JPH07320329A - Recording head lifting device for magneto-optical disk device - Google Patents

Abstract

(57) [Summary] [Object] To provide a recording head raising / lowering device for a magneto-optical disk device, which has a simple structure to reduce the cost and to be easily downsized. [Structure] Recording head insertion hole 1 on the surface of this container 14
A head assembly 16 capable of contacting the disk surface of the magneto-optical disk from 4a and having a recording head 15.
A rotary cam 20 that elastically presses this head assembly in a direction away from the magneto-optical disk; a slide member 19 that can slide on the container by inserting the magneto-optical disk into the container; The tip approaches the magneto-optical disk from the head assembly.
A cam portion 19d formed on a slide member which swings so as to separate from each other, and a rotary cam formed so that the recording / reproducing magneto-optical disk can be fitted into the recording head insertion hole of the container when it is completely inserted into the container. And a recording head elevating device having a supported portion 20d.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevation device for a recording head for recording on a recording / reproducing disc in a magneto-optical disc device for recording / reproducing a magneto-optical disc such as an MD.

[0002]

2. Description of the Related Art Conventionally, a magneto-optical disk device equipped with a recording head lifting device is, for example, as shown in FIGS.
It is configured. In FIG. 8 and FIG. 9, a magneto-optical disk device 1 has a spindle 3 protruding from an upper surface of a chassis 2 and rotationally driven by a spindle motor 3a.
And an optical pickup 4 provided below the chassis 2 and a flat container 5 provided above the chassis 2.

This container 5 is open at one end, that is, at the left end in the figure, and the magneto-optical disk loaded in the cartridge is inserted into the inside from this opening. The other end of the container 5, that is, the right end in the figure, is swingably supported by a pivot 5a fixed to the chassis 2. As a result, the container 5 is swung as shown by the arrow from the position where the left end is slightly lifted as shown to the position where it is placed on the upper surface of the chassis 2.

Further, the container 5 is provided with a recording head insertion hole 5b extending in the radial direction of the magneto-optical disk on the upper surface of the container 5 on the front side of the center.

On the upper surface of the container 5, there is provided a head assembly 7 for elastically supporting the recording head 6 so that it can come into contact with the disk surface of the magneto-optical disk 9 through the recording head insertion hole 5b, and below the head assembly 7. And a head-up mechanism 8 located on the side of the magneto-optical disk.

The head assembly 7 is a container 5
On the other side, the head arm 7b is rotatably supported around the pivot 7a, and the support member 7c made of an elastic material is attached to the tip of the head arm 7b. Here, the head arm 7b is the above-mentioned pivot 7
It can slide along a. Further, the head arm 7b is biased in the direction of arrow A by a spring 7d.

The head arm 7b of the head assembly 7 is connected to the optical pickup 4 via a connecting member 7e, as shown in FIG. As a result, when the optical pickup 4 moves along the linear guide 4a in the radial direction of the magneto-optical disk, the head assembly 7 also moves integrally in the radial direction of the magneto-optical disk. Thus, the optical pickup 4 and the recording head 6
Tracking is performed on the magneto-optical disk.

The head-up mechanism 8 includes a head-up cam plate 8a which is swingably supported on the lower side of the head assembly 7, that is, the magneto-optical disk side, and the head-up cam plate 8a on the magneto-optical disk side. A head-up cam 8b which is in contact with the head-up cam 8b and a head-up motor 8d which is mounted on the container 5 and rotationally drives the head-up cam 8b via a gear device 8c. As a result, when the head-up motor 8d is rotated, the head-up cam 8b is rotationally driven, and the head-up cam plate 8a is swung according to the shape of the cam surface of the head-up cam 8b.

On the other hand, the head arm 7b is
Due to the tension of the spring 7d, the head-up cam plate 8a is always in contact with the head-up cam plate 8a, and the head-up cam plate 8a is in contact with the cam surface of the head-up cam 8b. Therefore, the recording head 6 supported by the head assembly 7 is inserted into the container 5 from the position retracted to the outside of the container 5 as the head arm 7b swings by the rotation of the head-up motor 8d. It can be moved to a position where it comes into contact with the surface of the magneto-optical disk.

According to the magneto-optical disk device 1 thus constructed, the magneto-optical disk 9 is first inserted into the container 5 when recording or reproducing the magneto-optical disk 9. As a result, the magneto-optical disc 9 is moved by a mechanism (not shown) provided in the container.
The shutter lock of the cartridge is released and the shutter is opened. From this state, when the container 5 is swung and placed on the upper surface of the chassis 2, the spindle 3 protruding on the upper surface of the chassis 2 engages with the central hub of the magneto-optical disk.

When the loading of the magneto-optical disk 9 is detected by a sensor (not shown) or the like, the spindle 3 starts to rotate, and the rotation drives the magneto-optical disk 9 to rotate at a predetermined rotational speed, and also the chassis. 2 along the linear guide 4a provided on the lower surface of the optical pickup 4
Are moved in the radial direction of the magneto-optical disk 9 to be tracked at a predetermined track position.

On the other hand, the head assembly 7
When not in use or when reproducing the magneto-optical disk 9, the head-up motor 8d rotates to swing the head-up cam plate 8a, so that the tip of the head arm 7b moves from the surface of the magneto-optical disk 9. Has been separated. As a result, the recording head 6 supported by the head assembly 7 remains held at a position separated from the disk surface of the magneto-optical disk 9. Thus, with respect to a desired track position on the disk surface of the magneto-optical disk 9, the light beam from the optical pickup 4 is irradiated, the return light is detected by the optical pickup 4, and the information recorded on the magneto-optical disk 9 is detected. Regeneration can take place.

Further, in the head assembly 7, at the time of recording on the magneto-optical disk 9, the head-up cam plate 8a is swung by the rotation of the head-up motor 8d so that the tip of the head arm 7b is magneto-optical. The surface of the disk 9 is approached. As a result, the recording head 6 supported by the head assembly 7 comes into contact with the disk surface of the magneto-optical disk 9.

In this case, the contact pressure of the recording head 6 is
The tension of the spring 7d of the head assembly 7 and the support member 7
It is given by the elastic force of c. Therefore, a predetermined modulation magnetic field is applied by the recording head 6 to a desired track position on the magneto-optical disk 9, and the light beam from the optical pickup 4 is intermittently applied to the disk surface of the magneto-optical disk 9. Is irradiated. Thus, the desired track of the magneto-optical disk 9 can be recorded by thermomagnetic recording.
The desired information is recorded.

When the magneto-optical disk 9 is ejected, the head-up motor 8d is rotationally driven, and the head-up cam plate 8a swings in the direction away from the magneto-optical disk 9. As a result, the head assembly 7 is separated from the magneto-optical disk 9, and the recording head 6 is retracted outside the container 5.

Thus, the magneto-optical disk 9 is ejected without hitting the head assembly 7 or the recording head 6. At this time, in the magneto-optical disc 9, the ejection lever 5c provided in the container 5 pushes the cartridge of the magneto-optical disc 9 in the ejection direction by a predetermined distance based on the tension of the ejection spring 5d. Is discharged. Thus, the user can easily take out the cartridge of the magneto-optical disk 9 that has been slightly ejected from the opening of the container 5 and take it out.

There are some cartridges of the magneto-optical disk 9 for recording / reproducing and reproducing only. The cartridges are marked with recording / reproducing or reproducing only, respectively. A not-shown discriminating means for mechanically or electrically detecting this mark is provided. Only when the discriminating means detects that the magneto-optical disc 9 inserted in the container 5 is for recording / reproducing, the head-up motor 8d is rotated to move the recording head 9 to the disc surface of the magneto-optical disc. I am trying to make contact with.

[0018]

However, in the magneto-optical disk device 1 having such a structure, it is necessary to determine whether the magneto-optical disk 9 inserted in the container 5 is for recording / reproducing or for reproducing. Based on the mechanical or electrical discriminating means of, and the output signal from this discriminating means,
Only in the case of the recording / reproducing magneto-optical disk, the head-up mechanism 8 for bringing the recording head 6 into contact with the disk surface of the magneto-optical disk 9 is required.

Therefore, there is a problem that the structure becomes complicated, the number of parts is large, and the parts cost and the assembling cost are high. Further, since a space for accommodating the discriminating means and the driving means is required, there is a problem that the entire magneto-optical disk device becomes large.

When the recording / reproducing magneto-optical disk is used, after the magneto-optical disk 9 is inserted into the container 5, the type of the magneto-optical disk is discriminated by the discriminating means and the recording head is moved by the head-up mechanism. There has been a problem that the time to contact the surface of the magneto-optical disk becomes relatively long.

Furthermore, when the magneto-optical disk is ejected, the magneto-optical disk is ejected after the recording head is retracted to the outside of the container (head-up) by the head-up mechanism, and therefore the time required for completion of ejection is long. In order to prevent the user from forcibly swinging the container 5 on the chassis, the mechanism for locking the container 5 in the mounted state on the chassis 2 until the head-up completion is confirmed. Will also be needed. Therefore, there is a problem that the cost becomes higher.

In view of the above points, it is an object of the present invention to provide a recording head raising / lowering device for a magneto-optical disk device, which has a simple structure to reduce the cost and to be easily miniaturized. I am trying.

[0023]

According to the present invention, the above object is to provide a magneto-optical disk device having a container into which a magneto-optical disk is inserted from one side, and a recording head insertion hole provided on the surface of the container. A head assembly having a recording head and capable of contacting the disk surface of the magneto-optical disk through the rotation, and rotation for elastically pressing the head assembly in a direction away from the magneto-optical disk, the head assembly swingably supported by the container. A cam, a slide member that can slide with respect to the container by inserting the magneto-optical disk into the container, and usually the rotary cam swings the rotary cam in a direction that pushes the head assembly away from the magneto-optical disk. When the slide member is slid in the insertion direction by inserting the magneto-optical disk, Includes a cam portion which the rotating cam is formed on the slide member so as to swing in the direction away toward the head assembly in a magneto-optical disk,
A recording head lifting device for a magneto-optical disk device, comprising: a support portion formed on the rotary cam so that the recording / reproducing magneto-optical disk can be inserted into the recording head insertion hole in a state where the recording / reproducing magneto-optical disk is completely inserted. Is achieved by

In the recording head lifting device according to the present invention, preferably, the slide member is biased by a spring toward the magneto-optical disk insertion side.

In the recording head elevating / lowering device according to the present invention, preferably, the cam portion of the slide member is slanted so as to be separated from the disc surface of the magneto-optical disc in the magneto-optical disc insertion direction from the magneto-optical disc insertion side. And a part substantially parallel to the disk surface.

In the recording head raising / lowering device according to the present invention, preferably, the rotary cam has an intermediate portion extending in the inserting direction of the magneto-optical disk on both sides of a moving range of the recording head in the radial direction of the magneto-optical disk, and an intermediate portion thereof. A head-up portion which extends in the moving direction of the recording head so as to connect the tips of the portions and can contact the head arm is provided, and the head-up portion biases the head assembly away from the magneto-optical disk. It is configured to be.

In the recording head raising / lowering device according to the present invention, preferably, the head assembly is swingably supported at the other end of the container, and the head assembly is directed to the side opposite to the magneto-optical disk. And a spring for urging it.

[0028]

According to the above construction, when the magneto-optical disk is inserted from one side of the container, the outer shape of the magneto-optical disk causes the slide cam plate to move in the inserting direction of the magneto-optical disk. As a result, the cam portion of the slide cam plate is disengaged from the cam surface of the rotary cam.

After that, when the magneto-optical disk is completely inserted into the container, the shutter lock of the magneto-optical disk is released and the shutter is opened. At that time, if the magneto-optical disk is a recording / reproducing magneto-optical disk,
The support portion of the rotating cam is fitted in the recording head insertion slot of the magneto-optical disk. As a result, the head assembly is released from the tip portion of the rotary cam, so that the recording head attached to this head assembly is moved to the recording position where it comes into contact with the disk surface through the recording head insertion slot. become.

On the other hand, when the magneto-optical disk is a read-only magneto-optical disk, the magneto-optical disk does not have a recording head insertion slot.
The support of this rotating cam remains pushed out of the container by the contour of this magneto-optical disk. Therefore, the head assembly is separated from the magneto-optical disk by the tip portion of the rotary cam. Thus, the recording head attached to the tip of the head assembly is held at the retracted position outside the passage of the magneto-optical disk.

In this way, the recording head is moved only when the support portion of the rotary cam is fitted in the recording head insertion slot of the magneto-optical disk, that is, when the magneto-optical disk is the recording / reproducing magneto-optical disk. , And is moved to the recording position based on the elasticity of the head assembly.

When the slide member is urged by the spring toward the magneto-optical disk insertion side, the slide member always moves the magneto-optical disk according to the inserting operation of the magneto-optical disk when the magneto-optical disk is inserted. It will slide while contacting the tip of the disk cartridge.

The cam portion of the slide member extends obliquely from the magneto-optical disc insertion side so as to be separated from the disc surface of the magneto-optical disc in the magneto-optical disc insertion direction, and subsequently is substantially parallel to the disc surface. When the slide member returns following the ejection of the magneto-optical disk when the magneto-optical disk is ejected, its cam part smoothly engages with the cam surface of the rotating cam. You can do it.

The recording head is moved so that the rotary cam connects the intermediate portion extending in the inserting direction of the magneto-optical disc and the tip of the intermediate portion on both sides of the radial movement range of the recording head of the recording head. A head-up portion that extends in the direction and can contact the head arm. When the head-up portion is urged so as to separate the head assembly from the magneto-optical disk, the recording head is magneto-optical. At any position in the radial direction of the disk, the recording head at the tip of the head assembly is reliably moved toward or away from the disk surface by the swing of the head-up portion of the rotary cam.

If the head assembly is swingably supported at the other end of the container and is provided with a spring for urging the head assembly toward the magneto-optical disk, the head assembly is The recording head attached to the tip of the assembly is brought into light contact with the disk surface of the magneto-optical disk by the spring.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to FIGS. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

FIGS. 1 and 2 show an embodiment of a magneto-optical disk device equipped with a recording head lifting device according to the present invention. In these figures, the magneto-optical disk device 10
Is a spindle 12 protruding from the upper surface of the chassis 11 and driven to rotate by a spindle motor 12a.
And an optical pickup 13 provided below the chassis 11 and a flat container 14 provided above the chassis 11.

One end of the container 14, that is, the left end in the figure, is opened, and the magneto-optical disk loaded in the cartridge is inserted into the inside from this opening. The other end of the container 14, that is, the right end in the figure, is swingably supported by a pivot 14a fixed to the chassis 11. As a result, this container 14
The left end is swung from a slightly lifted position to a position where it is placed on the upper surface of the chassis 11.

Further, the container 14 is provided with a recording head insertion hole 14b extending in the radial direction of the magneto-optical disk on the upper surface thereof in the front side of the center.

On the upper surface of the container 14, a head assembly 16 that elastically supports the recording head 15 so that it can contact the disk surface of the magneto-optical disk through the recording head insertion hole 14b, and this head assembly 16 are provided.
And a head-up mechanism 17 located on the lower side, that is, on the magneto-optical disk side.

The head assembly 16 includes a head arm 16b rotatably supported on the other side of the container 14 about a pivot 16a, and the head arm 16b.
Support member 16 made of elastic material attached to the tip of b
and c. Here, this head arm 1
6b is slidable along the pivot 16d, and the movement of the head arm 16b along the pivot 16a is restricted by an angle 16e formed so as to clamp both ends of the pivot 16a. ing. Further, the head arm 16b is provided with a compression coil spring 16d fitted and inserted in the pivot 16a, so that the pivot 16a
The coil spring 16d is urged in the direction of the arrow X along with, and is urged in the direction of the arrow A around the pivot 16a by one end of the coil spring 16d.

The head arm 16b is connected to the optical pickup 13 via the angle 16e, as shown by the chain line in FIG. Accordingly, when the optical pickup 13 moves in the radial direction of the magneto-optical disk along a linear guide (not shown), the head assembly 16 also moves integrally in the radial direction of the magneto-optical disk. Thus, the tracking of the optical pickup 13 and the recording head 15 with respect to the magneto-optical disk is performed.

The above-mentioned structure is similar to the magneto-optical disk device 1 having the conventional head lifting device shown in FIGS. 8 and 9, but the magneto-optical disk device 1 according to the present embodiment.
0 is different in the following points.

In the magneto-optical disk device 10 according to the present embodiment, the head-up mechanism 17 includes the container 14
The slide base plate 18 is provided on the upper surface of the slide base plate 18, and the slide cam plate 19 and the rotary cam 20 attached to the slide base plate 18.

In the illustrated case, the slide base plate 18 is screwed to the upper surface of the container 14 by a screw 18a. The slide base plate 18 may be fixed to the upper surface of the container 14 by other fixing means such as adhesion or welding.

The slide cam plate 19 has two elongated holes 19a extending in the inserting direction of the magneto-optical disk at the upper edge in FIG.
And at least one protruding portion 19b protruding laterally from the lower edge. The slide shafts 18a planted on the upper surface of the slide base plate 18 are engaged with the elongated holes 19a, respectively. As a result, a slide guide for the slide cam plate 19 is constructed. The projecting portion 19b is engaged with an engaging hole 18c of the rising portion 18b formed at the lower edge of the slide base plate 18 extending in the inserting direction of the magneto-optical disk. As a result, the slide cam plate 19 is prevented from rising at the lower edge of FIG.

Thus, the slide cam plate 19 is supported by the slide base plate 18 so as to be movable in the inserting direction of the magneto-optical disk. It is obvious that the slide cam plate 19 may be supported by other appropriate means as long as it can move in the inserting direction of the magneto-optical disk.

Further, the slide cam plate 19 has a bent portion 19c formed so that the tip of the slide cam plate in the inserting direction of the magneto-optical disc projects into the passage of the magneto-optical disc of the container 14. Accordingly, when the magneto-optical disk is inserted into the container 14, the cartridge tip of the magneto-optical disk pushes the bent portion 19c, so that the slide cam plate 19 moves relative to the slide base plate 18. It slides in the inserting direction of the magneto-optical disk.

The slide cam plate 19 has a cam portion 19d extending upward at one side edge (upper side edge in FIG. 1). The cam portion 19d is a portion 19d that extends obliquely upward from the magneto-optical disc insertion side.
-1 and a substantially horizontal portion 19d-2 are formed.

The rotary cam 20 swings when the shaft portion 20a protruding laterally from one end thereof engages with a bearing hole provided in a rising portion 18d extending upward from both side edges of the slide base plate 18. It is movably supported. Further, the rotary cam 20 is provided with a head-up spring 21 integrally attached so as to extend in the inserting direction of the magneto-optical disk (rightward in the drawing). The head-up spring 21 is formed in a frame shape as a whole, as shown in FIG. As a result, the recording head insertion hole 1 of the container 14
The recording head 15 can be brought into contact with the disk surface of the magneto-optical disk via 4a. Further, the head-up spring 21 comes into contact with the horizontal portion of the locking piece 18e that rises upward from the vicinity of both sides of the slide base plate 18, whereby the upward movement is restricted.

The slide cam plate 19 and the rotary cam 20 have a slide spring 22 stretched between an engaging portion 19e of the slide cam plate 19 and an engaging portion 20c of the rotary cam 20.
Are biased toward each other by. As a result, the slide cam plate 19 is biased toward the magneto-optical disc insertion side (left side in the drawing), and
The rotary cam 20 is given the right-handed rotation in FIG.

Further, the rotary cam 20 has a cam surface 20b facing downward at one side edge (upper side edge in FIG. 1) near the tip in the magneto-optical disk insertion direction. ing. Thus, the cam surface 20b can be brought into contact with the cam portion 19d of the slide cam plate 19 by the slide spring 22.

As a result, when the slide cam plate 19 is located on the magneto-optical disk insertion side (see FIGS. 1 and 2), the cam surface 20b of the rotary cam 20 has the slide cam plate 1
It comes into contact with the cam portion 19d of No. 9. Therefore, the rotating cam 20
Has its tip lifted upward and the head-up spring 21
The tip of the head arm 16 of the head assembly 16
b will be pushed upwards. Thus, the recording head 15 supported by the head assembly 16 is retracted outside the container 14.

Further, as shown in FIG. 3, the rotating cam 20 has a cam surface b abutting against the cam portion 19d of the slide cam plate 19 and is inserted into the container 14. The support portion 20d is provided at a position where it can contact the upper surface of the disk cartridge.

Further, inside the container 14, a discharge lever 23 made of an elastic material is provided. This allows
At the time of ejection, the magneto-optical disk inserted in the container 14 is ejected from the inside of the container 14 by pushing the tip of the cartridge based on the tension of the ejection lever 23.

The magneto-optical disk device 10 provided with the recording head raising / lowering device according to this embodiment is configured as described above, and its operation is performed as follows.

When the recording / reproducing magneto-optical disk is used as the magneto-optical disk, the magneto-optical disk 24 is first inserted from the opening on one side of the container 14 as shown in FIG. Then, as shown in FIG.
The tip of 4 contacts the bent portion 19c of the slide cam plate 19 while deforming the discharge lever 23 by pressing it rightward in the container 14. Further, when the magneto-optical disc 24 is inserted, the slide cam plate 19 is moved to the slide base plate 18 as shown by the arrow in FIG.
The optical disk 24 slides in the inserting direction. As a result, the cam surface 20b of the rotary cam 20 is disengaged from the cam portion 19d of the slide cam plate 19.

The magneto-optical disk 24 is attached to the container 1
When it is completely inserted into the disk 4, the magneto-optical disk 24 is unlocked by the mechanism (not shown) provided in the container 14, the shutter is opened, and the support portion 20d of the rotary cam 20 is released. The magneto-optical disk 24 is inserted into the recording head insertion slot 24a.

As a result, the rotary cam 20 is rotated clockwise in FIG. 4, so that the head-up spring 21 has its tip moved toward the disk surface of the magneto-optical disk 24, and is moved from the head arm 16b of the head assembly 16. Will be separated. Therefore, since the head arm 16b is released from the head-up spring 21, this head arm 16b
Swings in the direction of arrow A in FIG. 2 based on the tension of the spring 16d. At this time, the support member 16c attached to the head arm 16b is restored to its original state due to its elasticity.

Thus, the recording head 15 attached to the tip of the support member 16c is moved from the above-mentioned retracted position to the recording head insertion hole 24a of the magneto-optical disk 24 via the recording head insertion slot 14b of the container 14. The recording medium is moved to a recording position which comes into contact with a predetermined track position on the surface of the disk 25 accommodated in the magneto-optical disk 24 via.

From this state, the container 14 is swung and placed on the upper surface of the chassis 11. This allows chassis 1
The spindle 12 protruding from the upper surface of the disk 1 is engaged with the central hub of the disk 25 of the magneto-optical disk 24, whereby the disk 12 is rotationally driven at a predetermined rotational speed by the rotation of the spindle 12. Then, with respect to a desired track position on the disk 25, the recording head 15
A predetermined modulation magnetic field is applied, and the laser beam from the optical pickup 13 provided below the chassis 11 is intermittently applied to the disk 25 of the magneto-optical disk 24. Thus, by thermomagnetic recording, the disk 25
The desired information is recorded on the desired track.

In the case of reproduction, the recording head 15 does not apply a modulation magnetic field, and the optical pickup 13 detects the return light of the laser beam from the optical pickup 13 from the disc 25. The information of the desired track will be reproduced.

When the magneto-optical disc is ejected, the tip of the cartridge is pushed by the eject lever 23 when the eject lever 23 is operated. As a result, the magneto-optical disk 24 is ejected from the inside of the container 14 to a state in which it slightly protrudes.
At this time, the bent portion 19c of the slide cam plate 19 follows the movement of the magneto-optical disk 24 based on the tension of the slide spring 22. As a result, the slide cam plate 19 slides on the slide base plate 18 toward the magneto-optical disc insertion side.

As a result, this slide base plate 19
Is the rotary cam 20 because the slope 19d-1 of the cam portion 19d is
This will push up the cam surface 20b. Therefore, the slide base plate 19 causes the rotary cam 20 to rotate counterclockwise in FIG. 2, and the head-up spring 21 causes the head arm 16b and the support member 16c of the head assembly 16 to rotate again due to the counterclockwise rotation of the rotary cam 20. Push upwards. Thus, the recording head 15 is the container 1
4 and is returned to the state before the insertion of the magneto-optical disk 24 shown in FIG.

On the other hand, when a read-only magneto-optical disk is used as the magneto-optical disk, the magneto-optical disk 26 is first inserted from the opening on one side of the container 14 as shown in FIG. It Then, as shown in FIG.
The tip of the magneto-optical disk 26 contacts the bent portion 19c of the slide cam plate 19 while deforming the ejection lever 23. Further, when the magneto-optical disk 26 is inserted, the slide cam plate 19 slides with respect to the slide base plate 18 in the inserting direction of the magneto-optical disk 26. As a result, the cam surface 20b of the rotary cam 20 is disengaged from the cam portion 19d of the slide cam plate 19.

The magneto-optical disk 24 is attached to the container 1
When it is completely inserted into the disk 4, the magneto-optical disk 24 is unlocked by the mechanism (not shown) provided in the container 14 and the shutter is opened. In this case, the magneto-optical disk 26 does not have a recording head insertion slot because it is for reproduction only. Therefore, the support portion 20d of the rotary cam 20 is connected to the magneto-optical disk 2
By contacting the outer surface of 6, the rotary cam 20
Does not rock. Therefore, the head-up spring 21 is also held in the same position, so that the head assembly 1
As shown in FIG. 5, the head arm 16b of No. 6 is held in a state of being pushed up by the head-up spring 21. Thus, the recording head 15 attached to the tip of the support member 16c is held at the retracted position described above.

From this state, the container 14 is swung and placed on the upper surface of the chassis 11. This allows chassis 1
The spindle 12 protruding from the upper surface of the disk 1 is engaged with the central hub of the disk 25 of the magneto-optical disk 24, whereby the disk 12 is rotationally driven at a predetermined rotational speed by the rotation of the spindle 12.

Then, a light beam from the optical pickup 13 provided below the chassis 11 is applied to a disk (not shown) of the magneto-optical disk 26 at a desired track position on the disk 25. . Then, by detecting the return light of the optical beam from the optical pickup 13 from the disc, the optical pickup 13 reproduces the information on the desired track of the disc.

At the time of ejecting the magneto-optical disk, the magneto-optical disk 26 is driven by the tension of the ejection lever 23.
The tip of the cartridge is pushed. As a result, the magneto-optical disk 26 is ejected from the inside of the container 14 to a state where it slightly protrudes. At that time, the slide cam plate 19
Is based on the tension of the slide spring 22, and the bent portion 1
9c follows the movement of the magneto-optical disk 26.

As a result, the slide cam plate 19 is
Slide base plate 1 toward the magneto-optical disk insertion side
Sliding against 8. As a result, the cam portion 19d of the slide base plate 19 has the cam surface 2 of the rotary cam 20.
It will enter below 0b. Therefore, the rotating cam 2
0 means that the cam surface 20b is held in the state shown in FIG. 3 by the cam portion of the slide base plate 19.

Thus, since the recording head 15 attached to the tip of the head arm 16 is still held at the retracted position described above, the recording head 15 may hit the cartridge of the magneto-optical disk 26 and be damaged. Is prevented.

FIG. 6 shows a modification of the rotary cam 20 used in the magneto-optical disk device 10 according to this embodiment shown in FIGS. In this case, the rotary cam 20 includes a rotary roller 20e at the tip of the supporting portion 20d.

As a result, the read-only magneto-optical disk 26
When the support portion 20d of the rotating cam 20 contacts the upper surface of the cartridge of the magneto-optical disk 26, the rotating roller 20e contacts, so that the magneto-optical disk 26 is inserted or ejected in the container 14. sometimes,
The magneto-optical disk 26 can be smoothly inserted or ejected, and the outer surface of the cartridge of the magneto-optical disk 26 is not easily scratched.

FIG. 7 shows another modification of the rotary cam 20 used in the magneto-optical disk device 10 according to this embodiment shown in FIGS. In this case, the rotary cam 20 includes an integrally formed head-up portion 21 a instead of the head-up spring 21. Then, as shown in FIG.
In order to impart elasticity in the direction of arrow C, the torsion coil spring 20f imparts right-handedness in the figure.

As a result, the head-up portion 21a can normally push up the head arm 16b of the head assembly 16 so as to separate it from the surface of the magneto-optical disk, as in the case of the head-up spring 21.

As described above, in the above-described embodiment, when the magneto-optical disk is inserted from one side of the container, the slide member is slid by the outer shape of the magneto-optical disk, and the cam portion is moved from the cam surface of the rotary cam. Come off. Here, in the case of a recording / reproducing magneto-optical disk, the support portion of the rotating cam is
Since the recording head is inserted into the recording head insertion slot of the magneto-optical disk, the recording head is moved from the retracted position described above to the recording position where it comes into contact with the disk surface.

On the other hand, in the case of the read-only magneto-optical disk, since the recording head insertion slot is not provided, the supporting portion of this rotating cam is pushed out from the container by the outer shape of this magneto-optical disk. Up to. Therefore, the recording head is held at the retracted position. Thus, based on the outer shape of the magneto-optical disk, that is, the presence / absence of a recording head insertion slot, the recording head is normally rotated by a rotating cam when not in use, when the magneto-optical disk is inserted / removed, and when the read-only magneto-optical disk is inserted. The head-up portion of (1) retracts to the outside of the path of the magneto-optical disk. Therefore, when the magneto-optical disc is inserted or removed or the read-only disc is inserted, the recording head contacts the outer shape of the magneto-optical disc,
It will not be damaged. Therefore, a highly reliable recording head lifting device can be provided.

Further, the movement of the recording head to the retreat position is interlocked with the insertion of the magneto-optical disk, and in the case of the recording / reproducing magneto-optical disc, the movement from the retreat position to the recording position is performed by the head arm. It can be done on the basis of elasticity.
Therefore, a driving means for moving the recording head to the recording position is not necessary, and the completion of the insertion of the magneto-optical disk allows the recording to be performed immediately without waiting time.
Further, since the recording / reproducing magneto-optical disc is discriminated by inserting the support portion of the rotary cam into the recording head inserting slot of the recording / reproducing magneto-optical disc, it is not necessary to provide a discriminating means. Therefore, the structure is simple, the parts cost and the assembly cost are reduced, and the entire size is reduced.

Furthermore, when the magneto-optical disk is ejected, the recording head is retracted outside the passage of the magneto-optical disk in conjunction with the ejection of the magneto-optical disk, so the user carelessly ejects the magneto-optical disk. However, the recording head will not be damaged, and the magneto-optical disk will be forcibly ejected even in the event of power failure or battery exhaustion. When the slide member is biased by the spring toward the magneto-optical disk insertion side, the slide member always inserts the magneto-optical disk cartridge in accordance with the magneto-optical disk insertion operation when the magneto-optical disk is inserted. It will surely slide while contacting the tip of the.

The cam portion of the slide member extends obliquely from the magneto-optical disc insertion side so as to be separated from the disc surface of the magneto-optical disc in the magneto-optical disc insertion direction, and is subsequently substantially parallel to the disc surface. When the slide member returns following the ejection of the magneto-optical disk when the magneto-optical disk is ejected, its cam part smoothly engages with the cam surface of the rotating cam. You can do it.

The recording head is moved so that the rotary cam connects the intermediate portion extending in the inserting direction of the magneto-optical disk and the tip of this intermediate portion on both sides of the radial movement range of the recording head of the recording head. A head-up portion that extends in the direction and can contact the head arm. When the head-up portion is urged so as to separate the head assembly from the magneto-optical disk, the recording head is magneto-optical. At any position in the radial direction of the disk, the recording head at the tip of the head assembly is reliably moved toward or away from the disk surface by the swing of the head-up portion of the rotary cam.

If the head assembly is swingably supported at the other end of the container and is provided with a spring that biases the head assembly toward the magneto-optical disk, The recording head attached to the tip of the assembly is brought into light contact with the disk surface of the magneto-optical disk by the spring. Therefore, the recording head is brought into contact with the disk surface of the magneto-optical disk with a predetermined contact pressure.

In the above-described embodiment, the magneto-optical disk drive 10 records and reproduces data on and from the magneto-optical disks 24 and 26 by loading the magneto-optical disks 24 and 26 in a substantially horizontal direction. However, the present invention is not limited to this, and it is obvious that the recording head lifting device according to the present invention can be applied to, for example, a magneto-optical disk device having a structure in which a magneto-optical disk is loaded almost vertically. .

[0084]

As described above, according to the present invention, there is provided a recording head raising / lowering device for a magneto-optical disk device, which has a simple structure to reduce the cost and to be easily miniaturized. can do.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a main part of an embodiment of a magneto-optical disk device incorporating a recording head lifting device according to the present invention.

FIG. 2 is a schematic side view of the magneto-optical disk device shown in FIG.

FIG. 3 is a schematic side view showing a main part of the magneto-optical disk device of FIG. 1 before a magneto-optical disk is inserted into a container.

4 is a schematic side view showing a main part of a state where a recording / reproducing magneto-optical disk is inserted into a container of the magneto-optical disk device of FIG.

5 is a schematic side view showing a main part of the magneto-optical disk device of FIG. 1 with a reproducing magneto-optical disk inserted in a container.

FIG. 6 is a schematic side view showing a modified example of the rotary cam of the magneto-optical disk device shown in FIG.

7 is a schematic side view showing a modified example of a rotary cam and a head-up lever of the magneto-optical disk device of FIG.

FIG. 8 is a schematic plan view showing a main part of an embodiment of a magneto-optical disk device incorporating a recording head lifting device according to the present invention.

9 is a schematic side view of the magneto-optical disk device shown in FIG.

[Explanation of symbols]

 10 magneto-optical disk device 11 chassis 12 spindle 13 optical pickup 14 container 15 recording head 16 head assembly 16a pivot 16b head arm 16c support member 17 head up mechanism 18 slide base plate 19 slide cam plate 20 rotating cam 21 head up spring 22 slide spring 23 Ejector Lever 24 Recording / Reproducing Magneto-Optical Disk 25 Disk 26 Reproduction-Only Magneto-Optical Disk

Claims (5)

[Claims] 1. In a magneto-optical disk device having a container into which a magneto-optical disk is inserted from one side, a recording head can be contacted with a disk surface of the magneto-optical disk through a recording head insertion hole provided on the container surface. A head assembly having a rotation cam for elastically pressing the head assembly in a direction away from the magneto-optical disk, the head assembly being swingably supported with respect to the container, and the container being inserted by inserting the magneto-optical disk into the container. A slide member that can slide with respect to the optical disk, and usually the rotary cam is swung in the direction in which the rotary cam pushes the head assembly away from the magneto-optical disk. The rotating cam slides in the direction The cam portion formed on the slide member so as to swing in the direction away from the air disk, and the recording / reproducing magneto-optical disk can be fitted into the recording head insertion hole in the state of being completely inserted in the container. As described above, the recording head lifting device for a magneto-optical disk device, comprising: a supporting portion formed on the rotating cam. 2. The recording head lifting device for a magneto-optical disk device according to claim 1, wherein the slide member is biased toward the magneto-optical disk insertion side by a spring. 3. The cam portion of the slide member extends obliquely from the magneto-optical disc insertion side in the magneto-optical disc insertion direction so as to be separated from the disc surface of the magneto-optical disc, and subsequently on the disc surface. 3. The recording head lifting device for a magneto-optical disk device according to claim 1, wherein the recording head lifting device is formed of substantially parallel portions. 4. The recording head so that the rotary cam connects an intermediate portion extending in the inserting direction of the magneto-optical disk on both sides of the radial movement range of the recording head to the tip of this intermediate portion. A head-up portion that extends in the direction of movement of the head arm and can contact the head arm, and the head-up portion is biased so as to separate the head assembly from the magneto-optical disk. 4. A recording head raising / lowering device for a magneto-optical disk device according to claim 1. 5. The head assembly is swingably supported at the other end of the container, and includes a spring for urging the head assembly toward the side opposite to the magneto-optical disk. 5. The recording head raising / lowering device for a magneto-optical disk device according to claim 1, wherein: