JPH04372706A - Disk recorder - Google Patents

Abstract

PURPOSE:To exactly hold a prescribed distance between a magnetic head device and a recording disk, and to attain the satisfactory writing of an information signal by adjusting the screwing amount of a height adjusting screw into a magnetic head supporting member. CONSTITUTION:As for a magnetic head supporting member 23 which supports the magnetic head device, the height position from a chassis 6 is positioned at the time of the writing of the information signal, by the abutment of one edge part 110d of a height adjusting screw 110 screwed into this magnetic head supporting member 23 with a positioning reference part 112 on the chassis 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus for recording information signals on a recording disk.

0002

2. Description of the Related Art Conventionally, recording disks such as optical disks, magneto-optical disks, and magnetic disks have been proposed, which are configured to allow information signals to be written and read and used as recording media for information signals.

The magneto-optical disk has a signal recording layer made of a magnetic thin film capable of perpendicular magnetization. This signal recording layer is heated to a temperature higher than the Curie temperature by laser beam irradiation, and an external magnetic field is applied to reverse the direction of magnetization, thereby writing information signals. In addition, the information signal written in this signal recording layer is generated by irradiating the surface of the signal recording layer with a linearly polarized light beam such as a laser beam, and the polarization direction is determined by the so-called Kerr effect that occurs when the light beam is reflected at the surface. By detecting the change in the magnetization direction, the difference in the magnetization direction is determined and read out.

The magnetic disk has a signal recording layer made of a magnetic thin film that can be magnetized. This signal recording layer is magnetized in a predetermined direction by applying an external magnetic field by a magnetic head device, thereby writing information signals. In addition, the information signal written in this signal recording layer is
The information is read by detecting the magnetization intensity using the magnetic head device.

[0005] In order to prevent such recording disks from being damaged or soiled due to adhesion of dust or contact with fingers or the like when not in use, a disk cartridge has been proposed in which the recording disk is housed in a cartridge. ing. This cartridge has a thin housing shape so that it can accommodate the recording disk. That is, the main surface portion of this cartridge has a substantially rectangular shape with sides slightly longer than the diameter of the recording disk. Moreover, the thickness of this cartridge is made thicker than the thickness of the recording disk.

[0006] The cartridge has a recording/reproducing opening that exposes the main surface of the recording disk serving as a signal recording surface to the outside across the inner and outer peripheries, and a recording/reproducing opening that exposes the center of the recording disk to the outside. A chucking opening is provided. Further, a shutter member is attached to the cartridge to close each opening when the recording disk is not in use and to open the opening when the recording disk is in use.

[0007] A disk recording device is used to write information signals using a disk cartridge constructed by storing a recording disk in the cartridge as described above. The disk recording device includes a magnetic head device that applies an external magnetic field to the recording disk, and a disk cartridge loading device that opens each opening of the cartridge to mount the disk cartridge in a predetermined mounting position. has been done. Further, the disk recording device for writing information signals onto the magneto-optical disk is provided with not only the magnetic head device and the disk cartridge loading device, but also an optical pickup device that irradiates the magneto-optical disk with a light beam. ing.

The disk cartridge loading device places the disk cartridge at a mounting position of the disk recording device, that is, a position where the recording disk of the disk cartridge is held and rotated by the rotation operating device of the disk recording device. Have them wear it. In this mounting position, the optical pickup device and the magnetic head device are moved in the radial direction of the recording disk over the inner and outer peripheries of the recording disk, so that information signals are transmitted over almost the entire surface of the recording disk. It is possible to write. At this time, the disc cartridge loading device moves the shutter member to open the opening of the disc cartridge.

The above-mentioned magnetic head device includes a head chip consisting of a coil, a core, etc. for applying a magnetic field. This magnetic head device is slidably supported by a magnetic head support frame disposed on the chassis of the disk recording device. The magnetic head support frame includes a
A pair of mutually parallel guide shafts for moving the magnetic head device are attached. That is, the magnetic head device is supported by these guide shafts so as to be slidable in a direction parallel to the chassis. The magnetic head support frame is supported by a support shaft erected on the chassis so as to be movable toward and away from the chassis.

[0010] The magnetic head device is slid along each of the guide shafts to cover the inner and outer peripheries of the signal recording surface of the recording disk mounted on the rotary drive device in the radial direction of the recording disk. It can be moved and operated. That is, the magnetic head device is configured such that when the recording disk is rotated by the rotation drive device, the magnetic head device can face the recording disk over the entire signal recording surface of the recording disk.

[0011]The magnetic head support frame has the following features:
Along the support shaft erected on the chassis, it is operated toward and away from the chassis by an elevating cam or the like.

In this disk recording device, when the recording disk is mounted on the rotary drive device and the magnetic head support frame is lowered in a direction approaching the chassis, the magnetic head device is brought close to the state where it is almost in contact with.

The magnetic head device applies a predetermined external magnetic field to the recording disk while substantially in contact with the recording disk. In this way, by applying a magnetic field to the recording disk, information signals are written to the signal recording layer of the recording disk.

[0014]

[Problems to be Solved by the Invention] In the above-described disk recording device, when the magnetic head support frame is lowered toward the chassis, the height of the magnetic head support frame relative to the chassis is determined. If the position is not accurately determined, there is a risk that information signals may not be properly written onto the recording disk.

The magnetic head device is supported by the magnetic head support frame via a so-called servo mechanism so that it is always at a constant height with respect to the recording disk, but the height of the magnetic head support frame is If the position is not at a predetermined height position, the servo mechanism will not operate properly, and there is a possibility that the height position relative to the recording disk may fluctuate. When the height position of the magnetic head device relative to the recording disk changes, the strength of the magnetic field applied to the recording disk changes, making it impossible to write information signals in a satisfactory manner.

Conventionally, the height position of the magnetic head support frame has been adjusted by measuring the height position of the magnetic head support frame, and based on this measurement, adjusting the height position of the magnetic head support frame and the chassis. This is done by interposing a spacer member such as a washer. Such adjustment is not only complicated, but also requires that the height position of the magnetic head support frame be kept at an accurate height over a long period of time due to changes over time in the volume of the adhesive used to fix the spacer. The problem is that it cannot be maintained in the correct position.

The present invention has been proposed in view of the above-mentioned conventional situation, and it is possible to easily set the distance between the magnetic head device and the recording disk to a predetermined distance accurately. It is an object of the present invention to provide a disk recording device capable of writing information signals satisfactorily.

[0018]

[Means for Solving the Problems] In order to solve the above problems and achieve the above objects, a disk recording device according to the present invention is arranged on a chassis, a recording disk is mounted thereon, and the recording disk is rotated. a rotational drive device; a magnetic head support member that supports a magnetic head device that is supported movably in a direction toward and away from a recording disk mounted on the rotational drive device and applies a magnetic field to the recording disk; a height adjustment screw that is screwed into the magnetic head support member, has one end protruding toward the chassis side, and is capable of adjusting the amount of protrusion of the one end side from the magnetic head support member; When the head support member is moved in a direction in which the magnetic head device approaches a recording disk mounted on the rotary drive device,
The height position relative to the recording disk is determined by contact between one end of the height adjustment screw and a positioning reference portion on the chassis.

[0019]

[Operation] In the disk recording device according to the present invention, the magnetic head support member that supports the magnetic head device that applies a magnetic field to the recording disk mounted on the rotary drive device disposed on the chassis is configured to The magnetic head device is supported so as to be movable in the approaching and separating directions, and is screwed into the magnetic head supporting member with one end facing toward the chassis when the magnetic head device is moved in the direction of approaching the recording disk. The height position relative to the recording disk is determined by the contact between one end of the height adjustment screw, whose protrusion amount from the magnetic head support member on the one end side can be adjusted, and the positioning reference portion on the chassis. Therefore, by adjusting the amount of protrusion of one end of the height adjusting screw from the magnetic head supporting member, the height position relative to the recording disk can be adjusted.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. [1] Configuration of disk cartridge (Figures 26 and 27
) The disk cartridge 201 used as a recording medium in the disk recording device according to the present invention is shown in FIGS. 26 and 27.
As shown in FIG. 2, a disk-shaped recording disk 202 and a cartridge 2 that rotatably accommodates the recording disk 202 are provided.
03.

The recording disk 202 is an optical disk, a magneto-optical disk, or the like, and has a signal recording layer on its main surface, and information signals can be written and recorded on this signal recording layer by optical or magneto-optical means. It is designed so that it can be read. This recording disk 202 is
One main surface is used as a signal recording surface. and,
In the center of one main surface of this recording disk 202,
A chucking hub 202a is attached for being chucked by the disc recording device. The recording disk 202 in this example is a magneto-optical disk using a magnetic thin film as a signal recording layer, and has a diameter of 3.5 inches.

[0022] The cartridge 203 is constructed in the shape of a thin casing that is large enough to accommodate the recording disk 202 therein. That is, this cartridge 203 has a main surface having a substantially rectangular shape of 90 mm x 94 mm and a thickness of 6 mm. This cartridge 203 has a pair of upper half 205 and lower half 20.
4, these upper half 205 and lower half 204
are butt-coupled. The recording disk 202 is rotatably housed in the cartridge 203.

The lower half 204 of the cartridge 203 includes a chucking hub 202a attached to the center of the recording disk 202, and a part of the signal recording surface of the recording disk 202 housed in the cartridge 203. A first opening 206 is provided to allow the inner and outer circumferences to face outward. This first opening 20
Reference numeral 6 is formed as a long hole extending from approximately the center of the lower main surface 207 of the cartridge 203 on the side of the front surface 209 of the cartridge 203 to the center of the lower main surface 207 .

The first opening 206 is located in the chucking hub 2 when the disc cartridge 201 is installed in the mounting position of the disc recording device according to the present invention.
02a is made to face a rotation operating device that rotates the recording disk 202, and the signal recording surface of this recording disk 202 is made to face an optical pickup device of the disk recording apparatus.

On the other hand, the upper half 205 has a second opening (not shown) opposite to the first opening 206 provided in the lower half 204. This second opening is located at the front surface 209 of the cartridge 203.
It is provided at a position closer to the side and is formed as a rectangular hole large enough to allow a part of the other main surface of the recording disk 202 to face outward across the inner and outer peripheries in the radial direction. The second opening allows the other main surface of the recording disk 202 to be attached to the magnetic head device of the disk recording device when the disk cartridge 201 is installed in the mounting position of the disk recording device. It is designed to make you feel present.

Note that the front section 2 of the cartridge 203
In 09, the optical pickup device and the magnetic head device are easily inserted into the cartridge 203 while closely facing each main surface portion of the recording disk 202 corresponding to the first opening 206 and the second opening. Notch recesses 206a and 210a are provided to allow entry into the interior. That is, the thickness of the central portion of the cartridge 203 near the front surface 209 is approximately the same as the thickness of the recording disk 202 at the portion corresponding to the first opening 206 and the second opening. It has been made very thin.

A shutter member 211 for opening and closing the first opening 206 and the second opening is slidably attached to the cartridge 203. This shutter member 211 includes a first shutter plate portion 212 that closes the first opening 206 of the lower half 204, and a first shutter plate portion 212 that is disposed parallel to and opposite to the first shutter plate portion 212 of the upper half 205. A second shutter plate part 213 that closes the second opening, and these first and second shutter plate parts 21
2 and 213, and a connecting piece portion 214 that connects the proximal ends of the two.

The first shutter plate portion 212 is formed to have a rectangular portion that is narrow and long enough to close the first opening 206 of the lower half 204. The proximal end of the first shutter plate 212, which is connected to the connecting piece 214, has an engagement groove 216 formed on the outer surface of the lower half 204. A claw 217 is bent toward the second shutter plate portion 213 side. The shutter member 211 can be attached to the front surface 209 of the cartridge 203 by engaging the engagement claw 217 with the slide guide groove 216.
The sliding direction along the cartridge 203 is regulated and the cartridge 203 is prevented from coming off. On the other hand, the second shutter plate portion 213 is formed into a wide rectangular shape that is large enough to close at least the second opening.

[0029]Then, each of the shutter plate parts 212, 21
The connecting piece 214 that connects the cartridge 20
It is formed to have a width approximately equal to the thickness of No. 3. This connecting piece portion 214 connects to the front portion 20 of the cartridge 203.
By slidingly contacting the shutter member 21 along the
1 so that it can be slid stably. and,
The connecting plate portion 214 is provided such that one end side protrudes further in the one side direction than the portions of the shutter plate portions 212 and 213 that close the respective openings 206. One end side portion of this connecting piece portion 214 is connected to the first opening 20 when the shutter member 211 is slid.
6 and the second opening are located at positions corresponding to these openings when the lids are opened. The upper half 205 and the lower half 204 are connected to one end of the connecting piece 214.
A notch is formed in each of the openings 206 so that the notch recesses 206a and 210a, which are formed corresponding to the respective openings 206, are exposed to the front side. That is, the connecting piece portion 2
14 is formed with a narrow width so that it is easy for the magnetic head device and the optical pickup device to enter the cartridge 203 in close proximity to the recording disk 202. I'm used to it.

Furthermore, the connecting piece 214 is provided with a spring locking piece to which one end of a torsion coil spring (not shown) disposed inside the cartridge 203 is locked. This torsion coil spring is connected to the shutter member 211.
is constantly biased to move in the direction of closing the first opening 206 and the second opening. This spring locking piece is attached to the first and second shutter plate portions 212, 21.
3, and is bent toward the inside of the cartridge 203 so as to be substantially parallel to the torsion coil spring 3, and one arm portion of the torsion coil spring is secured to the tip end thereof. The other arm of the torsion coil spring is
It is latched to a corner of the front side inside the cartridge 203.

The shutter member 211 is located at a position where the first opening 206 and the second opening are closed, as shown in FIG. 27, and at a position where these openings are opened, as shown in FIG. The cartridge 203 is slidable in the direction along the front surface 209 of the cartridge 203 as indicated by the arrow C in FIG.

A shutter opening pin is provided on the front surface 209 of the cartridge 203 when the shutter member 211 is moved by a shutter opening pin of a disc cartridge loading device which will be described later in the disc recording apparatus according to the present invention. a shutter opening pin fitting part 219 for fitting the shutter release pin into the opening part 219 so that the first opening part 206 and the second opening part are held in an open state;
is formed with a notch. This shutter opening pin insertion part 219 is located at a position where one end of the connecting piece part 214 of the shutter member 211 faces when the first opening 206 and the second opening are opened. half 20
It is formed as a cutout groove extending from the main surface portion of No. 5 to the lower main surface portion 207.

The lower half 204 also has a pair of positioning pins that engage with positioning pins for positioning the horizontal mounting position of the disk cartridge 201 when the disk cartridge 201 is installed in the disk recording device. Positioning pin engagement holes 225 and 226 are provided. Furthermore, an erroneous erasure prevention member 227 is attached to the lower half 204 near one of the positioning pin engagement holes 226 for indicating whether or not an information signal can be written to the recording disk 202. Furthermore, cartridge inject pin fitting recesses 228 into which cartridge inject pins of the disk cartridge loading device fit are formed near the front of both side surfaces of the cartridge 203.

[2] Configuration of the disc recording device according to the present invention (FIGS. 1 to 6) Next, the configuration of the disc recording device according to the present invention, which uses the above-mentioned disc cartridge 201 as a recording medium, will be described.

[0035] This disc recording device is configured to include various mechanisms and means sufficient to allow the disc cartridge 201 to be mounted at a predetermined mounting position and to write information signals onto the recording disc 202 of this disc cartridge 201. ing.

That is, this disk recording device is a disk cartridge loading device that mounts the disk cartridge 201 at the mounting position on the chassis 6 and places and mounts the recording disk 202 on the disk table 11 of the rotary drive device 2. , the recording disk 202 is mounted on the disk table 11 and rotated, and is moved in the radial direction of the recording disk 202 across the inner and outer peripheries to write and read information signals to and from the recording disk 202. Mechanisms such as an optical pickup device 4 and a magnetic head lifting mechanism 5 for supporting a magnetic head device 20 that applies an external magnetic field when writing information signals to the recording disk 202 are provided.

[2-a] Configuration of the cartridge mounting section, rotational drive device, and optical pickup device (FIGS. 1 to 3) On the chassis 6, as shown in FIGS. 1 to 3, the rotational drive device 2, The optical pickup device 4 and mechanical parts such as a movement operation mechanism for the optical pickup device 4 are arranged to constitute the cartridge mounting section 1. The cartridge mounting section 1 is configured as a mechanism in which the disk cartridge 201 is mounted on the upper surface side of the chassis 6. This cartridge mounting portion 1 includes a positioning pin engagement hole 2 provided in the disk cartridge 201.
The disk cartridge positioning pins 7 and 8 are installed on the chassis 6 so as to engage with the disk cartridges 25 and 226. When the disk cartridge 201 is installed in the cartridge mounting section 1, the disk cartridge positioning pins 7 and 8 engage with the positioning pin engagement holes 225 and 226, so that the disk cartridge 201 is positioned at a predetermined mounting position with respect to the chassis 6. is positioned and installed. The cartridge mounting section 1 also has height reference pins 7a and 8a planted on the chassis 6 for holding the disk cartridge 201 at a predetermined height with respect to the chassis board 6. There is.

A rotary drive device 2 for rotating the recording disk 202 of the disk cartridge 201 mounted in the cartridge mounting section 1 is disposed approximately at the center of the chassis 6 constituting the cartridge mounting section 1. There is. This rotation drive device 2 includes a spindle motor 9. The spindle motor 9 is attached to the lower surface of the chassis 6, and has a drive shaft that becomes a spindle shaft 10 protruding from the upper surface of the chassis 6. The recording disk 2 is disposed on the tip side of the spindle shaft 10.
A disk table 11 on which 02 is mounted is attached. A disk adsorption magnet 12 is disposed on the disk table 11 so that the chucking hub 202a of the recording disk 202 can be held by magnetic adsorption force.

Furthermore, an optical pickup device 4 is disposed on the chassis 6. This optical pickup device 4 has an objective lens 13 facing the signal recording surface of the recording disk 202 mounted on the disk table 11 in order to focus and irradiate the signal recording surface with a laser beam. It is arranged so that The optical pickup device 4 is slidably supported by a pair of feed guide shafts 15 and 16 that are spanned within an optical pickup device mounting hole 14 formed approximately in the center of the chassis 6. The optical pickup device 4 supported in this way is attached to the optical pickup device mounting hole 14.
It is composed of a pair of optical pickup device drive magnets 17 and 18 and a drive coil 19 disposed inside.
A so-called linear motor device is operable to move the recording disk 202 in the radial direction along the feed guide shafts 15 and 16 over the inner and outer circumferences of the recording disk 202 mounted on the disk table 11. ing.

[2-b] Configuration of magnetic head device and magnetic head elevating mechanism (FIGS. 1 to 3, FIGS. 7 to 8, and 12
, FIGS. 23 and 28) The optical pickup device 4 includes, as shown in FIG.
A magnetic head device 20 is connected to the optical pickup device 4, which is moved radially across the inner and outer circumferences of the recording disk 202 in synchronization with the magnetic head device 20. The magnetic head device 20 includes a coil, a core, etc. for generating a magnetic field that applies a magnetic field of a predetermined intensity to the signal recording layer of the recording disk 202. The magnetic head 20 is slidably supported by a magnetic head support frame 23 serving as a magnetic head support member constituting a magnetic head elevating mechanism 5 to be described later.

The magnetic head device 20 is provided with a distance sensor (not shown) for keeping the distance between the magnetic head device 20 and the recording disk 202 constant. Further, as shown in FIG. 3, this magnetic head device 20 is provided with a pair of connecting members 21a and 21b that hang down toward the optical pickup device 4, and the lower ends of these connecting members 21a and 21b are connected to the optical pickup device 4. It is designed to be connected to 4. Therefore, the magnetic head device 20 is slid in the radial direction over the inner and outer peripheries of the recording disk 202 in synchronization with the optical pickup device 4, and always moves the coil section through the recording disk 202 to the optical pickup. It is made to face the objective lens 13 of the device 4.

The magnetic head device 20 configured as described above is moved toward and away from the main surface of the recording disk 202 in a direction substantially perpendicular to the main surface of the recording disk 202 by the magnetic head lifting mechanism 5. The magnetic head lifting mechanism 5 includes:
It consists of the magnetic head support frame 23 that slidably supports the magnetic head 20, and a magnetic head lift lever 24 that moves the magnetic head support frame 23 in a direction substantially perpendicular to the main surface of the recording disk 202. The magnetic head support frame 23 is formed into a substantially rectangular frame shape.

The magnetic head support frame 23 is located on the chassis 6 and is attached to the disk cartridge 201.
A pair of elevating shafts 25 installed in a position that does not contact the
, 26 so as to be movable in the vertical direction, that is, in the direction toward and away from the chassis 6 as indicated by arrow D in FIG. On the side of the magnetic head support frame 23 facing the optical pickup device 4, the axial direction is parallel to the main surface of the recording disk 202, and the axial direction is oriented in the radial direction of the recording disk 202. A pair of support shafts 27 and 28 are attached. These support shafts 27 and 28 are provided with the magnetic head device 2.
0 indicates each of the support shafts 27, 2 indicated by arrow E in FIG.
8, that is, along the radial direction of the recording disk 202. Further, one of the elevating shafts 2 of the magnetic head support frame 23
An elevating engagement pin 29 is provided at a position near 6 to be slidably engaged with a magnetic head elevating lever 24 for elevating the magnetic head support frame 23 . The elevating engagement pin 29 is attached to the tip side of an elevating engaging pin mounting member 30 that is provided to hang down from one side of the magnetic head support frame 23 toward the chassis 6 side.

Further, on the rear side of the magnetic head support frame 23, as shown in FIGS. 12, 23 and 28,
A screw hole 23a into which the height adjustment screw 110 is screwed is provided. The screw hole 23a is formed through the magnetic head support frame 23 in a direction substantially perpendicular to the chassis 6. A portion of the screw hole 23a on the chassis 6 side is slightly reduced in diameter and has a thread groove formed therein to form a threaded portion 23b.

The height adjustment screw 110 is screwed into the screw hole 23a. This height adjustment screw 1
10 has a threaded portion 110c at one end, a cylindrical portion 110b with a slightly enlarged diameter at the other end, and a flange portion 110a with a further enlarged diameter near the one end. The upper surface of the flange portion 110a, that is,
The other end of the height adjustment screw 110 is provided with a groove or a hole for engagement with a driver.

The height adjustment screw 110 has one end 110
d is on the side of the chassis 6, and the screw portion 110c is screwed into the screw portion 23b of the screw hole 23a. The one end portion 110d is connected to the magnetic head support frame 23.
It protrudes toward the chassis 6 side from the lower surface part of. The amount by which the one end 110d of the height adjusting screw 110 protrudes from the lower surface of the magnetic head support frame 23 can be determined by rotating the height adjusting screw 110, so that the threaded portions 110c and 23b can be screwed into each other. It can be varied by adjusting the amount.

A compression coil spring 111 is fitted in a slightly compressed state between the flange portion 110a and the upper end of the threaded portion 23b of the screw hole 23a. This compression coil spring 111 is attached to the height adjustment screw 110.
is biased in a direction away from the chassis 6 to prevent so-called play between the threaded portions 110c and 23b.

The magnetic head elevating lever 24 that slides into engagement with the elevating engaging pin 29 to operate the magnetic head support frame 23 up and down is connected to the elevating engaging pin 29.
It is arranged on the chassis 6 at a position corresponding to . This magnetic head elevating lever 24 is connected to a support shaft 31.
It is rotatably supported with respect to the chassis 6 via the support shaft 31 as shown by arrow F in FIG. The magnetic head elevating lever 24 has a fan-shaped part 32 which is formed in a fan shape, and a main part of the fan shape is supported by the chassis 6 via the support shaft 31, and a fan-shaped part 32 that rises from the free end side part of the fan part 32. It consists of a lifting cam section 33. The fan-shaped portion 32 has a
A minute protrusion 32a is provided so as to make point contact with the chassis 6 to facilitate rotation of the fan-shaped portion 32 while sliding on the chassis 6. The fan-shaped portion 32 has a lever operating pin 3 fitted into an elevating lever operating member provided on an eject plate of a disk cartridge loading device, which will be described later.
4 have been planted.

The elevating cam portion 33 is a so-called end cam, and the upper end of the rising wall is slidably engaged with the elevating engagement pin 29. This elevating cam portion 33 has a parallel portion 33 parallel to the chassis 6.
a, and an inclined portion 33b that slopes from the parallel portion 33a toward the fan-shaped portion 32 side.

[0050] The above-mentioned lifting engagement pin 2 is attached to the above-mentioned parallel part 33a.
9 are abutted and engaged, that is, in the eject state, as shown in FIGS. 7 and 12, the magnetic head support frame 23 is in a position separated from the recording disk 202, and at least the disk cartridge 201
The magnetic head device 20 is held in a position where it does not come into contact with the disk cartridge 201 when the disk cartridge 201 is inserted.

On the other hand, in a state in which the lifting engagement pin 29 is abuttingly engaged with the lower end side of the inclined portion 33b, that is, in a loading state, as shown in FIGS. 8 and 23, the magnetic head support The frame 23 is located close to the recording disk 202 and is held at a position where the magnetic head device 20 is at a height that allows application of a magnetic field to the signal recording layer of the recording disk 202. At this time, one end 110d of the height adjustment screw 110 protrudes from the lower surface of the magnetic head support frame 23.
However, the positioning reference section 11 provided on the chassis 6
2 to determine the height position of the magnetic head support frame 23. That is, the height position of the magnetic head support frame 23 from the chassis 6 in this loading state can be adjusted as shown in FIGS. It is adjusted in the direction toward and away from the chassis 6, as shown by arrow A in 28.

The magnetic head device 20 is slidably supported by the magnetic head support frame 23 and can be operated to move in the radial direction of the recording disk 202 over the inner and outer circumferences of the recording disk 202. In addition, since the elevating engagement pin 29 provided on the magnetic head support frame 23 is slidably engaged with the elevating cam portion 33, when the magnetic head elevating lever 24 is rotated, the recording disk 202 It is operated toward and away from the signal recording surface in a direction substantially perpendicular to it.

[2-c] Configuration of disk cartridge loading device (FIGS. 1 to 6, and FIGS. 9 to 25)
) The disc cartridge loading device of this disc recording apparatus is a device that mounts the disc cartridge 201 at a predetermined mounting position of the cartridge mounting section 1, that is, performs a so-called loading operation. This disk cartridge loading device is shown in FIGS. 1 to 6.
As shown in the figure, this disk cartridge loading device loads a disk cartridge 2.
01 is inserted into this disk cartridge 201.
It has a cartridge holder 35 that holds the cartridge. Further, this disk cartridge loading device is mounted on the chassis 6 and holds the cartridge holder 3.
a cartridge holder support frame 36 supporting the cartridge holder 5 so as to be movable in a direction toward and away from the chassis 6; and a cartridge holder support frame 36 supporting the cartridge holder 35 so as to be slidable in a direction parallel to the chassis 6;
and an eject plate 37 for moving the ejector in the direction toward and away from the chassis 6.

As shown in FIGS. 5, 9 and 10, the cartridge holder 35 is constructed by bending a plate-shaped material, has a space into which the disk cartridge 201 can be inserted, and has a front side and a lower side. It is constructed in the form of an open, thin casing. This cartridge holder 3 serves as an entrance when inserting the disk cartridge 201 into the cartridge holder 35.
The cartridge insertion slit portion formed on the front side of 5 has a width of 6.5 mm and a length of 90.5 mm. Both side wall portions of the cartridge holder 35 that face each other form cartridge holding portions 39 and 40 that hold the disk cartridge 201 and have a substantially U-shaped cross section. A pair of left and right guide pins 41, 42 and 43, 44 are provided protruding from the outer side surfaces of these cartridge holding parts 39, 40 on the front side and the rear side, respectively. Note that these guide pins 41, 42, 43, and 44 are inserted into and engaged with guide grooves provided in a cartridge holder support frame 36 and cam grooves provided in an eject plate 37, which will be described later.

A shutter opening arm 47 is attached to the upper plate portion 45 of the cartridge holder 35, with its base end rotatably supported. The cartridge holder 35 is located on the tip side of the shutter release arm 47.
A shutter release pin 46 is implanted to move the shutter member 211 by sliding in contact with the front surface 209 of the disk cartridge 201 inserted into the disc cartridge 201 .

The shutter opening arm 47 is formed into a flat plate shape, and its base end is rotatably supported by a first support shaft 48 approximately in the center of the upper plate portion 45 . The shutter opening pin 46, which is implanted on the tip side of the shutter opening arm 47, is attached to the upper plate portion 45 along an arcuate locus of movement about the first support shaft 48 of the shutter opening pin 46. Shutter release pin guide groove 49
The cartridge holder 35 is suspended within the cartridge holder 35 through the cartridge holder 35. The shutter opening pin guide groove 49 is formed to have a groove width slightly larger than the outer diameter dimension of the shutter opening pin 46 in order to facilitate movement of the shutter opening pin 46. Further, on the proximal end side of the shutter release pin 46, a lower side of the upper plate portion 45 is provided.
A ring-shaped shutter release pin escape prevention member 50 is externally fitted. The shutter release pin escape prevention member 50 is a so-called washer large enough to straddle the shutter release pin guide groove 49, and is externally fitted onto the shutter release pin 46 and attached to the lower surface of the upper plate portion 45. It is attached so as to be substantially in contact with the portion 45b. This shutter release pin escape prevention member 50 allows the shutter release pin 4 to
6 is configured to be able to smoothly move within the shutter release pin guide groove 49 without being pushed out above the cartridge holder 35. Therefore, the shutter release pin 46 is connected to the front surface 20 of the cartridge 203.
9, and the shutter member 211 can be moved without riding on the upper side of the shutter member 211.

The shutter opening arm 47, which is rotatably mounted in this manner, moves the shutter opening pin 46, indicated by arrow G in FIG. 5, to the front side of the cartridge holder 35 by the first tension coil spring 51. It is rotationally biased in the direction of movement. As shown in FIGS. 5 and 9, the first tension coil spring 51 has one end locked to a first spring locking piece 51a formed by cutting and raising the shutter opening arm 47, and the other end By being locked by a second spring locking piece 51b cut and raised on a cartridge inject arm 57, which will be described later, the shutter opening pin 46 is moved to the front end position of the shutter opening pin guide groove 49. That is, it is located at the initial position. The second spring locking piece 51b is provided near a third support shaft 68 that rotatably supports the cartridge inject arm 57 on the cartridge holder 35.

Further, when the disk cartridge 201 is inserted into the cartridge holder 35, the cartridge 203 of the disk cartridge 201 is placed on the upper plate portion 45 of the cartridge holder 35 on the inner side of the cartridge holder 35. A cartridge injection mechanism 53 is provided for forcibly drawing the cartridge into the cartridge. This disk cartridge injection mechanism 53 is
A cartridge inject member 55 having a cartridge inject pin 54 that fits into a cartridge inject pin insertion hole 228 provided in the disk cartridge 201, and the cartridge holder 35.
The cartridge injection lever 56 is comprised of a cartridge inject lever 56 that is slidably supported on the cartridge inject member 55 and rotatably supports the cartridge inject member 55, and a cartridge inject arm 57 that is rotatably engaged with the cartridge inject lever 56.

[0059] The cartridge inject lever 56
is engaged with a pair of guide shafts 61 and 62 installed on the upper surface part 45a of the upper plate part 45 of the cartridge holder 35, as shown by the arrow I in FIG.
The disk cartridge 201 is slidable in a direction along the insertion and ejection direction with respect to the cartridge holder 35. This cartridge inject lever 56 is provided with elongated slide guide grooves 63 and 64 at positions corresponding to the guide shafts 61 and 62, respectively. are inserted into the cartridge holder 35 in a corresponding manner and are slidably supported by the cartridge holder 35.

[0060] The cartridge inject lever 56
A third spring locking piece 65 to which the other arm portion of a first torsion coil spring 59 to be described later is locked is cut and raised near the rear end side of the cartridge holder 35. At the same time, an attachment hole 66 for attaching the second support shaft 58 is bored. An engaging pin 69 of the cartridge inject arm 57 for slidingly operating the cartridge inject lever 56 is rotatably engaged on the front end side of the cartridge inject lever 56, which is the front side of the cartridge holder 35. A matching notch 67 is provided.

The cartridge inject member 55 is bent into a substantially U-shape, and has one upper end facing the second end toward the rear end of the cartridge inject lever 56.
It is rotatably supported via a support shaft 58 . The other end of the cartridge inject member 55, which is the lower side, extends toward the front side of the cartridge holder 35 to form a substantially L-shaped extension portion 55a. A first torsion coil spring 59 is attached to the second support shaft 58.
The coil part is wound. The first torsion coil spring 59 rotates the cartridge inject member 55 in a direction in which the cartridge inject pin 54 moves outward of the cartridge holder 35 as indicated by arrow H in FIG. It is strong. That is, one arm of the first torsion coil spring 59 is locked to the third spring locking piece 60 of the cartridge inject member 55, and the other arm is locked to the third spring locking piece 60 of the cartridge inject lever 56. It is locked by a fourth spring locking piece 65. The distal end side of the extending portion 55a projects further outward than the cartridge holding portion 40 of the cartridge holder 35. The cartridge inject pin 54 is installed on the distal end side of the extending portion 55a. This cartridge injection pin 54 is
The cartridge holder 35 is urged to move outwardly by the first torsion coil spring 59 via the cartridge injection member 56 .

[0062] The cartridge inject arm 57
is formed as a flat plate-like arm, and is rotatably supported approximately at the center by the upper plate portion 45 of the cartridge holder 35 via a third support shaft 68 . The cartridge inject arm 57 is located close to and substantially parallel to the shutter opening arm 47, and is disposed on the front side of the cartridge holder 35 with respect to the shutter opening arm 47.

[0063] This cartridge inject arm 57
At one end side, the cartridge inject lever 5 is installed.
An engagement pin 69 that engages with the engagement notch 67 of No. 6 is planted, and a fifth spring locking piece 71 that locks one end of the second tension coil spring 70 is cut and raised. There is. On the other hand, the other end of the cartridge inject arm 57 is engaged with an eject plate 37, which will be described later, so that the cartridge inject arm 57 is positioned at its initial position and rotated by the eject plate 37. A positioning protrusion 72 is provided.

The cartridge inject arm 57 is moved by the second tension coil spring 70 in the direction of moving the cartridge inject lever 56 toward the rear of the cartridge holder 35, as shown by arrow J in FIG. It is rotationally biased. That is,
The second tension coil spring 70 has one end locked to the fifth spring locking piece 71 of the cartridge inject arm 57, and the other end to the cartridge holder 35.
It is locked to a sixth spring locking piece 73 that is cut and raised on the upper surface portion 45a side of the upper plate portion 45.

Further, the cartridge holder 35 includes:
An incorrect insertion prevention lever 75 is rotatably mounted to prevent the disc cartridge 201 from being inserted into the cartridge holder 35 in the wrong direction. The incorrect insertion prevention lever 75 has its proximal end placed near one side edge of the upper surface portion 45 of the cartridge holder 35, that is, near the one cartridge holding portion 40, via the fourth support shaft 76. Rotatably supported. An erroneous insertion prevention pin 77 is installed on the tip side of the erroneous insertion prevention lever 75. This erroneous insertion prevention pin 77 is suspended into the cartridge holder 35 through a notch 78 that is open on one side of the cartridge holder 35 .

This erroneous insertion prevention lever 75 is biased by a third tension coil spring 79 in a direction to move the distal end side inward of the cartridge holder 35, as shown by arrow K in FIG. There is. That is, as shown in FIG. 9, the third tension coil spring 79 is locked at one end by a seventh spring locking piece 80 formed by cutting and raising the incorrect insertion prevention lever 75, and at the other end. It is locked to an eighth spring locking piece 81 formed by cutting and raising the upper plate portion 45 of the cartridge holder 35 . Note that when the incorrect insertion prevention lever 75 is biased by the third tension coil spring 79, it comes into contact with a positioning protrusion 82 that protrudes from the opening periphery of the notch 78 of the cartridge holder 35. The erroneous insertion prevention pin 77 is placed in the initial position.

Further, the upper plate portion 45 of the cartridge holder 35 has a first notch portion 83 from which an eject plate locking lever 103 (described later) for holding the eject plate 37 at the eject position faces, and a first notch portion 83 for holding the eject plate 37 at the eject position. A second notch 84 is formed that faces the device 5. Further, the cartridge holder 35 is attached to the cartridge holder support frame 36 on the upper plate portion 45 of the cartridge holder 35.
When supported by the cartridge holder support frame 36, various structural members such as the shutter release lever 47, the cartridge inject arm 57, and the incorrect insertion prevention lever 75 provided on the upper plate portion 45 come into contact with the cartridge holder support frame 36. A bulge 88 is formed to prevent them from coming into contact with each other. The bulging portion 88 is formed in a rectangular shape having a height at least equal to or greater than the thickness of the various constituent members, located at the front side of the upper plate portion 45 of the cartridge holder 35, that is, near the insertion opening for the disk cartridge 201. The protrusion is formed with its longitudinal direction perpendicular to the direction in which the disc cartridge 201 is inserted.

Furthermore, as shown in FIG. 10, the disk cartridge 201 inserted into the cartridge holder 35 is pushed down toward the chassis 6 on the lower surface 45b of the upper plate 45 of the cartridge holder 35. A cartridge push-down member 89 is formed protruding from the front surface of the cartridge 203 to prevent the shutter release pin escape prevention member 50 from coming into contact with it. The cartridge push-down member 89 has a protrusion amount at least equal to or greater than the thickness of the shutter release pin escape prevention member 50 at a position near the shutter release pin 46 in the initial position, so that the upper plate portion 45 is on the lower side. It is formed as a bulge.

[0069] The upper plate portion 45 of the cartridge holder 35 has a position restriction so that the disc cartridge 201 to be inserted into the cartridge holder 35 is not inserted further rearward than the position where the loading operation is possible. Cartridge position regulating piece 90 for
91 is provided. This cartridge position regulating piece 9
0,91 indicates the second position along the rear edge of the upper plate portion 45.
The cartridge holder 35 is provided in the vicinity of the open end edge of the notch 84 in a bent manner so as to hang downward from the cartridge holder 35 .

Further, the side wall portion of the one cartridge holding portion 40 of the cartridge holder 35 holds the cartridge inject pin 54 in the initial state when in the eject state, and also holds the cartridge inject member 55. A cartridge inject pin position regulating piece 92 for guiding the cartridge inject pin 54 toward the inside of the cartridge holder 35 when moving rearward is bent so as to be slightly inclined outward. There is. This cartridge inject pin position regulating piece 92 is connected to the disk cartridge 20.
1 is inserted into this cartridge holder 35, the cartridge inject pin 54 is moved outward from the movement locus of the disc cartridge 201 so that the cartridge inject pin 54 does not come into contact with the disc cartridge 201. It is designed to be supported in a position where it escapes.

As shown in FIG. 4, the cartridge holder support frame 36 that supports the cartridge holder 35 has an open front side and a lower side with a space large enough to hold the cartridge holder 35. It is formed into a housing shape. This cartridge holder support frame 3
Reference numeral 6 designates cartridge holder support walls 93 and 94, in which opposite side wall portions support the cartridge holder 35 so as to be movable toward and away from the chassis 6.

[0072] Each of the above cartridge holder support walls 93, 9
4 is provided with a pair of guide grooves 95, 97, 96, 98 at the front side position and the rear side position. The front guide pins 41 and 43 provided on the cartridge holder 35 are inserted into and engaged with the front guide grooves 95 and 97 . The rear guide grooves 96 and 98 are connected to the rear guide pins 42 and 4 provided in the cartridge holder 35.
4 are slidably engaged. These guide grooves 95, 96, 97
, 98, the guide grooves 95, 97 provided at the front side of the cartridge holder 35 have a width sufficient to allow the guide pins 41, 43 to pass therethrough, and are connected to the spindle shaft 10 of the disk rotation drive device 2. It is cut out and formed as a slit groove in a parallel direction. On the other hand, the guide grooves 96 and 98 at the rear side are formed as wide grooves, and are cut out with end edges parallel to the spindle shaft 10 of the disk rotation drive device 2. The rear guide pins 42 and 44 are inserted into the wide rear guide grooves 96 and 98.
, 98 so as to slide into and engage with the rear edge portions 96a, 98a. That is, the guide pins 41 and 43 on the front side are inserted into and engaged with the corresponding guide grooves 95 and 97, and the guide pins 42 and 44 on the rear side are inserted into one side edge 96a of the guide grooves 96 and 98 on the rear side. , 98a.

[0073]The above guide grooves 95, 96, 97
, 98 are provided on the cartridge holder support walls 93, 9.
Attachment portions 99 for fixing the cartridge holder support frame 36 to the chassis 6 are provided on both edges of the lower end side of 4.
, 100 and 101, 102 are provided so as to extend inwardly facing each other. This cartridge holder support frame 36 has the above-mentioned mounting portions 99, 100, 1.
01 and 102 are fixedly supported on the chassis 6 by being screwed to the chassis 6.

Furthermore, this cartridge holder support frame 36
An eject plate locking lever 103 for holding the eject plate 37 at the eject position against the biasing force of a tension coil spring 139, which will be described later, is rotatably attached to the eject plate locking lever 103. The eject plate locking lever 103 is rotatably supported at its base end by the cartridge holder support frame 36 via a fifth support shaft 104. and,
A locking pawl 103a is provided on the distal end side of the eject plate locking lever 103 for locking the locked member 124 attached to the eject plate 37 and holding the eject plate 37 at the eject position. The locking claw 1 is located on the tip side of the eject plate locking lever 103.
A pivot pin 105 for rotating the eject plate locking lever 103 is installed near the base end of the lever 03a. The pivoted pin 105 is suspended into the cartridge holder 35 through a first notch 83 that is open on one side of the rear side of the cartridge holder 35 . Note that the tip of this rotated pin 105 is
The disk cartridge 201 is suspended at least to a position where it comes into contact with the front surface of the cartridge 203 of the disk cartridge 201 inserted into the cartridge holder 35 .

[0075] Then, the eject plate locking lever 10
3, the second torsion coil spring 106 causes the rotated pin 105 to rotate in a direction that opposes the insertion operation of the disk cartridge 201, as shown by arrow L in FIG. It is rotationally biased in the direction of moving it forward. That is, the second torsion coil spring 106 connects one arm portion to the pivoted pin 105.
The other arm portion is locked to a ninth spring locking piece 107 formed by cutting and raising the cartridge holder support frame 36 . Then, the locking claw 1
03a is released from the eject plate locking member 124, the eject plate locking lever 103
A lever rotation prevention piece 103b formed by cutting and raising the eject plate locking lever 103 is locked to the cartridge holder support frame 36, so that rotation is restricted at a predetermined position.

Note that the cartridge holder support frame 36
includes a third notch 108 facing the cartridge inject lever 56, an opening 109 facing the magnetic head device 5, and an eject plate support for slidably supporting an eject plate 37, which will be described later, in the front-rear direction. Pins 113, 114, 115, and 116 are provided.

The eject plate 37 is slidably attached to the cartridge holder support frame 36 constructed as described above. The above eject plate 37
As shown in FIG. 6, a flat slide portion 117 slides in sliding contact with the cartridge holder support frame 36.
and a pair of side wall portions 118 and 119 that are provided so as to hang down toward the chassis 6 from opposite side edge portions of the slide portion 117. This slide portion 117 includes the cartridge holder support frame 36.
Eject plate support pins 113, 114, 1 provided in
15 and 116 are respectively inserted into and engaged with the slide grooves 120
, 121, 122, and 123 are provided. These slide grooves 120, 121, 122, 123 are located at positions corresponding to the eject plate support pins 113, 114, 115, 116, respectively, with the longitudinal direction being the insertion operation direction of the disk cartridge 201, that is, the front-rear direction. , is formed in a slit shape.

A fourth tension coil spring 139 is attached to each of the side walls 118 and 119 to constantly bias the eject plate 37 forward. Each of these tension coil springs 139 has one end secured to the side wall portions 118, 119, and the other end secured to the chassis 6.
By being locked by spring locking pins 140 and 141 set up in the front side, the eject plate 37 is always elastically biased toward the front side, that is, the entrance side where the disk cartridge 201 is inserted. .

The slide portion 117 also has an eject plate locking member 1 that is locked to an eject plate locking lever 103 provided on the cartridge holder support frame 36.
24 is installed. This eject plate locking member 1
24 is the locking claw 1 of the eject plate locking lever 103.
03a, and is rotatably attached to the lower surface of the slide portion 117 with a screw 125 through a hole provided in the center of the cylinder.

Furthermore, the sliding portion 117 has a fifth notch 126 facing the cartridge inject lever 56 and an opening 1 facing the magnetic head device 5.
27, and a positioning protrusion 72 of the cartridge inject arm 57 provided on the cartridge holder 35.
A locating opening 128 is provided for engaging.

An inject arm positioning protrusion 128a is cut and raised at the edge of the positioning opening 128 on the front side of the cartridge holder 35. This inject arm positioning protrusion 128a comes into contact with the outer peripheral surface of the positioning protrusion 72 that is inserted into and engaged with the positioning opening 128 when the eject plate 37 is at the rear ejection position. Together,
Resisting the biasing force of the second tension coil spring 70,
The cartridge inject arm 57 is positioned at an initial position. The inject arm positioning protrusion 128a comes into contact with the outer peripheral surface of the positioning protrusion 72 when the disk cartridge 201 is inserted into the cartridge holder 35 and the eject plate 37 slides forward. The engagement is released and the cartridge inject arm 57 is rotated by the biasing force of the second tension coil spring 70.

At the rear side of the slide portion 117, there is an operated portion 129 into which the eject plate slide pin 130 of the eject plate slide drive mechanism 38 for sliding the eject plate 37 to the eject position is inserted and engaged. It is provided. The operated portion 129 is formed as a substantially square flat plate-like body, and the slide portion 1
It is provided as a part of the rear side part of 17. This operated portion 129 includes the eject plate slide pin 13.
The pin sliding hole 129a into which the pin 0 is inserted and engaged is formed as a substantially circular through hole.

As shown in FIG. 2, the eject plate slide mechanism 38 having the eject plate slide pin 130 inserted into and engaged with the pin sliding hole 129a is connected to an eject motor (not shown) provided below the chassis 6. , an eject plate operating gear 13 provided with an eject plate slide pin 130 rotationally driven by this motor.
1. The eject motor and the eject plate operating gear 130 are connected by a plurality of connecting gear mechanisms 132 of different sizes. The eject plate slide pin 130 is installed at an eccentric position of the eject plate operating gear 131.

When an eject operation button (not shown) is operated, this eject plate slide mechanism 38 drives the eject motor to move the eject plate operation gear 131.
drives the rotation. Then, the eject plate 37 allows the eject plate slide pin 130 to fit into the pin sliding hole 1.
By slidingly engaging the inner peripheral edge of 29a, the fourth
It is slid rearward against the biasing force of the tension coil spring 139 to reach the eject position. The eject plate 37 in the eject position is held at the eject position by the eject plate locking member 124 being locked by the eject plate locking lever 103. Note that, after the eject plate 37 is brought to the eject position, the eject plate slide pin 130 is moved to a forward position where it does not come into sliding contact with the pin sliding hole 129a, and then stopped. .

Side wall portions 118 and 119 provided on opposite sides of the slide portion 117 have cam grooves 135 and 136 for moving the cartridge holder 35 toward and away from the chassis 6, respectively. 137
, 138 are provided, respectively. These cam grooves 13
5, 136, 137, 138 are horizontal portions 135a, 136a, 137a, 138a parallel to the chassis 6;
First sloped portions 135b, 136b are sloped gently toward the rear from the horizontal portions 135a, 136a, 137a, 138a so as to approach the chassis 6 side.
, 137b, 138b, and a second inclined portion 135c which is further steeply inclined towards the chassis 6 toward the rear side.
136c, 137c, and 138c.

The cartridge holder 35 is supported by inserting the guide pins 41, 42, 43, 44 into the cam grooves 135, 136, 137, 138 formed in this manner. This cartridge holder 3
5, when the eject plate 37 is moved in the front-rear direction parallel to the chassis 6, the cam grooves 135, 13
6, 137, 138 with guide pins 41, 42, 43, 4
4 is guided and operated to move toward and away from the chassis 6.

A magnetic head elevating lever operating member 142 is protruded from the rear side of one side wall portion 118 of the eject plate 37 and extends inward. The magnetic head elevating lever operating member 142 engages with the lever operating pin 34 of the magnetic head elevating lever 24, and rotates the magnetic head elevating lever 24 in accordance with the sliding of the eject plate 37 in the front and back direction. do. A lever operating pin guide groove 142a into which the lever operating pin 34 is fitted and engaged is formed in the vicinity of the tip of the magnetic head elevating lever operating member 142 as an elongated groove. When the eject plate 37 is slid and the magnetic head elevating lever 24 is rotated, the magnetic head support frame 23 is moved in a direction substantially perpendicular to the signal recording surface of the recording disk 202. be done.

[3] Explanation of the operation of installing the disk cartridge (FIGS. 11 to 25) The operation of installing the disk cartridge 201 described above into the disk recording device according to the present invention configured as described above will be explained. .

[3-a] State before inserting the disk cartridge (FIGS. 11 to 14) First, the state before inserting the disk cartridge 201 will be described. To install the disk cartridge 201, operate an eject button (not shown) to move the eject plate 37 to the rear eject position as shown in FIGS. 11 to 14, and remove the cartridge holder 35 and the magnetic head. The magnetic head support frame 23 supporting the device 20 is moved to a raised position away from the disk table 11 of the disk rotation drive device 2.

That is, by operating the eject button, the eject plate slide mechanism 38 is driven, and the fourth
The eject plate 37 is slid rearward against the biasing force of the tension coil spring 139 and the second tension coil spring 70 tensioned on the cartridge inject arm 57. The eject plate locking lever 103 of the cartridge holder support frame 36 is connected to the eject plate locking member 12 provided on the eject plate 37.
4 is locked, and the eject plate 37 is held at the eject position.

At this time, the positioning protrusion 72 of the cartridge inject arm 57 that is inserted into and engaged with the positioning opening 128 of the eject plate 37 is inserted into the inject arm positioning protrusion on the front side of the positioning opening 128. It comes into contact with the piece 128a and is held at the initial position on the rear side. That is, the cartridge inject arm 57 is held at an initial position where the outer peripheral surface of the positioning protrusion 72 is brought into contact with the inject arm positioning protrusion 128a.

[0092] The cartridge inject lever 56 engaged with the cartridge inject arm 57 is placed in the initial position on the front side. At this time, the cartridge inject lever 56 causes the cartridge inject member 55 to abut and engage the cartridge inject pin 54 with the cartridge inject pin position regulating piece 92 of the cartridge holder 35 . That is, the cartridge inject pin 54 is held at a position away from the cartridge 203 of the disk cartridge 201 inserted into the cartridge holder 35 and away from the cartridge 203 .

The shutter release pin 46 is brought to the initial position by the first tension coil spring 51 stretched between the shutter release lever 47 and the cartridge inject arm 57. There is. On the other hand, the erroneous insertion prevention pin 77 is also connected to the erroneous insertion prevention lever 75 and the cartridge holder 35.
the third tension coil spring 7 stretched across the
9, the cartridge is at an initial position suspended within the cartridge holder 35.

The magnetic head support frame 23, which is in the eject position spaced apart from the chassis 6 in this manner, has the elevating engagement pin 29 in contact with the parallel portion 33b of the elevating cam portion 33 of the magnetic head elevating lever 24. are engaged. At this time, the magnetic head support frame 23 holds the magnetic head device 20 in a position where it does not come into contact with the disk cartridge 201 inserted into the cartridge holder 35.

[3-b] Description of the state in the middle of inserting the disc cartridge (FIGS. 15 to 20) Then, in the eject state as described above, the disc cartridge 201 is inserted into the shutter member 211.
The cartridge holder 35 is inserted into the cartridge holder 35 from the front side, with the direction in which it is attached being the front side.

When the disk cartridge 201 is inserted into the cartridge holder 35, the front corner of the cartridge 203 first comes into contact with the erroneous insertion prevention pin 77. At this time, disk cartridge 2
01 is inserted in the correct direction, the incorrect insertion prevention pin 77 is moved outward by the cartridge 203 by rotating the incorrect insertion prevention lever 75 as shown by arrow M in FIG. Then, the cartridge 203 can be inserted. On the other hand, if the disk cartridge 201 is inserted in the wrong direction, the erroneous insertion prevention lever 75 is not rotated, and the erroneous insertion prevention pin 7
7 prevents the insertion operation of the cartridge 203 into the cartridge holder 35.

When the disk cartridge 201 is further inserted into the rear side of the cartridge holder 35, as shown in FIG.
The shutter release pin 46 comes into contact with the front part 209 of 03. From this state, the disk cartridge 201
When inserted into the rear side of the cartridge holder 35, the shutter release pin 46 comes into contact with one end of the shutter member 211, as shown in FIG. Against the biasing force of the torsion coil spring, arrow N in Fig. 20
An opening 206 of the disk cartridge 201 shown in
, 210 in the direction of opening the lid. At this time, while extending the first tension coil spring 51, the shutter release arm 47 resists the biasing force of the first tension coil spring 51 and moves the shutter release pin 4
6 is the rear side.

When the disk cartridge 201 is further inserted into the rear side of the cartridge holder 35, the pivoted pin 105 of the eject plate locking lever 103, which is rotatably supported by the cartridge holder support frame 36, and the The front part 209 of the cartridge 203 comes into contact with it. The eject plate locking lever 103 is rotated by the cartridge 203 in a direction in which the rotated pin 105 is on the rear side as indicated by arrow O in FIG. 20, and the eject plate is locked by the locking pawl 103a. Member 124
Release the lock on. As a result, the eject plate 37 is slid forward by the fourth tension coil spring 139 stretched between the eject plate 37 and the chassis 6.

The eject plate 37 that has been slid forward in this way is attached to the inject arm positioning protrusion 1.
28a is released from the abutting engagement with the positioning protrusion 72. Therefore, the cartridge inject arm 57 is rotated by the biasing force of the second tension coil spring 70, and the cartridge inject lever 55 and the cartridge inject member 56 are
moved to the rear. Then, the cartridge 203
The cartridge inject pin 54, which has been held at a position on the outside of the movement trajectory of the cartridge 203, is guided by the cartridge inject pin position regulating piece 92 and moves inward of the cartridge holder 35.
The cartridge inject pin fits into the hole 228 of the cartridge.

Then, the cartridge inject member 55 is further moved rearward by the biasing force of the second tension coil spring 70, and moves the cartridge 203 rearward as shown by arrow P in FIG. , performs a so-called injection operation. The disk cartridge 201 is located at an injection position on the rear side of the cartridge holder 35, and each opening 206, 210 of the cartridge 203 is opened.

[3-c] Explanation of the state in which the disk cartridge has been installed (FIGS. 21 to 25) Then, as the eject plate 37 slides forward, the cartridge holder 35 is moved to the position shown in FIGS. 21 to 25. As shown in , the cam groove 13 of this eject plate 37
5, 136, 137, 138 each guide pin 41, 42
, 43, 44 are guided to move in a direction approaching the chassis 6. That is, the cartridge holder 35 has the guide pins 41, 42,
43, 44, the respective cam grooves 135, 136, 137,
138 and each guide groove 95, 96, 97, 98 of the cartridge holder support frame 36, and is supported by the eject plate 37 and the cartridge holder support frame 36.

When the cartridge holder 35 is moved in the direction approaching the chassis 6, the disk cartridge 201 is mounted at the mounting position on the cartridge mounting section 1. That is, the disk cartridge 201 is held with the cartridge 203 being regulated in position by the height positioning pins 7a, 8a provided on the chassis 6 and the disk cartridge positioning pins 7,8. In addition, the recording disk 20
2 is mounted on the disk table 11.

As the eject plate 37 slides forward, the magnetic head lift lever operating member 142 provided on the eject plate 37 moves the magnetic head lift lever 24 as indicated by arrow F in FIG. The magnetic head support frame 23 is rotated as shown in FIG.
As shown in FIGS. 23 and 24, it is operated to move toward the chassis 6.

[0104] Then, the magnetic head support frame 23
moves toward the chassis 6, and the eject plate 37 slides forward, so that one end 110d of the height adjustment screw 110 screwed into the magnetic head support frame, as shown in FIG. The magnetic head support frame 23 is brought into contact with the positioning reference portion 112 on the chassis 6 to determine the height position of the magnetic head support frame 23. At this time, the magnetic head device 2 supported by the magnetic head support frame 23
0 faces into the opening 210 of the cartridge 203 and is held at a predetermined height position relative to the signal recording layer of the recording disk 202. Also, at this time, the optical pickup device 4 is placed on the signal recording surface of the recording disk 202.
is facing the recording disk 202, and for this recording disk 202,
It is possible to write and read information signals.

In this disk recording apparatus, the height position of the magnetic head support frame 23 in the loading state is adjusted using a reference disk. That is, this height adjustment is performed by loading the reference disk and adjusting the height adjustment screw 110 based on the output from the distance sensor provided in the magnetic head device 20.
is rotated so that the output from the distance sensor becomes a predetermined value. This distance sensor includes, for example, a light emitting element such as an LED and a photodetecting element such as a PD, and the photodetecting element detects the intensity of the reflected light from the recording disk 202 of the luminous flux emitted by the light emitting element. It is configured as follows. In this disk recording device, by adjusting the height as described above, the magnetic head support frame 2
The height position of No. 3 can be adjusted with an accuracy of about 2 to 3 μm.

[0106]

As described above, in the disk recording device according to the present invention, a magnetic head support that supports a magnetic head device that applies a magnetic field to a recording disk mounted on a rotary drive device disposed on a chassis is provided. The member is supported so as to be movable in a direction toward and away from the recording disk, and is screwed into the magnetic head support member at one end when the magnetic head device is moved in a direction closer to the recording disk. The height position relative to the recording disk is determined by contact between one end of the height adjustment screw whose side protrudes toward the chassis and a positioning reference portion on the chassis.

[0107] In this disk recording device, the height adjustment screw is configured such that the amount of protrusion of one end of the height adjustment screw from the magnetic head support member can be adjusted. Therefore,
In this disk recording device, the height position of the magnetic head support member relative to the recording disk is adjusted by adjusting the amount of protrusion from the magnetic head support member on one end side of the height adjustment screw. Can be done.

That is, the present invention provides a disk recording device that can easily set the distance between a magnetic head device and a recording disk to a predetermined distance accurately, and can write information signals in a good manner. It is something that can be provided.

[Brief explanation of drawings]

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

FIG. 2 is a reduced exploded perspective view of essential parts of the disc recording device.

FIG. 3 is a perspective view showing the configuration of a cartridge mounting section that constitutes the disc recording device.

FIG. 4 is a perspective view showing the structure of a cartridge holder support frame that constitutes the disc recording device.

FIG. 5 is a perspective view showing the structure of a cartridge holder that constitutes the disc recording device.

FIG. 6 is a perspective view showing the structure of an eject plate constituting the disc recording device.

FIG. 7 is a perspective view showing the state of the magnetic head elevating mechanism constituting the disk recording device at the time of ejection.

FIG. 8 is a perspective view showing the state of the magnetic head elevating mechanism during loading.

9 is an exploded perspective view of the cartridge holder shown in FIG. 5. FIG.

FIG. 10 is a perspective view of the cartridge holder viewed from the back side.

FIG. 11 is a plan view of essential parts of the disc recording device in an ejected state.

FIG. 12 is a right side view of the main parts of the disc recording device in an ejected state.

FIG. 13 is a left side view of the main parts of the disc recording device in an ejected state.

FIG. 14 is a front view of essential parts of the disc recording device in an ejected state.

FIG. 15 is a bottom view showing a state in which the disk cartridge is being inserted into the cartridge holder.

FIG. 16 is a bottom view showing a state in which the disk cartridge is inserted into the cartridge holder and a state in which the cartridge and a shutter release pin are engaged.

FIG. 17 is a longitudinal cross-sectional view viewed from the front side showing a state in which the shutter release pin is engaged with the disk cartridge.

FIG. 18 is a longitudinal cross-sectional view, viewed from the side, showing the state of engagement of the shutter release pin with the disk cartridge.

FIG. 19 is a longitudinal sectional view viewed from the front side showing a state in which the shutter member of the disk cartridge is in the middle of being opened by the shutter release pin.

FIG. 20 is a bottom view showing a state in which the shutter member of the disk cartridge is opened by the shutter release pin.

FIG. 21 is a bottom view showing a state in which the disc cartridge is drawn into the cartridge holder.

FIG. 22 is a plan view showing a state in which loading of the disc recording device is completed.

FIG. 23 is a right side view of the disk recording device in a loading completed state.

FIG. 24 is a left side view of the disk recording device in a loading completed state.

FIG. 25 is a front view of the disk recording device in a loading completed state.

FIG. 26 is a bottom perspective view showing the configuration of the disc cartridge installed in the disc recording device according to the present invention in a state where the shutter member is opened;

FIG. 27 is a perspective view of the bottom side of the disk cartridge showing a state in which the shutter member is closed.

FIG. 28 is an enlarged longitudinal cross-sectional view of a main part showing the structure of a main part of a magnetic head elevating mechanism constituting the disk recording device.

[Explanation of symbols]

Claims (1)

[Claims] 1. A rotary drive device which is disposed on a chassis, has a recording disk mounted thereon, and rotates the recording disk, and is movable in directions approaching and away from the recording disk mounted on the rotary drive device. a magnetic head support member that supports a magnetic head device that applies a magnetic field to the recording disk; a magnetic head support member that is screwed into the magnetic head support member and has one end protruding toward the chassis side; a height adjustment screw whose protrusion amount from the magnetic head support member on one end side can be adjusted;
When the magnetic head support member is moved in a direction in which the magnetic head device approaches a recording disk mounted on the rotary drive device, the magnetic head support member is configured to connect one end of the height adjustment screw and a positioning reference portion on the chassis. A disc recording device in which a height position relative to the recording disc is determined by contact with the disc.