JP3095639B2 - Spindle motor unit lifting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor unit elevating mechanism provided in a magneto-optical disk drive or the like.

[0002]

2. Description of the Related Art In a magneto-optical disk drive or the like, a disk in an inserted cartridge is rotationally driven.
It is necessary to engage the spindle motor with the disk. Therefore, (1) a method in which the cartridge loading mechanism moves the cartridge to the spindle motor,
(2) The cartridge loading mechanism moves the cartridge to a predetermined place, and the spindle motor moves to and engages with the cartridge by another mechanism.

[0003]

However, in the method (2), a drive source for moving the spindle motor is required. However, if this drive source is arranged near the spindle motor, the components related to the spindle motor unit will be reduced. There is a problem that the installation space is reduced and the apparatus becomes large.

[0004] The present invention has been made in view of the above problems, and an object of the present invention is to provide a spindle motor elevating mechanism capable of downsizing the apparatus.

[0005]

The present invention for solving the above problems is provided so as to be movable in a vertical direction with respect to a base,
A spindle motor unit that engages with a disk in a cartridge inserted substantially parallel to the base and rotationally drives the disk; and a spindle motor that is movably provided between the spindle motor unit and the base in the cartridge insertion direction. In a spindle motor unit elevating mechanism having a slide base in which a unit is engaged and a guide portion for guiding the spindle motor unit in a direction perpendicular to the base and a drive source for driving the slide base relative to the base, The drive source is provided behind the spindle motor unit when viewed from the cartridge insertion direction.

More specifically, a slide base is
The drive source that is driven in such a manner that an output shaft in a direction substantially perpendicular to the moving direction of the slide base, a disk attached to the output shaft, and an eccentric pin provided on the disk are provided, and the eccentric pin is provided on the slide base. der one provided an engagement plate abutting
You .

In consideration of the displacement of the slide base, the engagement plate is provided on the slide base so as to be able to swing on a plane parallel to the base surface, and further, is guided by the guide so as to be in contact with the surface of the disk . It is desirable to be guided so as to be movable in a substantially parallel direction.

[0008]

In the spindle motor unit elevating mechanism according to the present invention, the drive source is provided deeper than the spindle motor unit when viewed from the cartridge insertion direction, thereby facilitating installation of the spindle motor-related parts of the spindle motor. Is reduced in size.

The slide base is provided with an engagement plate provided in a direction orthogonal to the moving direction of the slide base, and an output shaft in a direction orthogonal to the moving direction of the slide base is mounted on the drive source, and the output shaft is mounted on the output shaft. By providing the provided disc and the eccentric pin provided on the disc and engageable with the engagement plate of the slide base, the installation space for the drive mechanism of the slide base can be reduced.

Further, since the engagement plate is guided so as to be movable in a direction substantially parallel to the surface of the disk, engagement with the eccentric pin can be ensured even if the slide base is shaken.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a spindle motor unit elevating mechanism according to one embodiment of the present invention, FIG. 2 is an enlarged perspective view of a slide base in FIG. 1, FIG. 3 is a view for explaining the operation of the spindle motor unit elevating mechanism, and FIG. FIG. 5 is an exploded perspective view for explaining the operation of the spindle motor unit elevating mechanism, and FIG. 5 is an exploded perspective view for explaining the entire magneto-optical disk device provided with the spindle motor unit elevating mechanism of the present embodiment.

First, the entire magneto-optical disk drive will be briefly described with reference to FIG. In the drawing, reference numeral 1 denotes a frame, and 2 denotes a base which is disposed on a base mounting bracket 1a formed on the front side of the frame 1 and is mounted using screws 3.

On the upper surface of the base 2, an external magnetic field mechanism 4 which covers the disk cartridge to be set and applies a bias magnetic field to the magneto-optical disk 10 in the disk cartridge.
And a cartridge box 5 provided with a shutter opening / closing mechanism for a disk cartridge to be set and a brake mechanism. On the cartridge box 5,
A dust cover 6 is provided.

The base 2 has a rectangular opening 2a and a circular opening 2b. A carriage 14 having a lens actuator 7 for irradiating a laser beam to the magneto-optical disk 10 of the set disk cartridge and performing focusing / tracking on the magneto-optical disk 10 is disposed in the opening 2 a. A spindle motor unit 8 for rotating and driving the magneto-optical disk 10 is disposed on the back surface (the surface opposite to the surface facing the disk cartridge 80 to be inserted), and the opening 2b is provided with a The turntable portion 8a engaged with the hub 10a is engaged. A main board 9 is provided on a dustproof cover 6 that covers the cartridge box 5 via a space.

In FIG. 1 and FIG. 2, reference numeral 130 is provided so that the distal end portion engages with the rails 12 and 13 and the proximal end portion is attached to the base 2 using screws 131, and bridges the opening 2a of the base 2. A fixing bracket for fixing the rails 12 and 13 to the base 2.

Reference numeral 120 denotes a substantially L-shaped slide base provided on the back surface of the base 2 (the surface opposite to the surface facing the disk cartridge 80 to be inserted). Screws 121, 122 erected on the base 2 are fitted to both ends of the slide base 120, and the rails 12, 1 are engaged.
Slots 123 and 124 extending in three directions are formed.

An elongated hole 133 extending in the direction of the rails 12 and 13 is also formed at the tip of the slide base 120, and the elongated hole 133 is a screw 134 that is screwed to the back surface of the base 2.
Are engaged.

The slots 123, 124 and 133 are set so that the slide base 120 has some degree of freedom in rotation. One end of the slide bases 125 and 126 is engaged with the slide base 120, and the other end is engaged with pins 127 and 128 erected on the back surface of the base 2.
0 is a spring that biases the optical housing 60 away from the optical housing 60.

The spindle motor unit 8 is formed with holes 129 and 130 for engaging pins 118 and 119 erected on the back surface of the base 2, and the spindle motor unit 8 is mounted on the pins 118 and 119 with respect to the base 2. Can be moved only along, that is, it can move vertically with respect to the base 2
(Can be moved up and down).

Further, a pin 140 is provided on one side of the spindle motor unit 8, and a pin 141 is provided on the other side.
Are respectively erected. On the other hand, the slide base 12
0, two standing wall portions 142, 1 formed on one side.
43 has a guide groove 142a, 1 with which the pin 140 is engaged.
43a are two standing wall portions 14 formed on the other side.
4 and 145 have guide grooves 144 with which the pins 141 engage.
a and 145a are formed respectively. Each guide groove 1
42a, 143a, 144a, the shape of 145a, the slide base 120 extends obliquely upward in a direction away from the optical housing 60, and then out the surface and extends substantially parallel to the slide base 120.

Therefore, the pins 11 erected on the base 2
The spindle motor unit 8 that engages with the
By moving the slide base 120 away from the optical housing 60, the disc cartridge 80
The slide base 120 moves in the direction (up), and moves in the direction away from the disk cartridge 80 by moving the slide base 120 in the direction of the optical housing 60 (down).

On the surface of the base 2, a lock lever 150 is rotatably provided by using a pin 149. One rotating end of the lock lever 150 extends to the back surface side of the base 2 through a hole 151 formed in the base 2 and can engage with an engaging portion 152 formed at the tip of the slide base 120. Lock portion 150a is formed. Further, the other rotating end of the lock lever 150 is provided with a lock release portion 150b which can abut against the erroneous insertion prevention slope 79 of the disk cartridge 80 to be inserted. 1
Reference numeral 62 denotes an intermediate portion wound around the pin 149, one end portion of which is locked to the base 2, the other end portion of which is locked to the lock lever 150, and a lock release portion 150b of the lock lever 150.
Is a spring that urges the disc cartridge 80 into a position where it can come into contact with the erroneous insertion prevention slope 79 of the disc cartridge 80 to be inserted.

An engagement plate 153 is attached to the tip end of the slide base 120 using pins 154 so as to be swingable on a plane parallel to the surface of the base 2. Reference numeral 155 denotes an eject motor provided behind the spindle motor unit 8 when viewed from the direction in which the disk cartridge 80 is inserted.

An eccentric pin 157 is provided on a disk 156 attached to an output shaft of an eject motor 155 provided in a direction orthogonal to the direction of movement of the slide base 120. On the other hand, a cut-and-raised portion 158 with which the eccentric pin 157 can contact is formed at the rotating end of the engagement plate 153, and the eccentric pin 157 is engaged with the cut-and-raised portion 158 by the drive of the eject motor 155. The slide base 120 is moved in the optical housing 60 direction. Reference numeral 160 denotes a guide plate provided on the back surface of the base 2 and formed with a groove 161 in which the upper portion of the engagement plate 153 engages. The engagement plate 153 can be moved only in a direction substantially parallel to the disk 156. ing.

Next, the operation of the above configuration will be described with reference to FIGS. 3 shows a state where the disk cartridge 80 is not inserted, and FIG. 4 shows a state after the disk cartridge 80 is inserted.

In FIG. 3, the lock portion 150a of the lock lever 150 is engaged with the engagement portion 152 of the slide base 120.
, The movement of the slide base 120 urged away from the optical housing 60 by the springs 125 and 126 is prohibited, the spindle motor unit 8 is in the lowered state, and the turntable portion 8a is In the opening 2b.

Here, when the disk cartridge 80 is inserted on the surface of the base 2, the disk cartridge 80
Of the lock lever 150 presses the lock release portion 150b of the lock lever 150, and rotates the lock lever 150 counterclockwise in the drawing against the urging force of the spring 162. The engagement of the slide base 120 with the engagement portion 152 is released.
Then, as shown in FIG.
The slide base 120 moves in a direction away from the optical housing 60 due to the urging force of. By the movement of the slide base 120, the spindle motor unit 8 moves up, the turntable portion 8a protrudes from the opening 2b of the base 2, and the magneto-optical disk 1 of the disk cartridge 80
0 hub 10a.

When the inserted disk cartridge 80 is ejected, the eject motor 155 is driven, and the eccentric pin 157 presses the cut-and-raised portion 158 of the engagement plate 153 of the slide base 120 to move the slide base 120. It is moved in the direction of the optical housing 60.
By the movement of the slide base 120, the engaging portion 152 of the slide base 120 engages with the lock portion 150a of the lock lever 150, and returns to the state of FIG.

According to the spindle motor unit elevating mechanism having the above-described structure, the drive source for vertically moving the spindle motor unit is not disposed near the spindle motor unit as in the prior art, but the eject motor 155 as the drive source is provided.
Is provided behind the spindle motor unit 8 when viewed from the insertion direction of the disk cartridge 80, so that components related to the spindle motor unit (for example, a spindle motor drive circuit and the like) can be easily arranged, and the magneto-optical disk device can be downsized. can do.

The slide base 120 is only completely straight direction, the screw 121,122,134 and the slide base 12
When guided by the long holes 123,124,133 0, scan
Guide grooves 142a, 143a14 of ride base 120
When there are variations in the positions of the pins 4a and 145a and in the positions of the pins 140 and 141 of the spindle motor unit 8, all the guide grooves 142a, 143a, 144a and 1
45a does not push all the pins 140 and 141 at the same time, and the pressing force becomes non-uniform, resulting in a single push.

However, in this embodiment, the slide base 1
Slots 123, 12 so that some freedom of rotation remains in 20
4,133, so that, for example, one of the guide grooves 142a, 144a has the pin 140,
Even if it hits 141, the slide base 120 rotates a little and moves until the other guide groove hits the other pin, and the pressing force of the pins 140 and 141 becomes uniform.

If the pressing forces of the pins 140 and 141 are not uniform, the spindle motor unit 8 will not adhere to the base 2 and will tilt. This causes a problem that the disk surface of the magneto-optical disk 10 is inclined with respect to the base 2, that is, with respect to the optical pickup, and the detection performance is significantly reduced.

The pin 1 of the spindle motor unit 8
Due to variations in the processing accuracy of parts such as the shapes and positions of 40 and 141 and the shapes and positions of the guide grooves 142a, 143a, 144a and 145a of the slide base 120, the slide base 120 moves on the base 2 when the spindle motor unit 8 moves up and down. Even when the guide plate 160 rotates, the engagement plate 153 that can move only in one direction is not shaken, so that the driving force of the eject motor 155 is reliably transmitted to the slide base 120. Therefore, slide base 1
20 and adjustment of the assembly is not required.

[0034]

As described above, according to the present invention, since the drive source is provided at the back of the spindle motor unit when viewed from the cartridge insertion direction, it is easy to install parts of the spindle motor related to the spindle motor unit. Thus, the size of the device can be reduced.

The slide base is provided with an engagement plate provided in a direction perpendicular to the direction of movement of the slide base, and the drive source is provided with an output shaft in a direction perpendicular to the direction of movement of the slide base, and mounted on the output shaft. By providing the provided disc and the eccentric pin provided on the disc and engageable with the engagement plate of the slide base, the installation space for the drive mechanism of the slide base can be reduced.

Further, since the engagement plate is guided so as to be movable in a direction substantially parallel to the surface of the disk, engagement with the eccentric pin can be ensured even if the slide base is shaken.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spindle motor unit elevating mechanism according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a slide base in FIG.

FIG. 3 is a view for explaining the operation of a spindle motor unit elevating mechanism.

FIG. 4 is a diagram illustrating the operation of a spindle motor unit elevating mechanism.

FIG. 5 is an exploded perspective view illustrating the entire magneto-optical disk device provided with the spindle motor unit elevating mechanism according to the present embodiment.

[Explanation of symbols]

 2 Base 8 Spindle motor unit 80 Disk cartridge 120 Slide base 142a, 143a, 144a, 145a Guide groove 140, 141 pin

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 25/04 G11B 17/04

Claims (2)

(57) [Claims] A spindle motor unit provided to be movable in a vertical direction with respect to a base, engaged with a disk in a cartridge inserted substantially parallel to the base, and rotationally driving the disk; and a spindle motor. A guide portion is provided movably in the cartridge insertion direction between the unit and the base, engages the spindle motor unit, and guides the spindle motor unit in a direction perpendicular to the base. A spindle motor unit having a slide base and a drive source for driving the slide base with respect to the base, wherein the drive source is provided deeper than the spindle motor unit when viewed from the cartridge insertion direction , The drive source is substantially orthogonal to the moving direction of the slide base.
Output shaft, and a disk attached to the output shaft
And an eccentric pin provided on the disc, and an engaging plug that the eccentric pin abuts on the slide base.
Rate, and the slide base is moved forward with respect to the engagement plate.
A spindle motor unit elevating mechanism provided so as to be swingable on a plane parallel to the base . 2. The engaging plate is moved forward by a guide.
2. The spindle motor unit elevating mechanism according to claim 1, wherein the spindle motor unit is guided so as to be movable in a direction substantially parallel to a surface of the disk .