JPH0617203Y2 - Magneto-optical disk loading device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a magneto-optical disk loading device used in a magneto-optical disk device.

2. Description of the Related Art As a concrete means of a conventional magneto-optical recording method, as described in, for example, Japanese Patent Laid-Open No. 52-23318, a magnetic thin film 1b formed on a substrate 1a is provided with a magnetic field applying device 2 and an arrow a. A magnetic field H ₁ in the direction shown is applied to align the magnetization direction of the magnetic thin film 1b in one direction as indicated by an arrow B, and then a light beam 3 is irradiated from an optical device to a part 1c of the magnetic thin film 1b to locally apply it. The information signal is recorded by raising the Curie point or the compensation temperature and reversing the magnetization in the direction indicated by arrow C with the help of the magnetic field due to the spontaneous demagnetization of the surrounding film (see FIG. 6a). .

Therefore, as the magnetic field applying device 2 in the magneto-optical recording, as described in JP-A-59-119507, an access area of the optical head 2 is formed along the access direction of the optical head 4 (arrow A direction). A magnetic circuit 8 including a bar-shaped magnetic pole 5 having a length corresponding to the length of the cover, an exciting coil 6 wound around the magnetic pole 5, and a channel-shaped yoke 7 surrounding the magnetic pole 5 is recorded. It is disclosed that the medium 1 is arranged so as to face the optical head 4 with the medium 1 interposed therebetween (see FIG. 6b).

Further, in Japanese Patent Laid-Open No. 51-97412, the magnetic field applying device 2 is integrally attached to an optical device 9 for irradiating a light beam, and is configured to be movable in the left-right direction by a feeding mechanism 10 of the optical device 9. A magneto-optical recording device is described (see FIG. 6c).

The magnetic field applying device 2 includes a magnetic core 2b having a void 2c.
By passing an electric current through the coil 2a wound on the air gap 2
The magnetic field generated in c is applied to the recording medium 1. Further, in FIG. 6c, 1d is a motor for rotating the recording medium 1 at a constant speed, 9a is a lens mechanism of the optical device 9, and 10a is a lead screw of the feeding mechanism 10.

Further, in Japanese Patent Application Laid-Open No. 57-24047, a small permanent magnet piece 11 as a magnetic field applying device 2 is arranged so as to face the light converging lens 9a of the optical device 9 with the recording medium 1 sandwiched therebetween, and is indicated by an arrow A or B. Move in the direction shown and arrow C
There is described a recording / reproducing apparatus configured so as to be rotatable in the direction (see FIG. 6d).

None of the above-mentioned prior arts describes a mechanism for exchanging a disc held in a disc cartridge, particularly a mechanism for preventing the bias magnetic field applying means from interfering with disc exchanging. Further, there is no description about the clamp means for fixing the disk to the spindle motor so as not to disturb the disk replacement.

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a magneto-optical disk loading mechanism capable of smooth disk exchange with a compact and simple structure.

SUMMARY OF THE INVENTION The present invention provides a magneto-optical disk loading device for reversibly moving a magneto-optical disk cartridge containing a magneto-optical disk for recording and reproducing information, between the cartridge insertion position and the recording and reproducing position. A single plate member including a guide member for holding the disk cartridge, a bias magnetic field generating means for generating a magnetic field applied to the magneto-optical disk, and a clamping means for clamping the magneto-optical disk; A first position parallel to and apart from the guide member, and a moving unit movable between a second position parallel to the guide member and closer to the guide member than the first position, The moving means is in the first position when the magneto-optical disk cartridge is in the cartridge insertion position, and in the magneto-optical disk. The magneto-optical disk loading device is characterized in that the plate member is positioned at the second position when the cartridge moves to the recording / reproducing position.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

1 to 3 are explanatory views of a first embodiment of the loading device 14 according to the present invention. FIG. 1 is a side view showing a state in which the disc cartridge 15 is being loaded. 2 is a side view showing the state after the insertion is completed,
FIG. 3 is a perspective view showing a state during loading.

In the figure, reference numeral 16 indicates a disk cartridge 15
3 is a plate member arranged in parallel with the guide member 17 of FIG. 3, and a clamp member 18 for disc clamping and a bias magnetic field generating yoke portion 19 are fixedly mounted on the plate member 16 as shown in FIG. There is. The clamp portion 18 is composed of a clamp member 20 and a fall prevention holding member 21 as shown in FIG. 4 (a). After the loading is completed, it is placed on the table 22 as shown in FIG. The setting is configured so that the placed disk 23 can be clamped. The bias magnetic field generating yoke portion 19 is composed of a yoke 24 and a winding coil 25, as shown in FIGS. 4 (a) and 4 (b).
The winding coil 25 is fitted on the protrusion 27 a in the center of the yoke 24.

Ear portions 26 and 27 bent downward are formed in the front and rear portions (left and right end portions in FIGS. 1 to 3) of the plate member 16, and the disc cartridge 15 is provided in each ear portion 26 and 27.
The roller pins 28 and 29 are fixed in a direction orthogonal to the insertion direction of the (the direction orthogonal to the paper surface in FIGS. 1 and 2). As shown in FIG. 3, the roller pins 28 and 29 are inserted into the ears 26 and 27, and the roller pins 28a and 29a on the outer side and the roller pins 28b and 29 on the inner side are inserted.
b (28a and 29a are not shown). The plate member 16 includes two parallel vertical holes 30 and 31 formed in a chassis side fixing portion (not shown).
Further, it is guided and supported so as to be vertically movable via outer roller pin portions 28a and 29a. Further, the inner roller pin portions 28b and 29b are engaged with the cam surfaces 32 and 33 formed at two places on the upper surface portions on both sides of the guide member 17, and the guide member 17 is moved forward and backward, that is, the arrow 34. Along with the moving operation in the direction, the cam surfaces 32 and 33 can be moved up and down along the contour line of the cam. As shown in FIG. 2, the hole 30 on one side (yoke portion 19 side) of the two vertical elongated holes 30 and 31 on the chassis side restricts the downward movement position of the plate member 16, and the yoke portion 19 is provided. It is formed in a long hole 30 that also serves as a stopper for positioning. Since the vertical position of the elongated hole 31 on the other side is determined by the disc clamp portion 18, the elongated hole 31 is formed to have a margin larger than that of the elongated hole 30. An ammunition 37 such as a tension coil spring is stretched over the locking portions 35 and 36 provided laterally on the plate member 16 and the guide member 17.

Roller pins 3 are provided on both front and rear sides of the guide member 17.
8 is provided laterally, and the guide member 17 is a roller pin 38.
Hook-shaped hole (inverted L-shaped hole) formed on the chassis side through
It is adapted to be guided and supported by 39, 39. The hook-shaped holes 39, 39 are shaped so that the guide member 17 can be vertically moved by a predetermined amount after the guide member 17 is horizontally moved by a predetermined amount. An ammunition 40, such as a tension coil spring, is obliquely stretched between the locking portion 3b provided laterally on the guide member 17 and the chassis side.
It is biased so that it can move to the right. Reference numeral 41 indicates a stopper portion for stopping the disc cartridge 15, and when the disc cartridge 15 is in contact with the stopper portion 41, the disc cartridge 15 is stopped.
The shutter (not shown) has completed the opening operation.

Reference numeral 42 denotes an eject mechanism for ejecting the disc cartridge 15, which is composed of an eject lever 43 and an eject button 44. On the eject lever 43,
There is a cam surface 45 formed so that the roller pin 38 of the guide member 17 in the lowered state can be moved upward. By pushing the eject button 44 to the left in FIG. 2, the roller pin 38 is moved upward, The guide member 17 accommodating the disk cartridge 15 can be ejected by the action of the bullet 40.

The table 22 for supporting the disk 23 in the disk cartridge 15 is fixed to the spindle motor shaft 46 as shown in FIG. Axial recess 4 of table 22
A center aligning member 48 is jointed in the inside of 7 so as to be movable up and down, and the center aligning member 48 is urged upward through an ammunition 49 such as a compression coil spring. Reference numeral 50 indicates an E ring for preventing the center aligning member 48 from coming off. Incidentally, 51 is an opening of the disk cartridge 15. Further, in the state before the disc ramp, it is desirable to set a sufficient space between the clamp member 20, the bias magnetic field generating yoke portion 19 and the center aligning member 48 so that the disc cartridge 15 can be inserted and ejected. .

The operation of the present invention having the above structure will be described.

When the disc cartridge 15 is inserted into the guide member 17, the shutter of the disc cartridge 15 is opened, and the disc cartridge 15 comes into contact with the stopper portion 41 to stop the insertion.

Further pushing the disk cartridge 15 in the inserting direction,
The guide member 17 starts to move to the left against the bullet 40.
As the guide member 17 moves to the left, the plate member 16 is gradually moved downward vertically along the contour curves of the cam surfaces 32 and 33 and guided by the vertical slots 30 and 31 on the chassis side. To do.

When the disk cartridge 15 is pushed further, the plate member 16
Moves down to the lowest position of the cam surfaces 32, 33, and at this point, the roller pins 38, 38 of the guide member 17 have the hook-shaped holes 3
After reaching the corners of 9, 39, the guide member 17 and the plate member 16 are integrally lowered to the state shown in FIG.

Although the loading of the disc cartridge 15 is completed by the above operation, when ejecting, it is sufficient to push the eject button 44 and push up the guide member 17.

As described above, according to the present embodiment, the disk loading device capable of smoothly converting the disk cartridge 15 in the magneto-optical disk equipped with the disk clamp section 18 and the bias magnetic field generating yoke section 19 is provided with a simple structure. Can be provided.

Further, according to the present embodiment, the plate member 16 on which the disc clamp portion 18 and the bias magnetic field generation yoke portion 19 are fixedly disposed is arranged in parallel with the guide member 17, and is moved downward in that state to move each portion 18, Since the respective functions of 19 are effectively operated, the height of the loading device 14 is extremely reduced, and the device can be made compact.

Further, since the plate member 16 and the guide member 17 can be moved up and down via the contour curves of the doubled cam surfaces 32, 33, and 45, a simple and inexpensive structure and reliable operation can be achieved. Not only will it be possible, but it will also contribute to the promotion of compactness.

As described above, according to the present invention, it is possible to obtain a magneto-optical disk loading device with a simple and inexpensive structure and to make the device significantly compact, and to provide a magneto-optical disk equipped with a bias magnetic field generating means. It is possible to provide a smooth disk exchangeable disk loading mechanism in a disk device. Particularly, in the disc loading apparatus of the present invention, the bias magnetic field generating means and the clamp member are attached to a single plate member, and the plate magnetic member is moved to move the bias magnetic field generator and the clamp member to the magneto-optical disk. It has become possible to make the mechanism for positioning by means of a very simple structure.

[Brief description of drawings]

1 and 2 are side views showing a first embodiment of the device according to the present invention, FIG. 3 is a perspective explanatory view of FIG. 1, and FIGS. 4 (a) and 4 (b).
5 and FIG. 5 are cross-sectional explanatory views of the main part of the present invention, and FIGS. 6 (a), (b), (c) and (d) are explanatory views of the prior art. 15 ... Disc cartridge 16 ... Plate member 17 ... Guide member 18 ... Clamp part 22 ... Table 23 ... Disc 30, 31 ... Oblong hole

Claims (1)

[Scope of utility model registration request] 1. A magneto-optical disk loading device for reversibly moving a magneto-optical disk cartridge containing a magneto-optical disk for recording / reproducing information between a cartridge insertion position and a recording / reproducing position. A single plate member that includes a guide member that holds the magneto-optical disc, a bias magnetic field generating unit that generates a magnetic field applied to the magneto-optical disc, and a clamping unit that clamps the magneto-optical disc. And a moving means for moving between a first position parallel to and away from the guide member and a second position parallel to the guide member and closer to the guide member than the first position. The means is in the first position when the magneto-optical disc cartridge is in the cartridge insertion position, and the magneto-optical disc cart. A magneto-optical disk loading device, wherein the plate member is positioned at a second position when the ridge moves to the recording / reproducing position.