JPS63171457A - Magneto-optical recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain smooth loading of a medium and to attain a small installing space by designing the titled device in a way that a holding member is moved in a direction ensuring the loading path of an information recording medium. CONSTITUTION:After a holder 107 holding a disk cartridge 102 is moved horizontally along an L-shaped guide hole 122 provided to a side plate 121, the holder starts descending, then a hold member 105 starts descending. When the member comes to the position shown in the figure, a clamp retainer 104 provided to the hold member 105 presses the disk in the disk cartridge 102 against a turntable 109 and clamps said disk. In loading the magneto-optical disk in this way, the holding member 105 is placed away from a direction crossing the loading direction of the medium to attain smooth loading of the medium.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Fields] The present invention is a method for recording and/or recording information on a magneto-optical recording medium, which is an information recording medium, by cooperating a light beam and a magnetic field.
Or, it relates to a magneto-optical recording and reproducing device that is in danger of reproducing and/or erasing.

The magneto-optical recording medium may take various forms such as a disk-like shape and a card-like form, but a disk-shaped magneto-optical recording medium (hereinafter referred to as a magneto-optical disk) will be explained below as an example.

[Prior Art] A magneto-optical disk is a disk in which a magnetic thin film having an axis of easy magnetization perpendicular to the film surface is formed on a substrate, and information is recorded by changing the magnetization direction of this magnetic thin film. During recording, the magnetization direction of the magnetic thin film is first aligned in one direction, and a laser beam digitally modulated in accordance with an information signal is irradiated while applying a bias magnetic field in the opposite direction to the magnetization direction. Then, the temperature of the area irradiated by the radar beam increases, the coercive force decreases, and the area is magnetized in the opposite direction to the surrounding area due to the influence of the bias magnetic field.
A magnetized arm turn is formed according to the information.

Information recorded in this manner can be optically read out using the well-known magneto-optic effect by irradiating the medium with a low-power, unmodulated beam. Furthermore, recorded information can also be erased by applying a magnetic field in the opposite direction to the bias magnetic field during recording.

FIG. 5 is a schematic side sectional view showing a conventional magneto-optical recording and reproducing apparatus using the above magneto-optical disk.

Here, an upper cover 42 is attached to the device frame 41 and is opened and closed when a magneto-optical disk 43 is attached or detached. This magneto-optical disk 43 is clamped to a turntable 44 by a clamper 48 and rotated by a spindle motor within a head frame 45. The optical head 46 moves in the radial direction of the disk along a guide 49 and records information by irradiating the magneto-optical disk 43 with a light beam. Further, a magnet 47 that applies a bias magnetic field is provided integrally with the optical head 46 and moves in the radial direction together with the optical head 46.

In such a configuration, although the magnet 47 can be small, the optical head 46, which is a movable part, becomes large, and there is a problem that high-speed access cannot be supported.

FIG. 6 is a schematic side sectional view showing another example of the configuration of a conventional magneto-optical recording/reproducing device, and the same members as in FIG. 5 are given the same reference numerals and detailed explanations will be omitted.

In this example, the bias magnet 47 is attached to the magneto-optical disk 430.
It has a size that covers the recording area in the radial direction, and is fixed to the upper lid 42 of the device. With the top lid closed, the bias magnet 47 approaches the magneto-optical disk 43 as shown by the broken line.

In this way, this example has a simple structure, and
Moreover, it can also support high-speed access.

[Problems to be Solved by the Invention] However, the conventional magneto-optical recording and reproducing apparatus as shown in FIG. The problem of installing and removing such media is very important when considering systemization with other information devices. It was not possible to use the above-mentioned device, which required an opening/closing space.

[Purpose] The present invention was made in view of the problems of the prior art described above.The purpose of the present invention is to provide a system that can support high-speed access, requires a small installation space, and is suitable for systemization with other information devices. An object of the present invention is to provide a magneto-optical recording and reproducing device.

[Means for Solving the Problems] According to the present invention, the above object is achieved by providing a magneto-optical recording and reproducing apparatus having an insertion path for the recording medium in a direction along the recording surface of the information recording medium. When loading, place the recording medium in the 7! a holding member that holds both the clamping means for holding the information recording medium and the magnetic field generating means that is brought close to the mosquito recording medium, and the holding member is movable in a direction to secure an insertion path for the information recording medium. This is achieved by a magneto-optical recording and reproducing device characterized by the following.

[Effects] The effects obtained by using the above means are as follows.

That is, the present invention has a structure in which the medium is inserted into the apparatus in a direction substantially along the recording surface (so-called front loading).
This is designed to save space.

In order to achieve 70-cent loading, it is necessary to secure a path for inserting the medium into the device, which increases the size of the device, and the means for generating the bias magnetic field and the means for clamping the medium, which are brought close to the medium, become a major obstacle. However, in the present invention, smooth insertion of the medium is made possible by providing a mechanism that moves the holding member that holds the bias magnetic field generating means and the clamping means away from each other in a direction perpendicular to the insertion direction of the medium during insertion. This allows for effective use of space.

[Embodiments] Hereinafter, embodiments according to the present invention will be described in detail based on the drawings.

1(a) and 1(b) are side sectional views showing a first embodiment of the magneto-optical information recording/reproducing apparatus of the present invention.
) is the illustration when the disk cartridge is inserted, 1st
Figure (b) is a diagram when the magneto-optical disk is clamped on the spindle Tanabata.

In the figure, 102 is a disk cartridge that houses a magneto-optical disk inside. Disc cartridge 1
The holder 107 holding the disk cartridge 107 moves along the L-shaped guide hole 122 provided in the side plate 121, and moves the disk cartridge 102 from the position shown in FIG. 1(a) to the position shown in FIG. 1(b).
).

Reference numeral 106 denotes a magneto-optical head 64), which is driven in the radial direction of the disk by a drive mechanism (not shown) provided on the head frame 108. A turntable 109 is rotated by a spindle motor provided on the head frame 108.

Also, in the figure, 103 is a bias magnet, 104
is the clamp foot. The bias magnet 103 and the clamp foot 104 are held by a holding member 105, and the holding member 105 is provided in the side plate 121 and is movable in the vertical direction along a guide hole 123 in the form of a traveling line. .

In this configuration, when the holder 107 moves horizontally and then starts descending, the holding member 105 starts descending and comes down to the position shown in FIG. 1(b), and the clamp provided on the holding member 105 A presser foot 104 presses and clamps the disc in the disc cartridge 102 against the turntable 109.

The above is the description of the first embodiment of the present invention.

As is well known, magneto-optical disks are rewritable and capable of high-density recording, so they are expected to replace magnetic disks. The full-hide size of the 5174-inch disk device is the mainstream (
Magneto-optical disk devices must be downsized to a height of 82 cm, a width of 146 cm, and a depth of 20.3 to 206 cm.

Figures 1 (a) and (b) show the main components of a magneto-optical disk drive, but there are 69 other parts that require space, such as printed circuit boards, that cannot be accommodated in the full-hide size mentioned above. In addition to downsizing each unit and component, it is also necessary to eliminate wasted space as much as possible.

In FIG. 1(a), the position of the holding member 105 is set so that the lower end of the clamp presser 104 is located at least above the insertion path of the disk cartridge 102 to be inserted. Therefore, more space than necessary is required between the bias magnet 103 and the holding member 105, and the holder 107;
This is a space that cannot be used because the holding member 105 moves up and down.

Next, a second embodiment of the present invention will be described in which such wasted space is minimized. Incidentally, in the members shown in FIG. 1 and FIG. 2, those having the same functions are given the same reference numerals.

2(a) and 2(b) are side sectional views showing a second embodiment of the magneto-optical information recording/reproducing apparatus of the present invention.
) is the illustration when the disk cartridge is inserted, the second
Figure (b) is a diagram when the magneto-optical disk is clamped by the spindle motor.

The difference between FIG. 2 and FIG. 1 is the positional relationship between the flang holder 104 and the holding member 105 in the direction perpendicular to the disk surface in each of FIGS.

This K will be explained in more detail below.

In the embodiment shown in FIG. 1, the movement stroke Sl of the holding member 105 and the bias magnet 103 is determined by the following equation.

S, =a −td+b −(1
), where a is the turntable 1 in FIG. 1(a).
09 and the disc pressing surface of the clamp presser 104. b is the holding member 105 in FIG. 1(b)
and the upper disk 104m of the clamp foot 104. td is the thickness of the disk.

Further, in the embodiment shown in FIG. 2, the movement stroke S of the holding member 105 and the bias magnet 103 is determined by the following equation.

S, = a −td −a −
(2) Here, C is the holding member 10 in FIG. 2(b)
5 and the lower disk 104b of the clamp foot 104.

On the other hand, the movement stroke Sc of the clamp presser is 5=a-
Since it is given by td(3), from (1), (2), and (3), s*<s, <sl - (4)
This relationship is established. That is, in the configuration shown in FIG. 1, the stroke of the holding member 1050 needs to be longer than the stroke of the flange presser 104, but in the configuration shown in FIG. 2, the stroke of the holding member 105 can be made shorter than the stroke of the clamp presser 1040. . That is, s, -8s = b + c - (5)
2, the holding member 105 is attached to the clamp presser 1
04 further downward, the movement strokes of the holding member 105 and the bias magnet 103 are shortened by the distance of the stroke difference b + e, and unnecessary sweeps can be eliminated accordingly.

Hereinafter, the means by which the holding member 105 moves the clamp presser 104 downward will be explained in more detail with reference to FIGS. 3 and 4.

FIGS. 3(a) and 3(b) are cross-sectional views of the second embodiment row of the present invention viewed from the disk cartridge insertion direction, and FIG. 3(a) shows the disk cartridge 102 inserted into the device. Fig. 3(b) is a drawing when the disk is clamped to the spindle motor. Fig. 4(a) and (b) are the drawings when the disk is clamped to the spindle motor. FIG. 6 is a perspective view of the appearance of each device in case b).

In FIG. 3(1k) and FIG. 4(a), the disc cartridge 102 is supported by a holder 107 and is carried onto the turntable by a loading mechanism (not shown). At this time, the clamp presser 104 and the holding member 10
5 is retracted upward to avoid hitting the holder 107.

Also, at this time, the clamp presser 104 is attached to a pair of lenses 11
1 is pushing it upward. That is, the lever 11
1 is supported in a swingable state around a lever shaft 113t fixed to a lever 112 provided on the holding member 105. The torsion spring 114 causes the lever 111 to always push up the clamp presser 104 upward in the state shown in FIG. 3(a).
The lower disc 104b is brought into contact with the lower end of the holding member 105.

After this, the holder 107 descends, and the holding member 105 also descends to follow this. By lowering the holder 107, the disk is placed on the turntable 109. After that, as the holding member 105 further descends, one end of the lever 111 comes into contact with the holder 107, the lever 111 swings around the lever shaft 113, and the other end of the lever 111 presses the clamp holder downward, and the clamp holder 104 is a holding member 105
decreases relative to

In the state shown in FIG. 3(b), since a permanent magnet (not shown) is provided inside the clamp holder 104, the permanent magnet is attracted to the iron piece provided at the tip of the spindle motor shaft (not shown). , the disc is pressed against the turntable 109 and clamped. At this time, since the lever 111 and the holding member 105 do not come into contact with the clamp presser 104, the disc and the flang presser 104 can rotate at high speed.

When the clamp is released, the clamp holder 1 fixed to the holding member 105 is lifted by the holding member 105.
15 lifts up the upper disk 104a of the clamp holder 104 to release the clamp. At this time, there is a slight protrusion (not shown) on one part of the clamp holder 115.
Since this part is provided with a clamp presser 10,
4, so as to reduce the clamp release force.

In this way, in the second embodiment, although the magnetic field generating means and the clamping means are moved by the same holding member, only the clamp/means can be further moved, so that the movement stroke of the holding member can be shortened. This allows the device to be made very thin.

The present invention may be modified in addition to the embodiments described above, and the present invention includes such modifications as long as they do not depart from the scope of the claims. .

[Effects of the Invention] As described above in detail and specifically, the present invention can withstand high-speed access, and also allows the device main body to be made thinner.
It is possible to provide a magneto-optical recording and reproducing device that requires a small installation space and is suitable for systemization with other information devices.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are side sectional views showing a first embodiment of the magneto-optical recording/reproducing apparatus of the present invention. FIGS. 2(a) and 2(b) are side sectional views showing a second embodiment of the present invention. FIGS. 3(&) and 3(b) are cross-sectional views of the second embodiment of the present invention when viewed from the disk cartridge insertion direction. FIGS. 4(1) and 4(b) are external perspective views of a second embodiment of the present invention. 5 and 6 are side sectional views showing a conventional magneto-optical recording/reproducing device. 102=Disk cartridge 103: Bias magnet 104: Clamp presser 105: Holding member 106:
Optical head 109: Turntable

Claims (2)

[Claims] (1) In a magneto-optical recording/reproducing device having an insertion path for the recording medium in the direction along the recording surface of the information recording medium, a clamping means for clamping the recording medium when loading the recording medium and a clamping means for clamping the recording medium, A magneto-optical recording and reproducing device comprising a holding member that holds both the magnetic field generating means and the magnetic field generating means to be brought close to each other, and the holding member is movable in a direction to secure an insertion path for the information recording medium. Device. (2) The magneto-optical recording and reproducing apparatus according to claim (1), wherein the moving distance of the magnetic field generating means is shorter than the moving distance of the clamping means.