JPH04330657A - Magneto-optical disk driving device - Google Patents

Abstract

PURPOSE:To arrange and position a magnetic head with high precision and smooth operation and setting a magneto-optical disk driving device to be proof against vibration with the simple constitution of less parts. CONSTITUTION:A loading chassis 31 receives the cartridge of a magneto-optical disk so to load it. Then, the cartridge is carried to the recording/reproducing position of the disk. The loading chassis 31 horizontally moves and the magnetic head 61 accordingly descends into the cartridge. Then, it is approximately arranged and positioned to the magneto-optical disk. The magnetic head 6 is supported by a supporting arm 55 which is freely rotatably fitted to the fixed supporting member 51 fixed to a device mainbody. The engaged pins 63 and 65 of the magnetic head 61 are engaged with the support guide hole 43 of the loading chassis 31 and the magnetic head 61 drops with the horizontal shift of the loading chassis 31. A pressure spring 57 presses the magnetic head 61 from a back side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magneto-optical disk drive, and more particularly to a mechanism for approaching and positioning a magnetic head necessary for recording and erasing information.

0002

[Prior Art] A magneto-optical disk drive is a disk exchange type system, in which a magneto-optical disk cartridge (hereinafter simply referred to as a disk cartridge) containing a magneto-optical disk is inserted into the main body of the device each time during recording/playback. Insert into.

The device receives the inserted disk cartridge, transports it to a predetermined position for recording/reproduction, opens shutters on the optical head side and magnetic head side of the cartridge, and chucks the magneto-optical head to a spindle motor. Then, the magneto-optical disk is rotated and information is read out using an optical head. Furthermore, when recording and erasing information, a magnetic field is applied by a magnetic head. After the recording/reproduction is completed, the disk cartridge is again taken out of the apparatus main body.

When recording and erasing information on a magneto-optical disk, it is necessary to bring the magnetic head close to the magneto-optical disk to some extent in order to obtain the necessary magnetic field. However, since the magneto-optical disk is sometimes housed in a disk cartridge, it should be kept in a safe place when loading the disk cartridge, and after loading, it should be inserted inside the external dimensions of the disk cartridge through the opened window (shutter section) of the disk cartridge. It is necessary to bring the magnetic heads close together and position them at appropriate positions.

Conventionally, as a positioning mechanism for the magnetic head of such a magneto-optical disk drive device, one shown in a perspective view in FIG. 7 is commercially available. FIG. 7 shows a state in which a disk cartridge (not shown) is loaded and is in an information recording/reproducing mode.

Two chassis guide grooves 103 and 105 and one bracket guide groove 107 are provided on both sides of the stay 101.

A loading chassis 111 into which a disk cartridge is inserted from the direction of arrow A is engaged with the stay 101 by two rollers 113, 113 provided on both sides. Further, the loading chassis 111 is provided with two slide engagement pieces 115 on each side in order to prevent the coil bracket 121 from twisting when driven. Further, a U-shaped head support piece having a head guide groove 117 into which two head pins (not shown in the figure) protruding from each side of the magnetic head 131 is inserted protrudes upward from the loading chassis 111. ing.

The coil bracket 121 is engaged with the bracket guide groove 107 of the stay 101 by the slider wings 123 on both sides, and also has four guide grooves 125.
As a result, it is engaged with the slider engagement piece 115 of the loading chassis 111. Furthermore, the coil bracket 12
A support plate 127 is provided upright from the support plate 127, and two support guide holes 129 are provided in each support plate 127 on both sides.

Two engaging pins (not shown in the figure) are protruded from both sides of the magnetic head 131 to which the magnetic coil 133 is fixed, and these engaging pins are connected to the support guide hole 12.
9 and the head guide groove 117.

In this device, before the disk cartridge is loaded, the entire device is at a higher position relative to the stay 101 than shown, and the stay 101 is further to the right. When the disk cartridge is inserted into the loading chassis 111 from direction A, the lock is released,
The stay 101 moves forward (in the direction B) and enters the state shown in FIG. 7. Then, the roller 113 is pulled down along the chassis guide groove 105, and the loading chassis 111 is lowered accordingly.

On the other hand, the coil bracket 121 allows the stay 1 to be fixed by the engagement between the guide groove 107 and the slider blade 123.
01 in the direction B, and the loading chassis 1 is engaged by the slider engagement piece 115.
11 and move downwards. As a result, the pins of the magnetic head 131 are guided by the support guide hole 129 and descend along the head guide groove 117, and eventually the magnetic head 131 descends and is positioned close to the magneto-optical head.

However, since this device has a large number of parts and also has too many guide grooves in the vertical and horizontal directions, strict machining and assembly accuracy is required for each part, and movement is not smooth. Furthermore, the workability of assembly is extremely poor. Furthermore, all the members are movable and have no fixed parts, making them prone to malfunction. Furthermore, since the magnetic head 131 is supported from below in the groove, there is also the problem that it is susceptible to vibrations.

[0013]

SUMMARY OF THE INVENTION The present invention provides a positioning mechanism for recording and erasing a magnetic head of a magneto-optical disk drive, which operates reliably, has excellent positioning accuracy, and is stable.

[0014]

[Means for Solving the Problems] The magneto-optical disk drive device of the present invention includes a loading member that receives a magneto-optical disk cartridge, mounts it, moves it, and transports it to a recording/erasing position within the device body; In a magneto-optical disk drive device having a magnetic head that approaches a magneto-optical disk by movement and is located at a predetermined distance from the magnetic disk at a recording/erasing position, a fixed support member fixed to the main body of the device; a magnetic head connecting member that is attached to the magneto-optical disk and supports the magnetic head so as to be able to approach and retract from the magneto-optical disk; and a magnetic head that engages the magnetic head with a loading member and moves the loading member to bring the magnetic head close to the magneto-optical disk. It is characterized by comprising a magnetic head engaging member and a pressurizing member that presses the magnetic head toward the magneto-optical disk.

[0015]

[Operation] When the disk cartridge is inserted into the main body of the apparatus, the loading member receives it, mounts it, and transports it to the position for recording and erasing information on the magneto-optical disk.

The magnetic head supported by the connecting support member fixed to the fixed support member is supported by the engaging member and approaches the magneto-optical disk in conjunction with the movement of the loading member, and is moved in the direction of the magneto-optical disk by the pressurizing member. It is positioned in a state where it is energized, and information is recorded and erased.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded perspective view showing essential parts of an embodiment of a magneto-optical disk drive according to the present invention, and FIG. 2 is a top view of the same embodiment (assembly). Moreover, FIGS. 3 to 5 are side views of main parts showing the loading method of this embodiment.

A main body base (not shown) of the magneto-optical disk drive includes a housing 11 and a front panel 1.
5 is fixed. The front panel 15 has an insertion opening 13a through which the disk cartridge 83 is loaded and unloaded. The insertion port 13a is closed by a door 17 biased by a spring 19.

The loading chassis 31 (loading member) is a member that receives and mounts the disk cartridge 83 carried in from the insertion port 13a, and transports it to the recording/reproducing position of the magneto-optical disk.

Chassis rollers 35 are attached to two pins 33 protruding from each side of the loading chassis 31, and these chassis rollers 35 are attached to two plate guide holes 2 provided in the transport plate 21, respectively.
3 and penetrates therethrough, and is further fitted into the housing guide hole 13 on the outside thereof. Plate guide hole 23
is a diagonal elongated hole that rises toward the back of the apparatus main body, that is, toward the direction in which the disk cartridge 83 is transported during loading.

Two pins 25 are protruded from each of the two transport plates 21, and a plate roller 27 is attached to each of these pins 25. The plate roller 27 is fitted into a housing guide hole 13 provided in the housing 11. The housing guide hole 13 is an elongated hole consisting of a horizontal portion and a vertical portion 13a that bends downward at approximately right angles to the horizontal portion.

Further, the conveyance plate 21 has a rack 29 with teeth carved thereon at its lower end, and this rack 29 and the gear of the loading motor 81 form a rack and pinion. The transport plate 21 is rotated by the loading motor 81.
moves linearly, and along with this, the loading chassis 31 carrying the disk cartridge 83 performs loading or unloading operations.

The loading chassis 31 has an opening 3 so that the magnetic head 61 can directly face the magneto-optical disk.
1a, with support plates 4 on both sides of this opening 31a.
1 is fixed. The support plate 41 supports the magnetic head 6
1 and has a bearing guide hole 43 (guide member) that engages with the support guide hole 43 (guide member). The support guide hole 43 is a generally oblique oblong hole that rises in the direction of movement of the loading chassis 31 during transport.

A fixed support member 51 is firmly fixed to the base (not shown) of the main body of the apparatus. The fixed support member 51 has two connecting arms 55 connected to it by a connecting shaft 53.
One end of the (magnetic head connecting member) is rotatably attached.

The magnetic head 61 to which the magnetic coil 67 is attached has a head support engagement pin 63 and a head engagement pin 65 (both magnetic head engagement members) on both sides.
is installed. These engagement pins 63, 65 are
Both are fitted into a support guide hole 41 and move along this guide hole 41. Further, the other end of the aforementioned connecting arm 55 is rotatably attached to the head support engagement pin 63. Further, a pressing spring 57 (pressing member) made of a wire spring fixed to the fixed support member 51 is connected to the magnetic head 61.
is pressed and urged toward the inside of the opening 31a of the loading chassis 31.

Next, the operation of this magneto-optical disk drive will be explained mainly with reference to FIGS. 3 to 5.

From the insertion opening 15a of the front panel 15,
When the disk cartridge 83 is inserted by pushing up the door 17, the loading chassis 31 receives and mounts it. Simultaneously with this mounting, shutters (not shown) on the optical head side and the magnetic head side of the disk cartridge 83 are opened by an opener (not shown). When the disk cartridge 83 is mounted on the loading chassis 31 as shown in FIG.
(not shown) detects this, the loading motor 81 rotates, the conveyance plate 21 starts moving to the right, and the two plate rollers 27 are fitted into the housing guide holes 13 and move along this. . The two loading rollers 35 of the loading chassis 31 each fit into and pass through the plate guide holes 23 at their upper ends.
Furthermore, since it is fitted into the housing guide hole 13, it is pulled by the conveyance plate 21, and is regulated by the housing guide hole 13 and moves together with the conveyance plate 21 to the position shown in FIG.

Furthermore, as the loading chassis 31 moves to the right, the support guide hole 43 of the support plate 41 fixed thereto also moves to the right.
The head engaging pin 65 and the head supporting engaging pin 63 that have been fitted into the holding guide hole 43 are regulated by the support guide hole 43 and descend therein to reach the position shown in FIG. At this time, as the head support engagement pin 63 descends, the connection arm 55 that supports it
rotates around the connecting shaft 53, and the magnetic head 61 to which the two engaging pins 63 and 65 are attached gradually and smoothly descends. disk cartridge 83
The shutter has already been opened, and the magnetic head 61 descends to enter the inside of the disk cartridge 83, and the descent is stopped at the position shown in FIG. The distance between the magneto-optical disk in the disk cartridge 83 and the magnetic coil 67 of the magnetic head 61 is determined by the support guide holes 43 and 2 in FIG.
head engaging pins 63 and 65.

When the transport plate 21 further moves to the right from the position shown in FIG. 4, the loading chassis 31 is lowered to the position shown in FIG. 5, and the loading operation is completed. Further, the door 17 that was pushed up by the disk cartridge 83 and was in contact with it returns to its original position, and the insertion port 15a is closed, thereby preventing dust from entering into the apparatus from the outside.

Further from the position shown in FIG. 4, the loading motor 8
1 rotates, the conveyance plate 21 with the plate roller 27 fitted into the housing guide hole 13 moves to the right while maintaining this fitted state, and the plate guide hole 23 carved in the conveyance plate 21 also moves to the right. I will do it. As a result, housing guide hole 13 and plate guide hole 2
The chassis roller 35 fitted into both of the housing guide holes 13 and 23 gradually descends along the vertical portion 13a of the housing guide hole 13, and finally reaches the position shown in FIG. reach. Along with this, the loading chassis 31 to which the chassis roller 35 is fixed is lowered, and the disk cartridge 83 is set at the recording/reproducing position. Support plate 41 fixed to loading chassis 31 as loading chassis 31 descends
The magnetic head 61, which engages with the support guide hole 23 by two engaging pins 61 and 63, also descends. At this time, the connecting arm 55 firmly supports the magnetic head 61, and the magnetic head 61 descends reliably and smoothly. Further, the positional relationship between the magnetic head 61 and the magneto-optical disk is also maintained. Furthermore, since the magnetic head 61 is pressed from above by the pressing spring 57 in the position shown in FIG. 5, the magnetic head 61 will not "shake" due to the clearance between the support guide hole 43 and the engagement pins 63, 65 and vibration. There is no.

When the sensor detects that the transport plate 21 has reached the position shown in FIG. 5, the spindle motor chucks the hub of the magneto-optical disk, causing the magneto-optical disk to rotate. A necessary auxiliary magnetic field is applied to the magneto-optical disk by the magnetic coil 67 of the magnetic head 61, and information is recorded by an optical head (not shown) facing the magneto-optical disk.

When the recording of information is completed, the disk cartridge is moved in the opposite direction from FIG. 5 to FIG. 4 to FIG. 3 and is taken out.

In the above embodiment, the magnetic head 61 that was evacuated when the magneto-optical disk drive device was not in operation was
When the disk cartridge 83 is brought close to the recording position and positioned as the disk cartridge 83 is loaded, a support guide hole 43 that moves together with the loading chassis 31 on which the disk cartridge 83 is mounted and transferred, and engagement pins 63 and 65 that engage with the support guide hole 43. This can be done by the connecting arm 55 that supports the magnetic head 61 with respect to the fixed support member 51, and the operation can be performed reliably with a small number of members, and the operation is smooth and the assembly of the device is easy. Moreover, the positioning accuracy with respect to the magneto-optical disk is basically determined by the machining accuracy of the support guide hole 43 and the engaging pins 63, 65, so it is easy to achieve accuracy. Since they are pressed against each other, even if the clearance between the support guide hole 43 and the engagement pins 63, 65 is made large, the positioning accuracy does not deteriorate and smooth operation can be performed.

FIG. 6 is a partial side view showing another embodiment of the present invention, showing only the vicinity of the magnetic head 61. This embodiment is similar to that shown in FIGS. 1 to 5, except that two support guide holes 45, 45 are provided as guide holes for the magnetic head 61. In the embodiment shown in FIGS. 1 to 5, both the head support engagement pin 63 and the head engagement pin 65 are fitted into one support guide hole 43 having an oblique shape as a whole. If the magnetic heads 63 and 65 are at different heights, the magnetic head 61 may be tilted and its tip may come too close to the magneto-optical disk.

Therefore, in the embodiment shown in FIG. 6, the head support engagement pin 63 and the head engagement pin 65 are connected to two
It is fitted into and supported by two support guide holes 45, 45, respectively. Thereby, the lower surface of the magnetic head 61 can be kept parallel to and brought close to the magneto-optical disk housed in the disk cartridge 83.

In the above embodiment, the two engaging pins 63 and 65 are projected from the magnetic head 61 and fitted into the support guide hole 43 or 45, but the transfer plate 21 or the loading chassis 31
Similarly, a roller may be fitted to the engagement pin, and the roller may be fitted into the support guide holes 43 and 45.

[0037]

[Effects of the Invention] In the magneto-optical disk drive device of the present invention,
A magnetic head proximity and positioning mechanism can be realized with a small number of parts and a simple configuration, and the positioning accuracy can be improved with fewer engaging parts.

Furthermore, since the movable member has a supporting portion with respect to the fixed portion, the movement is reliable, the positioning accuracy is improved, and the assemblability is also good. Furthermore, since the magnetic head is pressed by the pressurizing member, it is easy to achieve positioning accuracy and is resistant to vibration.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing main parts of an embodiment of a magneto-optical disk drive device of the present invention.

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a side view of main parts showing a loading method in the apparatus of FIG. 1;

FIG. 4 is a side view of main parts showing a loading method in the apparatus of FIG. 1;

FIG. 5 is a side view of main parts showing a loading method in the apparatus of FIG. 1;

FIG. 6 is a partial side view showing another embodiment of the present invention.

FIG. 7 is a perspective view of a conventional example.

[Explanation of symbols]

11 Housing 13 Housing guide hole 13a Vertical part 15 Front panel 15a Insertion port 17 Door 19 Door spring 21 Conveyance plate 23 Plate guide hole 25 pin 27 Plate roller 29 Rack 31 Loading chassis 31a Opening 33 pin 35 Chassis roller 41 Support plate 43 Support guide hole 45 Support guide hole 51 Fixed support member 53 Connecting shaft 55 Connecting arm 57 Pressure spring 61 Magnetic head 63 Head support engagement pin 65 Head engagement pin 67 Magnetic coil 81 Loading motor 83 Disc cartridge

Claims (3)

[Claims] 1. A loading member for receiving and mounting a magneto-optical disk cartridge, and transporting the magneto-optical disk cartridge to a recording/erasing position within the main body of the apparatus; and a loading member that approaches the magneto-optical disk by moving the loading member; In a magneto-optical disk drive device having a magnetic head located at a predetermined distance from the magnetic disk at a recording/erasing position, there is a fixed support member fixed to the main body of the device, and a magnetic head attached to the fixed support member and attached to the magneto-optical disk. a magnetic head connecting member that supports the magnetic head so that it can approach and retreat; a magnetic head engaging member that engages the magnetic head with a loading member and moves the loading member to bring the magnetic head close to the magneto-optical disk; 1. A magneto-optical disk drive, comprising: a pressure member that presses a magnetic head toward the disk. 2. The magneto-optical disk drive according to claim 1, wherein the pressurizing member is attached to the fixed support member. 3. The loading member has a guide member that engages with the magnetic head engaging member, and as the loading member moves, the magnetic head engaging member moves along the guide member, and the magnetic head moves magneto-optically. 3. The magneto-optical disk drive according to claim 1, wherein the magneto-optical disk drive is located close to the disk.