JPH06290525A - Magneto-optical disk device - Google Patents

Abstract

PURPOSE:To protect a spindle motor from impact attending upon sudden movement of a slide cam by providing a buffer means for applying the brakes to movement of an elevator mechanism for a spindle motor holding member. CONSTITUTION:A turning plate 51 is provided with a rack part 51a, and an oil damper 61 is provided as the buffer means to be meshed with the rack part 51a. A cartridge 1 is inserted into a cartridge holder 22, and when the slide cam 24 energized by a spring is released from locking, the plate 51 is turned around a turning shaft 52a, and is stopped in a position where an abutting surface of the plate 51 is abutted against an abutting surface of the holder 22. At this time, since the plate 51 is braked by a damper 61, its movement is slowly performed. Consequently, impact to be transmitted to a spindle motor 3 fixed to the plate 51 becomes insignificant, and hence the motor 3 is protected.

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 device, and more particularly to a disk cartridge loading mechanism.

[0002]

2. Description of the Related Art Conventionally, in a magneto-optical recording apparatus for recording, reproducing, and erasing information on a magneto-optical recording medium, a cartridge having the magneto-optical recording medium housed therein is provided with an operating position inside the apparatus from a cartridge insertion position. Equipped with a loading mechanism that moves up to. Such a loading mechanism is shown in FIGS. 8 and 9, where FIG. 8 shows a state before the disc cartridge is inserted, and FIG. 9 shows a state after the loading is completed.

In the figure, reference numeral 2 is a disk (magneto-optical recording medium), which is housed in a cartridge 1. Reference numeral 3 is a spindle motor for rotating the disk 2. Reference numeral 4 is a holder prepared for transporting the disc cartridge 1 from the inserted position to the operating position, and is configured to be movable only up and down by guide means (not shown). Reference numeral 6 is a bias magnet that applies a magnetic field to the disk 2,
It is composed of an electromagnet. Bias magnet 6
Is rotatably supported by the support lever 7 about a shaft 8 provided at one end thereof, and the support lever 7
Has its other end supported by a support member 9 fixed to the frame so as to be rotatable around a shaft 10 provided therein.

Reference numerals 11a and 11b are stoppers provided on the holder 4, and both ends of the bias magnet 6 are provided with the stoppers 11a and 11b after loading.
By contacting b, the height of the bias magnet 6 is determined. In the state before loading, the protrusion 7a at the lower center of the support lever 7 contacts the upper surface of the holder 4, so that the bias magnet 6 is pushed up by the holder 4 and is in the position shown in FIG. Therefore, the bias magnet 6 does not interfere with the inserted cartridge 1.

When the cartridge 1 is inserted to the predetermined position of the holder 4, the locking means (not shown) of the holder 4 is released, so that the holder 4 descends as shown in FIG.
Along with that, the bias magnet 6 also descends and approaches the disk 2. The bias magnet 6 is biased by a spring (not shown) around the shaft 8 in the direction of the arrow in the drawing. Further, since the bent portion 7c of the support lever 7 serves as a rotation stopper for the bias magnet 6, the bias magnet 6 is held parallel to the cartridge 1 even in the state shown in FIG.

However, in such a structure, in order to prevent the bias magnet 6 from interfering with the insertion of the cartridge, the bias magnet 6 is retracted above the magnetic field application position, so that the bias magnet is located. The area portion becomes thicker than the other portions, which greatly hinders the thinning of the magneto-optical recording apparatus. In addition, an electric circuit board is often provided above the device, but in this case also, the bias magnet 6 interferes with the circuit board, and it is necessary to make a hole only in the portion of the circuit board corresponding to the bias magnet. In addition, there is a drawback that parts cannot be mounted.

Therefore, as a means for solving the above-mentioned drawbacks, a magneto-optical recording device as shown in FIGS. 4 to 7 has already been devised. Here, FIGS. 4 and 6 show a state before the disc cartridge is inserted into the apparatus, and FIG.
7 and 8 show a state where the loading of the disc cartridge is completed. Reference numeral 2 is a magneto-optical disk, which is housed inside the disk cartridge 1. Further, reference numeral 21 is a disc cartridge 1
The shutter is openable and closable so as to cover the opening. Further, reference numeral 22 is a cartridge holder for guiding the inserted cartridge 1 to the operating position,
It is fixed to the frame. A shutter opening / closing lever 31 is rotatably supported on the upper surface of the cartridge holder 22 about a shaft 32. The shutter opening / closing lever 31 has a coil spring 33 provided at one end thereof.
Is urged in the direction of the arrow in the figure. The other end of the shutter opening / closing lever 31 has a shutter opening / closing pin 34.
The shutter opening / closing pin 34 is engaged with the end 21a of the shutter 21.

Further, reference numeral 51 is a rotary plate, one end of which is rotatably supported with respect to the frame, as a spindle motor holding member. A spindle motor 3 for rotating the disk 2 and positioning pins 27a to 27d for positioning the cartridge 1 at the operating position are fixedly mounted on the rotary plate 51. A drive system such as a linear motor and an optical head is fixed to the frame body, and a guide roller 53 is rotatably provided on the side surface of the rotary plate 51. Incidentally, reference numeral 24 is a slide cam provided so as to be slidable in a direction parallel to the cartridge insertion direction. Cam grooves 25 that engage with the guide rollers 53 are provided in the slide cam 24 at the rising portions on both sides. The cam groove 25 includes a horizontal portion 25a and an inclined portion 25b, and the slide cam 24 is provided with guide grooves 24a and 24b.
It is slidably engaged with the guide pins 54a and 54b planted in the frame. The slide cam 24 is constantly urged toward the front panel 30 having the cartridge insertion port 29 by the coil springs 28a and 28b.

Reference numeral 35 is a detection lever, which is rotatably supported about a shaft 36 implanted in the frame, and is biased by a torsion spring 37 in the direction of the arrow in the figure. In the state of FIG. 6, the recess 35a of the detection lever 35 is engaged with the lock pin 38 provided on the slide cam 24, and the slide cam 24 is separated from the front panel 30 against the urging force of the spring 28. Hold in position. When the cartridge 1 is inserted, the end portion 35b of the detection lever 35 is pushed by the front end of the cartridge 1 and the engagement between the recessed portion 35a and the lock pin 38 is released, so that the slide cam 24 is biased by the spring 28 to the front panel side. Move to. Further, reference numeral 39 is an eject motor unit, and a rotating plate 40 rotated by a motor,
It is composed of a pin 41 provided near the outer periphery of the rotary plate 40. During the ejecting operation of the cartridge, the pin 41 rotates in the direction of the arrow in the figure, so that the protrusion 24 of the slide cam 24 that abuts the pin 41.
By pressing e and, the slide cam 24 moves backward.

Reference numeral 42 is a bias magnet, which is provided on the cartridge holder 22 so as to be retracted.
It is slidably guided by the guide rails 55a and 55b of the book. A pin 56 provided on the rear portion 42a of the bias magnet 42 is engaged with a round long hole 57a provided at one end of the turning lever 57, and the turning lever 57 is provided.
Is rotatably supported by the frame body at the other end. The rotation lever 57 is biased by the torsion spring 45 so that the bias magnet 42 is located rearward. A pin 46 is planted on the slide cam 24, and the pin 46 is attached to the rotary lever 5.
By pulling 7 forward, the bias magnet 42 is pulled out to the operating position.

Next, the operation during loading will be described. The state before the loading of the cartridge 1 is shown in FIGS. 4 and 6, but when the disk cartridge 1 is further inserted from this state, the shutter opening / closing pin 34 of the shutter opening / closing lever 31 causes the end 21a of the shutter 21 to move.
Abut. When it is further inserted, the shutter opening / closing lever 31 rotates in the direction opposite to the arrow in the figure, and the shutter 21 opens. Before the shutter 21 is fully open,
The side surface of the cartridge 2 comes into contact with the end portion 35b of the detection lever 35, and by further pushing in the cartridge, the detection lever 35 is rotated in the direction opposite to the arrow, and as shown in FIG. The engagement of the lock pin 38 is released. In this way, when the engagement is released, the slide cam 24 is moved by the urging force of the spring 28 as shown in FIG.
Move to the position shown in FIG. In response to the movement of the slide cam 24, the pin 46 pulls and rotates the rotation lever 57, so that the bias magnet 42 is moved from the retracted position of FIG. 4 to the operating position of FIG.

Before loading, the guide roller 53 of the rotating plate 51 is in the horizontal portion 25a of the cam groove 25 of the slide cam 24, and the free end side of the rotating plate 51 is
Since it is located below, the spindle motor 3 and the positioning pins 27a to 27d do not hinder the insertion of the cartridge 2. When the slide cam 24 moves, the guide roller 53 is guided by the inclined portion 25b of the cam groove 25, the rotating plate 51 rotates about the shafts 52a and 52b, and the abutting surface 60 provided on the cartridge holder 22. Abut. By this operation, the spindle motor 3 and the positioning pins 27a to 27d move upward, and the disk is clamped and the cartridge is positioned, respectively. At the time when the movement of the bias magnet 42 is started, the shutter 21 of the cartridge 1 is completely opened.
There is no fear of collision with 1. The cartridge 1 with the shutter 21 fully opened has its bridge portion 1a.
Also, since the thickness 21a of the shutter 21 is almost the same as that of the disk 2, it does not come into contact with the bias magnet 42 that has moved.

The operation at the time of ejection is performed as follows. When the eject command is received, the rotary plate 40 of the eject motor unit 39 starts to rotate in the direction of the arrow from the position of FIG. 5, and the pin 41 pulls the slide cam 24 rearward against the biasing force of the spring 28. At this time, the pin 46 that has pressed the rotating lever 57 also moves rearward, so that the bias magnet 42 retracts toward the retracted position shown in FIG. 4 by the restoring force of the torsion spring 45. Further, since the guide roller 53 located on the inclined portion 25b of the cam groove 25 of the slide cam 24 is guided to the horizontal portion 25a of the cam groove 25 by the movement of the slide cam 24, the free end side of the rotating plate 51 is It is moved downward as shown in FIG. Therefore, the spindle motor 3 and the positioning pins 27a to 27d are also lowered so that the disc cartridge 1 can be ejected. In the state of FIG. 7, since the lock pin 38 of the slide cam 24 is in contact with the straight portion 35c of the detection lever 35, the detection lever 35 cannot rotate, but when the slide cam 24 moves almost to the end, it is locked. Since the pin 38 is disengaged from the linear portion 35c, the force of the torsion spring 37 causes the detection lever 35 to move.
Rotates in the direction of the arrow. The rotational force of the detection lever 35 causes the cartridge 1 to be ejected from the cartridge holder 22. The state of FIG. 4 can be achieved when the pin 41 of the eject motor unit 39 reaches the position A, but if the eject motor is stopped as it is, the slide cam 24 cannot move forward when the loading is performed next time. Therefore, it is necessary to further rotate the eject motor by a half turn and stop it at the position B. Therefore, the eject motor is stopped using a limit switch or the like. As described above, the plate to which the spindle motor is attached moves up and down when the disk cartridge is loaded and ejected, so that the space of the apparatus can be efficiently used.

[0014]

However, in the above-mentioned conventional example, when the lock pin provided on the slide cam is released from the engagement by the pushing of the disk cartridge, especially when the disk cartridge is loaded, the slide cam is released. Will move to the operating position all at once due to the biasing force of the spring. For this reason, the rotating plate that is interlocked with the slide cam violently collides with the abutting surface provided on the cartridge holder. Due to this impact, a large load is applied to the spindle motor engaged with the rotating plate,
Significant errors occur in the flatness of the turntable and the angle of the rotary shaft, and in some cases, the spindle motor itself may be damaged.

[0015]

SUMMARY OF THE INVENTION The present invention has been made based on the above circumstances, and a spindle motor is provided by providing a buffering means for damping abrupt movement of a spring-biased slide cam during loading of a disk cartridge. An object of the present invention is to provide a magneto-optical disk device which is protected from this impact.

[0016]

Therefore, in the present invention,
A cartridge holder for guiding a cartridge containing a magneto-optical recording medium, a spindle motor for rotating the magneto-optical recording medium, a spindle motor holding member having a positioning pin for positioning the cartridge, and the cartridge in the cartridge device. A magneto-optical recording apparatus equipped with a mechanism for raising and lowering the spindle motor holding member in association with insertion and ejection of the spindle motor holding member is provided with a cushioning means for braking the movement of the raising and lowering mechanism of the spindle motor holding member.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
This will be specifically described with reference to. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.
The features of the present invention will be fully described. As already mentioned, in the figure, reference numeral 51 is a rotating plate,
On top of that, the spindle motor 3 and the positioning pin 27
Although a and 27b are arranged, in particular, the rotating plate 51
A rack portion 51a is provided on the rotary type oil damper 6 with a gear so as to mesh with the rack portion 51a.
1 is provided as a buffering means. The oil damper 61 is fixed to the side plate 62, as shown in FIG. Then, the cartridge 1 is placed in the cartridge holder 22.
When the slide cam is inserted and the lock of the slide cam biased by the spring is released, the rotation plate 51 rotates around the rotation shaft 52a in the arrow direction in the figure along the guide groove of the slide cam. The stop surface of the rotating plate 51 stops at the position where it contacts the contact surface of the cartridge holder.
At this time, the rotating plate 51 is moved slowly because it is braked by the damper 61. Therefore, the impact transmitted to the spindle motor fixed to the rotating plate is small, and the spindle motor can be protected.

In this embodiment, the spindle motor is moved by the rotating operation.
The movement may be parallel, and the movement method is not particularly limited.

FIG. 10 shows the second embodiment of the present invention.
Here, the rack portion is provided not on the rotating plate 51 but on the slide cam 24. Then, slide cam 2
Since the rotating plate 51 is rotated in accordance with the horizontal movement of 4, the rack portion 24f provided on the slide cam 24 is replaced with the rotary oil damper 61 with gears fixed to the frame body. By engaging with each other, it is possible to apply a braking force to the movement of the slide cam 24, and as a result, a braking force to the movement of the rotating plate 51, and it is possible to prevent an impact on the spindle motor.

[0020]

As described above, according to the present invention, the holding member provided with the spindle motor and the positioning pin is interlocked with the loading operation of the disk cartridge.
In a loading mechanism of the type that moves from a retracted position to an operating position, a spindle is provided by providing a buffering means for braking the movement of the lifting mechanism of the holding member when the holding member moves to the operating position during loading. It is possible to maintain the flatness of the turntable and the accuracy of the rotation axis inclination without applying unreasonable force or vibration to the motor, and also to prevent damage to the spindle motor itself, and to obtain a highly reliable loading mechanism. You can

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention before the cartridge is inserted.

FIG. 2 is a side view showing the above embodiment in a state after the cartridge is inserted.

FIG. 3 is a plan view showing the embodiment described above in a state before the cartridge is inserted.

FIG. 4 is a plan view showing an aspect of the previously proposed device.

FIG. 5 is a plan view showing the device in a state after the cartridge is inserted.

FIG. 6 is a side view showing the device in a state before the cartridge is inserted.

FIG. 7 is a side view showing the same device after the cartridge is inserted.

FIG. 8 is a side view showing a conventional example in a state immediately before the completion of insertion of the cartridge.

FIG. 9 is a side view showing a conventional example in a state after the cartridge is inserted.

FIG. 10 is a plan view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 cartridge 2 disk (magneto-optical recording medium) 3 spindle motor 4 holder 22 cartridge holder 24 slide cam 25 cam grooves 27a, 27b positioning pin 51 rotating plate (spindle motor holding member) 61 oil damper (buffer means) 62 side plate

Claims (1)

[Claims] 1. A cartridge holder for guiding a cartridge containing a magneto-optical recording medium, a spindle motor for rotating the magneto-optical recording medium, a spindle motor holding member having a positioning pin for positioning the cartridge, and a cartridge device. In a magneto-optical recording apparatus equipped with a mechanism for raising and lowering the spindle motor holding member in association with the insertion and ejection of the cartridge into and from, a buffer means for damping the movement of the raising and lowering mechanism of the spindle motor holding member is provided. A magneto-optical recording device characterized by the above.