter opening lever 47. The engaging recess 6 of the cartridge retracting lever 56 is provided at one end of the cartridge retracting operating lever 57.
A forward / backward operation engagement pin 69 that engages with 7 is planted, and a fourth spring locking piece 71 that locks the second tension coil spring 70 is cut and raised. On the other hand, the other end of the cartridge pull-in operation lever 57 is engaged with a loading plate 37, which will be described later, and the loading plate 3
A rotation operation engagement piece 72 for rotating the cartridge retraction operation lever 57 by 7 is formed in a protruding manner.

In the cartridge retracting operation lever 57 rotatably mounted in this manner, the second retracting coil spring 70 causes the cartridge retracting lever 56 to be inserted into the disc cartridge 201 as shown by an arrow J in FIG. It is rotationally biased in the operating direction, that is, in the direction of moving it to the rear side. That is, the second tension coil spring 70 has one end side locked to the fourth spring locking piece 71 of the cartridge pull-in operation lever 57,
The other end side is locked to a fifth spring locking piece 73 formed by cutting and raising the cartridge holder 35 to the upper surface portion 45a side of the upper plate portion 45 of the cartridge holder 35.

An erroneous insertion prevention lever 75 for preventing the disc cartridge 201 inserted into the cartridge holder 35 from being inserted in the wrong direction is provided on the upper plate portion 45 of the cartridge holder 35. It is rotatably attached. This incorrect insertion prevention lever 7
Reference numeral 5 denotes a base end side of the cartridge holder 35, which is supported near the one side edge of one of the cartridge holders 40 of the cartridge holder 35 via a fourth support shaft 76. It can be rotated on 45a.
An erroneous insertion prevention pin 77 is erected on the tip side of the erroneous insertion prevention lever 75. This incorrect insertion prevention pin 77 is
The cartridge holder 35 is suspended in the cartridge holder 35 through a notch 78 that is open to one side.

The erroneous insertion prevention lever 75 is urged to rotate by a third tension coil spring 79 in a direction in which the tip end side is moved inward of the cartridge holder 35, as shown by an arrow K in FIG. .. That is, as shown in FIG. 7, the third tension coil spring 79 has one end side locked to a sixth spring locking piece 80 formed by cutting and raising the erroneous insertion prevention lever 75 and the other end side. It is locked to a seventh spring locking piece 81 formed by cutting and raising the upper plate portion 45 of the cartridge holder 35. The erroneous insertion prevention lever 75, when in a state of being urged by the third tension coil spring 79, contacts the positioning projection piece 82 projecting on the peripheral edge of the opening of the cutout portion 78 of the cartridge holder 35. In contact with each other, the erroneous insertion prevention pin 77 is located at the initial position.

A first cutout portion 83 and a second cutout portion 84 are formed at the rear side position of the upper plate portion 45 of the cartridge holder 35. The first notch 83 has a loading plate 37, which will be described later.
The loading plate holding lever that holds the rear side at the initial position is exposed. In addition, in the second cutout portion 84,
A magnetic head device 5 serving as a magnetic field generator is supported.

As shown in FIG. 5, the magnetic head device 5 has a magnetic head 20 having a magnetic field generating coil for applying a magnetic field of a predetermined intensity to the signal recording layer of the disk 202.
have. The magnetic head 20 is attached to a magnetic head support member 21 that is attached to the cartridge holder 35 so as to be transferable.

The magnetic head support member 21 is transferred in the radial direction over the inner and outer circumferences of the disk 202 in synchronization with the optical pickup device 4, and the magnetic head 20 is always moved through the disk 202. It is arranged to face the objective lens 13 of the optical pickup device 4.

That is, the magnetic head supporting member 21
Is supported by a pair of magnetic head support shafts 27, 28 positioned on both inner sides of the second cutout portion 84 and supported by the cartridge holder 35, and along the magnetic head support shafts 27, 28. It is made movable. The pair of magnetic head support shafts 27 and 28 are
Shaft support claws 35a integrally formed on the upper plate portion 45 of the cartridge holder 35 at the front side position and the rear side position of both sides of the second cutout portion 84, respectively.
It is supported by 35b, 35c and 35d. These shaft support claws 35a, 35b, 35c, 35d are provided so as to project toward the inner side of the second cutout portion 84, and are substantially L-shaped toward the inner side of the cartridge holder 35. It is bent and formed. The pair of magnetic head support shafts 27, 28 includes a shaft support pawl 35a, 35b on one side of the second cutout portion 84 and a shaft support pawl 35c on the other side of the second cutout portion 84. , 35d
And, each one is placed and supported. The magnetic head support shafts 27, 28 are provided with the shaft support claws 35a, 35b, 35c, 35d.
And these shaft support claws 35a, 35b, 35c,
The support shaft holding plates 34a, 34b, 34c, 34d, which are attached to the plate portion 45 corresponding to 35d, are sandwiched and attached to the cartridge holder 35.

The magnetic head support member 21 is located close to the disk 202 of the disk cartridge 201 inserted into the cartridge holder 35, and the magnetic head 20 is moved to the magnetic field of the signal recording layer of the disk 202. Is held at a height position where the application of Then, the magnetic head device 5 is moved together with the cartridge holder 35 in the contact / separation direction with respect to the chassis 6. Further, the magnetic head supporting member 21 is radially transferred over the inner and outer circumferences of the disk 202.

In the front portion of the lower ends of the cartridge holding portions 39 and 40 of the cartridge holder 35, paired positioning holes 23 and 24 are formed. These positioning holes 23, 24 are formed in the lower end side of each cartridge holding portion 39, 40 in a portion bent inward of the cartridge holder 35 so as to be parallel to the chassis 6. ..

When the cartridge holder 35 is supported by the cartridge holder support plate 36, the upper plate portion 45 of the cartridge holder 35 has a shutter release lever 47 and a cartridge provided on the upper plate portion 45. A bulging portion 88 for preventing the pull-in operation lever 57 and the like from coming into contact with the cartridge holder support plate 36.
Are formed. The bulging portion 88 is formed as a protrusion having a protrusion amount of at least the plate thickness of the various levers in the vicinity of the insertion / removal opening of the disc cartridge 201 of the upper plate portion 45 of the cartridge holder 35.

Further, as shown in FIG. 8, on the lower surface portion 45b of the upper plate portion 45 of the cartridge holder 35, a cartridge which pushes down the disc cartridge 201 inserted into the cartridge holder 35 toward the disc table 11 side. A push-down member 89 is formed so as to project. The cartridge depressing member 89 is provided at a position near the shutter opening pin 46 at the initial position, and is formed so as to have a projection amount at least equal to or larger than the plate thickness of the opening pin escape prevention washer 50. The cartridge pushing down member 89 is used for the disc cartridge 2
01 is prevented from riding on the open pin escape prevention washer 50.

A cartridge is inserted into the upper plate portion 45 of the cartridge holder 35 to regulate the position of the disc cartridge 201 inserted into the cartridge holder 35 so as not to be inserted further inward than the loading position. Position regulating members 90 and 91 are provided. This cartridge insertion position regulating member 9
0 and 91 are the second parts along the rear edge of the upper plate part 45.
In the vicinity of the open end edge of the notch portion 84, the bent portion is formed so as to be bent inward of the cartridge holder 35.

When the cartridge holder 35 is at the eject position where the disc cartridge 201 can be attached to and detached from the cartridge holder 35, the outer surface of one of the cartridge holders 40 of the cartridge holder 35 is A cartridge pull-in pin position regulating tongue 92 for holding the cartridge pull-in pin 54 in the initial state is formed by being bent outward. The cartridge pull-in pin position regulating tongue piece 92 holds the cartridge pull-in pin 54 so that the disc cartridge 201 and the cartridge pull-in pin 54 do not come into contact with each other when the disc cartridge 201 is inserted into the cartridge holder 35. It is designed to be held in a state of being escaped to the outside.

As shown in FIG. 4, the cartridge holder support plate 36 for supporting the cartridge holder 35 has a plate-like member bent to have a size sufficient to hold the cartridge holder 35 inside. Then, the front side, the rear side, and the lower side are formed in a housing shape that is open. The opposite side wall portions of the cartridge holder support plate 36 are formed as cartridge holder support walls 93 and 94 that support the cartridge holder 35 so that the cartridge holder 35 can move up and down. These cartridge holder support walls 93, 94
The lift guide pin 4 of the cartridge holder 35.
Elevating guide grooves 95, 97, 96, 98 into which 1, 42, 43, 44 are inserted and slidably engaged are provided. Of these lifting guide grooves 95, 96, 97, 98, the lifting guide grooves 95, 97 provided on the insertion / removal side of the disc cartridge 201, that is, on the front side, are wide enough to insert the lifting guide pins 41, 43. Is cut out as a slit groove in parallel with the spindle shaft 10 of the disk rotation driving device 2. On the other hand, the rear elevating guide grooves 96 and 98 are formed as wide grooves and are also cut out in parallel with the spindle shaft 10 of the disk rotation driving device 2. It should be noted that the rear elevating guide pins 42, 44 are slidably engaged with the rear side edge portions 96a, 98a of the elevating guide grooves 96, 98 in the wide elevating guide grooves 96, 98. It is supposed to meet. That is, the elevation guide pins 41, 43 on the front side
Is inserted into and engaged with the corresponding lifting guide grooves 95 and 97, and the rear lifting guide pins 42 and 44 are slidably engaged with the side edge portions 96a and 98a of the rear lifting guide grooves 96 and 98, respectively. It is supposed to do.

Then, the cartridge holder supporting wall 9
Mounting portions 99, 100 and 101, 102 for fixing the cartridge holder supporting plate 36 to the chassis 6 are provided on the front side portion and the rear side portion of the lower ends of the 3, 94.
Are provided so as to extend inward. That is, the cartridge holder support plate 36 is fixed to the chassis 6 by screwing the mounting portions 99, 100, 101, 102 to the chassis 6.

Further, the cartridge holder support plate 36
A loading plate holding lever 103 for holding a loading plate 37, which will be described later, at a rear side initial position against the urging force of the tension coil spring is rotatably attached to this. The loading plate holding lever 103 is rotatable by having its base end side supported by the cartridge holder support plate 36 via the fifth support shaft 104. Then, the loading plate holding lever 103
The leading end side of the loading plate 37 is engaged with a loading plate locking member provided on the loading plate 37.
Is provided with a hook-shaped engaging claw 103a for holding the rear side at the initial position. A loading plate holding lever turning pin 105 for turning the loading plate holding lever 103 is erected at the base end of the engaging claw 103a. This loading plate holding lever turning pin 10
The cartridge holder 35 has a cutout portion 83 that is open to one side of the cartridge holder 35.
It is hanging inside. It should be noted that the tip of the loading plate holding lever pivot pin 105 hangs down to at least a position where it abuts the disc cartridge 201 inserted into the cartridge holder 35.

Then, the loading plate holding lever 1
03 by means of the second torsion coil spring 106.
As indicated by the middle arrow L, the loading plate holding lever pivot pin 105 is pivotally biased in a direction to move it against the insertion operation direction of the disc cartridge 201. That is, the second torsion coil spring 106
One end of the loading plate holding lever turning pin 1
No. 05 is engaged with the base end portion, and the other end side is engaged with an eighth spring engagement piece 107 formed by cutting and raising the cartridge holder support plate 36. Then, the locking claw 103
In a state where the engagement between the a and the loading plate locking member is released, in the loading plate holding lever 103, the lever rotation preventing piece 103b formed by cutting and raising the loading plate holding lever 103 is formed in the cartridge holder supporting plate. The rotation is restricted by being locked by 36.

The cartridge holder support plate 36 is
A third notch 108 facing the cartridge pull-in lever 56 and a fourth notch 109 corresponding to the magnetic head device 5 are formed in the. Further, the cartridge holder support plate 36 is provided with loading plate slide pins 113, 114, 115 and 116 for sliding a loading plate 37, which will be described later, in the insertion / removal direction of the disc cartridge 201.

The loading plate 37 is slidably attached to the cartridge holder support plate 36. As shown in FIG. 6, the loading plate 37 has a flat plate-like slide portion 117 that slides in sliding contact with the cartridge holder support plate 36, and the disk rotation drive device 2 on both opposite sides of the slide portion 117. Cam plate portions 118, 1 hung down to the side
And 19.

The slide portion 117 has slide grooves 120, 121, 122, 12 into which the loading plate slide pins 113, 114, 115, 116 provided on the cartridge holder support plate 36 are inserted and engaged, respectively.
3 is provided. These slide grooves 120, 12
Reference numerals 1, 122 and 123 are formed in the shape of oblong holes at the positions corresponding to the loading plate sliding pins 113, 114, 115 and 116, respectively, with the insertion / removal direction of the disc cartridge 201 being the longitudinal direction.

Further, the slide portion 117 is provided with a loading plate locking member 124 which engages with the loading plate holding lever 103 provided on the cartridge holder support plate 36. The loading plate locking member 124 is formed as a cylindrical body large enough to be locked by the engaging claw 103a of the loading plate holding lever 103, and is screwed through a hole provided in the center of the cylindrical body. It is rotatably attached to the slide portion 117 by 125.

Further, the slide portion 117 is formed with a fifth cutout portion 126 facing the cartridge retracting lever 56 and a sixth cutout portion 127 corresponding to the magnetic head device 5. Further, on the slide portion 117, the rotation operation engagement piece 7 of the cartridge retraction operation lever 57 provided on the cartridge holder 35 is provided.
A seventh cutout 128 is provided, which the 2 faces.

Further, one side edge 128 of the seventh cutout portion 128 on the insertion / removal side of the disc cartridge 201.
When the loading plate 37 is in the initial position on the rear side, a is brought into abutting engagement with the rotary operation engaging piece 72 inserted into the cutout portion 128 to move the cartridge retracting operation lever 57. Rotate.

On the rear side of the seventh cutout portion 128, an operating portion 129 into which a loading plate slide pin of a loading plate slide drive mechanism 38 having the loading plate 37 at an initial position on the rear side is inserted and engaged. Is provided. The operation portion 129 is formed as a flat plate-like body having a substantially square planar shape, and the slide portion 11 is provided.
7 is provided on one rear side edge. A pin sliding hole 129a into which the loading plate slide pin is inserted and engaged is formed in the operation portion 129 as a substantially circular hole.

As shown in FIG. 3, the loading plate slide mechanism 38 provided with a loading plate slide pin that is inserted into and engaged with the pin sliding hole 129a is provided with an eject motor (not shown) provided below the chassis 6. , And a loading plate operation gear 131 provided with a loading plate slide pin 130 that is rotationally driven by this motor. The ejecting motor and the loading plate operating gear 130 are connected by a plurality of connecting gear mechanisms 132 of different sizes. And
The loading plate slide pin 130 is installed at an eccentric position of the loading plate operation gear 131.

In the loading plate slide mechanism 38, an ejecting operation button (not shown) is operated to drive the ejecting motor and the loading plate operating gear 13 is driven.
1 is rotationally driven. Then, the loading plate slide pin 130 is attached to the pin sliding hole 1 of the loading plate 37.
The loading plate 37 is slid by engaging with the peripheral edge of the opening of the opening 29a. That is, the loading plate slide pin 130 includes a tension coil spring 70 stretched on the cartridge pull-in operation lever 57,
The loading plate 37 is slid to an initial position on the rear side against the biasing force of a tension coil spring, which will be described later, stretched between the loading plate 37 and the chassis 6. The loading plate slide pin 130 is rotated to a position where it does not slide into the pin sliding hole 129a when the loading plate 37 is not in the rearward initial position.

On the cam plate portions 118 and 119 provided on opposite sides of the slide portion 117, elevating cam grooves 135, 136, 137 and 138 for moving the cartridge holder 35 up and down with respect to the chassis 6. Are provided respectively. These lifting cam grooves 135, 13
6, 137 and 138 are the disk cartridges 20
Horizontal parts 135a, 136a, 13 parallel to the insertion / removal direction of 1
7a, 138a and the horizontal portions 135a, 136a, 1
First inclined portions 135b and 136 that gently incline rearward from 37a and 138a toward the chassis 6 side.
b, 137b, 138b, and the second inclined portion 135 that is further inclined toward the chassis 6 toward the rear side.
c, 136c, 137c, 138c. The elevating cam grooves 135, 13 formed in this way
The cartridge holder 35 supported on the chassis 6 by inserting the elevating guide pins 41, 42 and 43, 44 through 6, 137, 138 has the elevating cam grooves 135, 13 respectively.
6, 137, 138, and lifting guide pins 41, 42, 4
By being guided by 3, 44, the disk rotation driving device 2 is moved in the axial direction of the spindle shaft 10, that is, in the contacting / separating direction with respect to the chassis 6.

In the vicinity of the elevating cam grooves 136 and 138 on the rear side of the cam plate portions 118 and 119, there is provided a fourth portion for constantly urging the loading plate 37 toward the insertion / ejection side of the disc cartridge 201. Tension coil spring 13
One end sides of 9 are attached respectively. In the figure, one of the tension coil springs 139 is omitted. The tension coil springs 139 have spring locking pins 140 and 141, the other ends of which are erected on the chassis 6.
The loading plate 37 is always urged to the front side, that is, the insertion / removal side of the disc cartridge 201, by being locked.

[3] Description of Mounting Operation of Disc Cartridge (FIGS. 9 to 16) An operation state of mounting the above-described disc cartridge 201 on the recording and / or reproducing apparatus configured as described above will be described.

[3-a] Description of State Before Insertion of Disk Cartridge (9th to 11th) To mount the disk cartridge 201 in the cartridge holder 35, an eject button (not shown) is operated, As shown in FIG. 11, the loading plate 37 is set to the initial position on the rear side, and the cartridge holder 35 is moved to the eject position separated from the chassis 6.

That is, when the eject button is operated, the loading plate slide mechanism 38 is driven,
A loading plate slide pin 130 of the loading plate slide mechanism 38 slidably engages with an operation portion 129 provided on the loading plate 37, and a fourth tension is stretched between the loading plate 37 and the chassis 6. The loading plate 37 is slid toward the insertion side of the disc cartridge 201 against the biasing force of the coil spring 139 and the tension coil spring 70 stretched around the cartridge retracting lever 57. Then, the loading plate holding lever 103 of the cartridge holder support plate 36 is engaged with the loading plate locking member 124 provided on the loading plate 37, and the loading plate 37 is held at the rear side initial position.

Further, when the loading plate 37 is slid, the rotation operation engaging piece 72 of the cartridge retracting operation lever 57 projectingly engaged in the seventh cutout portion 128 of the loading plate 37 is located on the rear side. Be drawn into. Then, the cartridge pull-in lever 56 connected to the cartridge pull-in operation lever 57 is slid to the insertion / removal side of the disc cartridge 201, that is, the front side. Then, the cartridge pull-in pin 54 of the cartridge pull-in member 55 rotatably supported on the tip end side of the cartridge pull-in lever 56,
The disc cartridge 201 is inserted into the cartridge holder 35 by abuttingly engaging the cartridge pull-in pin position regulating tongue 92 of the cartridge holder 35.
It is held in a position where it does not come into contact with and escapes to the outside.

It should be noted that the shutter opening pin 46 includes the shutter opening lever 47 and the cartridge retraction operation lever 5.
The first tension coil spring 51 is stretched over the first tension coil spring 51 and the first tension coil spring 51 to set the initial position. On the other hand, the erroneous insertion prevention pin 77 is similarly set to an initial position that hangs in the cartridge holder 35 by a third tension coil spring 79 stretched over the erroneous insertion prevention lever 75 and the cartridge holder 35. ..

[3-b] Description of the state in which the disc cartridge is being inserted (FIGS. 15 to 16) Then, in this state, the side on which the shutter member 211 is attached to the disc cartridge 201 is the front side, and the cartridge is Insert operation into the holder 35 from the front side.

When the disc cartridge 201 is inserted into the cartridge holder 35, first, the corner portion on the front end side of the cartridge 203 comes into contact with the erroneous insertion prevention pin 77 rotatably attached to the cartridge holder 35. .. At this time, if the insertion direction of the disc cartridge 201 is correct, the erroneous insertion prevention pin 77 is moved to the arrow M in FIG. 13 by the cartridge 203.
The disc cartridge 201 is inserted by rotating the disc cartridge 201 in the outward direction indicated by. On the other hand, when the disc cartridge 201 is inserted into the cartridge holder 35 with the wrong insertion direction, the insertion is prevented by the erroneous insertion prevention pin 77.

When the disc cartridge 201 is further inserted, as shown in FIG. 14, the shutter opening pin 46 is attached to the front surface portion 209 of the cartridge 203.
Abut. The front portion 2 of the shutter opening pin 46
At the time of abutting against 09, the cartridge pressing member 89 formed on the upper plate portion 45 of the cartridge holder 35 so as to face the shutter opening pin 46,
The disc cartridge 201 is pushed down to the disc table 11 side, and abuts on the front face portion 209 in a state where the disc cartridge 201 is prevented from riding on the release pin escape prevention washer 50 provided on the shutter release pin 46.

When the disc cartridge 201 is further inserted into the cartridge holder 35 from this state, as shown in FIG. 15, one end of the shutter member 211 contacts the shutter opening pin 46, and the shutter member 211 causes the shutter member 211 to move. The opening pin 46 is moved in the direction of opening the openings 206 and 210 of the disc cartridge 201 indicated by the arrow N in FIG. 15 against the biasing force of the torsion coil spring provided in the cartridge 203. At this time, the shutter opening pin 46 is
Since the position of the opening pin escape prevention washer 50 is regulated with respect to the shutter opening pin guide groove 49, the shutter member 211 can be reliably moved and operated without riding on the shutter member 211.

When the disc cartridge 201 is further inserted into the cartridge holder 35,
The loading plate holding lever turning pin 105 of the loading plate holding lever 103 rotatably attached to the cartridge holder supporting plate 36 and the cartridge 203.
The loading plate holding lever 103 is rotated in the direction of the arrow O in FIG. 15 by contact with the front end of the loading plate holding lever 103 and the loading plate locking member 124 provided on the loading plate 37. Is canceled. As a result, the lock on the loading plate 37 is released, and the loading plate 37 is stretched across the loading plate 37 and the chassis 6 to form the fourth plate.
9 and 10, the pulling coil spring 139 slides the disc cartridge 201 to the insertion / removal side, that is, the front side.

At the same time, the one side edge 128a of the cutout portion 128 of the loading plate 37 releases the engagement of the cartridge retracting operation lever 57 with the rotating operation engaging piece 72. As a result, the cartridge pull-in pin 54, which is held outside the disc cartridge 201, is fitted and engaged with the cartridge pull-in pin fitting hole 228 provided in the disc cartridge 201. Then, the cartridge retraction operation lever 57
A second tension coil spring 70 stretched between the cartridge holder 35 and the cartridge holder 35 causes the cartridge pull-in operation lever 57 to rotate, and the cartridge pull-in lever 56 connected to the cartridge pull-in operation lever 57 is attached to the disc cartridge 201. Move it to the insertion side. As a result, the cartridge retracting member 5 provided on the tip end side of the cartridge retracting lever 56.
5 by the second tension coil spring 70 stretched over the cartridge pull-in operation lever 57 and the cartridge holder 35.
Is moved to the rear side indicated by the arrow P in FIG. As a result, the disc cartridge 201 is stored in the cartridge holder 35, and the first and second openings 206 and 210 are fully opened.

[3-c] Explanation of Completed Mounting State of Disk Cartridge (FIGS. 9 to 12) Then, with the operation of moving the loading plate 37 to the front side, the cartridge holder 35 is loaded by the loading plate 37. Lifting cam grooves 135, 136 provided on the
The lifting guide pins 41, 42, 4 are attached to 137, 138.
3 and 44 are guided and moved down to the chassis 6 side as shown by the arrow R in FIGS. 9 to 11. That is, the cartridge holder 35 includes the lifting guide groove 95 provided on the cartridge holder support plate 36,
It is descended along 96, 97 and 98.

At this time, the cartridge holder 35
12, as shown in FIG.
The respective cartridge holder positioning pins 25 and 26 are fitted into the corresponding positions so that the cartridge holder positioning pins 25 and 26 are positioned at predetermined positions with respect to the chassis 6.

Then, the disk cartridge 201
Is mounted at the loading position with respect to the cartridge mounting portion 1. At this time, the disc cartridge 201 is positionally regulated and held at a predetermined height by the height positioning pins 7a and 8a and the disc cartridge positioning pins 7 and 8 provided on the chassis 6. At the same time, the optical disc 202 housed in the disc cartridge 201
Are mounted and mounted on the disc table 11.

Therefore, the magnetic head 20 faces the opening 210 of the disk cartridge 201,
The disc 202 is held at a predetermined height position with respect to the signal recording layer and a predetermined position with respect to a recording track formed on the signal recording layer. This magnetic head device 20
Is opposed to the optical pickup device 4 via the disc 202, and cooperates with the optical pickup device,
The information signal can be written in the signal recording layer.

In the disk cartridge 201 thus mounted in the cartridge mounting portion 1, the eject button is operated to set the loading plate 37 to the initial position on the rear side, and the cartridge holder 35.
Is set to the eject position separated from the chassis 6, so that the cartridge can be discharged to the front side of the cartridge holder 35.

[0094]

As described above, the recording and / or recording according to the present invention
Alternatively, in the reproducing apparatus, a holder for holding a disc which is a recording medium capable of writing an information signal by applying a magnetic field and transferring the disc to a loading position where the information signal can be written and / or read from the disc. The member supports a magnetic field generator that applies a magnetic field to the disc so that the magnetic field generator can be moved and operated in the radial direction of the disc. Support.

That is, the magnetic field generating device is always set at a predetermined height position with respect to the disc, and the amount of protrusion to the upper side of the disc is minimized, so that the recording and / or reproducing device can be made thin. Do not block.

Further, in this recording and / or reproducing apparatus, when the holder member is position-regulated by the position-regulating means provided on the chassis when the disc is at the loading position, it is supported by the holder member. The generated magnetic field generator is set at a predetermined position with respect to the disc in the direction along the main surface portion of the disc.

That is, according to the present invention, the size of the apparatus is reduced,
In particular, it is possible to provide a recording and / or reproducing apparatus which can be reduced in size in the vertical direction with respect to the chassis and can be made thin and which can write an excellent information signal.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a main part of a recording and / or reproducing apparatus according to the present invention.

FIG. 2 is a reduced exploded perspective view of a main part of the recording and / or reproducing apparatus.

FIG. 3 is a perspective view showing a configuration of a cartridge mounting portion which constitutes the recording and / or reproducing apparatus.

FIG. 4 is a perspective view showing a configuration of a cartridge holder support plate that constitutes the recording and / or reproducing apparatus.

FIG. 5 is a perspective view showing a configuration of a cartridge holder that constitutes the recording and / or reproducing apparatus.

FIG. 6 is a perspective view showing a configuration of a loading plate that constitutes the recording and / or reproducing apparatus.

FIG. 7 is an exploded perspective view of the cartridge holder shown in FIG.

FIG. 8 is a perspective view of the cartridge holder seen from the bottom side.

FIG. 9 is a right side view of a main part of the recording and / or reproducing apparatus in an eject state.

FIG. 10 is a left side view of a main part of the recording and / or reproducing apparatus in an eject state.

FIG. 11 is a front view of a main part of the recording and / or reproducing apparatus in an ejecting state.

FIG. 12 is an enlarged front view of a main part of the recording and / or reproducing apparatus in a loading state in which a part is broken.

FIG. 13 is a bottom view showing the mounting start state of the disc cartridge with respect to the cartridge holder.

FIG. 14 is a bottom view showing a state where the disc cartridge is being mounted in the cartridge holder.

FIG. 15 is a bottom view showing a state immediately before the completion of mounting the disc cartridge in the cartridge holder.

FIG. 16 is a bottom view showing a state in which the disc cartridge is completely attached to the cartridge holder.

FIG. 17 is a perspective view of the lower surface side showing the configuration of the disc cartridge mounted in the recording and / or reproducing apparatus according to the present invention.

FIG. 18 is a perspective view showing a configuration of a magnetic head device used in a conventional recording and / or reproducing device.

[Explanation of symbols]

1 ・ ・ ・ Cartridge mounting part ・ ・ ・ ・ ・ ・ ・ Magnetic Head device 6 ・ ・ ・ ・ ・ ・ Chassis 20 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Magnetic Head 21 ... Magnetic head support member 23, 24 ... Positioning hole 25 , 26 ... Cartridge holder positioning pin 27, 28 ... Magnetic head support shaft 35 ... ..... Cartridge holder 201 ..... Disc cartridge 202 .....・ ・ ・ ・ ・ ・ ・ ・ ・ ・... Disk 203 ... Cartridge

Claims (2)

[Claims] 1. A disc, which is a recording medium on which information signals can be written, is held by applying a magnetic field, and the disc is transferred to a loading position where information signals can be written and / or read on the disc. A recording and / or reproducing apparatus comprising a holder member and a magnetic field generator that is supported by the holder member so as to be movable in the radial direction of the disk and applies a magnetic field to the disk held by the holder. 2. The recording and / or reproducing apparatus according to claim 1, wherein the holder member is position-regulated by a position-regulating means provided on the chassis when the disc is at the loading position.