JPH0684260A - Shutter opening device - Google Patents

Abstract

(57) [Summary] [Structure] An inclined portion 103a that generates a component force for rotating the shutter opening pin 104 that opens the shutter member 211 of the disk cartridge 201, and the inclined portion 103a.
Arcuate portion 103b which is continuously provided to further rotate the shutter opening pin 104, and the arcuate portion 103b.
And a linear portion 103c for moving the shutter opening pin 104 as the disc cartridge 201 is inserted.
And a cam groove portion 103 composed of [Effect] The movement path of the shutter opening pin support member can be made small, and the device can be made compact and thin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter opening device for opening a shutter member of a disc cartridge, for example.

[0002]

2. Description of the Related Art For example, as a magneto-optical disk device for writing and / or reading an information signal to / from a magneto-optical disk rotatably housed in a cartridge, a disk cartridge is conveyed to a predetermined mounting position. It is composed of a loading mechanism, a rotary drive mechanism for rotating the magneto-optical disk at the mounting position, an optical pickup device for writing and reading information signals to and from the magneto-optical disk, and an external magnetic field generator.

The loading mechanism has a cartridge holder configured to hold the disc cartridge, and is configured to move and operate the cartridge holder using a cam or the like.

In such a loading mechanism, when the disc cartridge held by the cartridge holder is moved in a direction parallel to the chassis and conveyed right above the rotation drive mechanism, the disc cartridge is moved relative to the chassis. It is designed so that it can be lowered in the direction in which it approaches. The magneto-optical disk in the disk cartridge lowered in the direction close to the chassis is held by the rotation drive mechanism arranged on the chassis.

The rotary drive mechanism comprises a spindle motor and a disk table fixed to the spindle shaft of the spindle motor. The magneto-optical disk is held on the disk table for rotation operation. ing.

On the other hand, the optical pickup device and the external magnetic field generating device are respectively provided at positions facing each other with the magneto-optical disc mounted on the disc table sandwiched therebetween. The external magnetic field generator moves up and down with respect to the disc cartridge by an actuator or the like so as not to come into contact with the disc cartridge until the disc cartridge is transported to a predetermined mounting position and placed on the disc table. It is designed to do.

In the above-mentioned magneto-optical disk device, when the disk cartridge is inserted into the cartridge holder, the shutter member provided in the disk cartridge is opened and the signal of the magneto-optical disk housed in the cartridge is opened. It is necessary to expose a part of the recording surface to the optical pickup device and the external magnetic field generator arranged in the device. Therefore, the cartridge holder is provided with a shutter opening mechanism that opens the shutter member in accordance with the loading operation of the disc cartridge.

For example, as shown in FIG. 33, the shutter opening mechanism has a shutter opening pin 503 on one end side that faces a slit 502 formed by an arcuate portion 502a and a straight portion 502b formed on the upper surface of the cartridge holder 501. Shutter release lever 504.

On the other end side of the shutter release lever 504, a guide shaft 506 which faces a slotted guide groove 505 provided in parallel with the straight portion 502b of the slit 502.
Is provided. And this shutter release lever 5
04 is urged by a tension coil spring (not shown) so that the shutter opening pin 503 provided on the tip side thereof is always positioned at the initial position which is the base end side of the arcuate portion 502a of the slit 502.

When the disk cartridge 507 is inserted into the cartridge holder 501 having the shutter opening mechanism constructed as described above, the shutter opening pin 503 comes into contact with one side portion 508a of the shutter member 508 of the disk cartridge 507. When the disc cartridge 507 is further inserted in the depth direction, the shutter opening pin 503 causes the disc cartridge 507 to move.
Is pressed by the front part of the and moves along the slit 502,
The shutter member 508 is gradually opened.

When the shutter opening pin 503 reaches the linear portion 502b, the shutter member 508 is fully opened and the guide shaft 506 is brought into contact with the front surface portion of the disk cartridge 507. Then, in this state, the shutter opening lever 504 causes the cartridge holder 50 to move.
It is carried to the rear by 1.

[0012]

By the way, as shown in FIG. 33, when the starting end position of the shutter opening pin 503 is brought right under the guide shaft 506, the shutter opening pin 503 has a disk cartridge 507. Since no component force is generated in the direction orthogonal to the insertion direction, the shutter opening pin 503 cannot be moved along the slit 502.

That is, the shutter member 508 of the disk cartridge 507 cannot be opened. Therefore, the start end position of the shutter opening pin 503 is set to the guide shaft 50.
6 or it is necessary to shift the guide shaft 506 with respect to the starting end position of the shutter opening pin 503.

The amount of deviation is at least the angle between the straight line connecting the shutter opening pin 503 and the guide shaft 506 and the inserting direction of the disc cartridge 507 is 25.
More than once is required. Therefore, the shutter release lever 5
04 is required to be disposed obliquely with respect to the insertion direction of the disc cartridge 507.
There is a risk that 04 will come into contact with other parts attached to the cartridge holder 501.

In addition, as shown in FIG. 34, the positional relationship between the shutter opening pin 503 and the guide shaft 506 is maintained, and the arcuate portion 502a of the slit 502 is inclined with respect to the insertion direction of the disc cartridge 507. By forming the portion 502c, the shutter opening pin 50 is formed.
It is conceivable that the shutter member 508 is opened by generating a component force in the third direction in the direction orthogonal to the insertion direction of the disc cartridge 507.

In this case, however, the locus of movement of the shutter opening lever 504 becomes large, and the rear end of the shutter bulges outward more than the cartridge holder 501. As a result, an accident occurs in which the member comes into contact with another member provided outside the cartridge holder 507, and the magneto-optical disk device cannot be downsized.

Therefore, the present invention has been proposed in order to solve such a conventional technical problem, and the movement locus of the support member for opening the shutter member can be made small, and the apparatus can be made compact and thin. It is an object of the present invention to provide a shutter opening device that can be expected by the customer.

[0018]

SUMMARY OF THE INVENTION A shutter opening device of the present invention comprises an inclined portion for generating a component force for rotating an opening member for opening a shutter member of a disk cartridge, and an inclined portion provided continuously to the inclined portion. The cartridge holder is provided with a cam groove formed by a rotating portion for further rotating the opening member, and a linear portion continuous with the rotating portion for moving the opening member when the disc cartridge is inserted. The opening member is moved in the cartridge holder along the cam groove portion.

The cartridge holder is provided with a guide portion parallel to the straight portion of the cam groove portion, an opening member is attached to one end side, and an engaged portion which engages with the guide portion is attached to the other end side. And a supporting member provided.

The support member moves together with the opening member along with the movement of the disc cartridge in the loading direction when the opening member reaches the straight portion from the rotating portion.

In the state before the disc cartridge contacts the opening member, the center position of the opening member for opening the shutter member is displaced toward the shutter opening side with respect to the center of the guide portion in the width direction.

[0022]

According to the present invention, when the disc cartridge is inserted into the cartridge holder from the state where the opening member for releasing the shutter member of the disc cartridge is at the inclined portion of the cam groove portion at the starting end position, the disc cartridge is pushed by the disc cartridge. A component force for rotating the opening member is generated in the opening member. Therefore, the opening member becomes movable along the cam groove portion, and the shutter member is opened as the opening member moves.

Further, in the state before the disc cartridge comes into contact with the opening member, the center position of the opening member for opening the shutter member is displaced toward the shutter opening side with respect to the center of the guide portion in the width direction. When the disc cartridge is inserted into the cartridge holder, the shutter member can be smoothly opened by the opening member regardless of the parts precision and the assembly precision.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments to which the present invention is applied will be described in detail below with reference to the drawings. The present embodiment is an example in which the present invention is applied to a magneto-optical disk device that records and / or reproduces data on a magneto-optical disk.

First, a disk cartridge in which a magneto-optical disk mounted in this magneto-optical disk device is rotatably accommodated will be described.

[1] Structure of Disc Cartridge As shown in FIGS. 17 and 18, the disc cartridge 201 includes a magneto-optical disc 202 in the form of a disc,
And a cartridge 203 that rotatably accommodates the magneto-optical disk 202.

The magneto-optical disk 202 has a magnetic recording layer in the data recording area, and can write and / or read information signals to / from the magnetic recording layer by magneto-optical means. Is. In this magneto-optical disk 202, one main surface portion is a signal recording surface. A disc-shaped chucking hub 202a made of a metal material to be chucked by the magneto-optical disc apparatus of this embodiment is provided at one central portion of the magneto-optical disc 202.

The cartridge 203 has a square upper and lower half 204 and a lower half 2 which are of a size large enough to accommodate the magneto-optical disk 202 therein.
The upper half 204 and the lower half 20
5 and 5 are butted and joined together. And
The magneto-optical disk 20 is placed in the cartridge 203.
2 is stored rotatably.

The lower half 205 of the cartridge 203 has a chucking hub 202a provided at the center of the magneto-optical disk 202 and a signal recording surface of the magneto-optical disk 202 housed in the cartridge 203. A first opening 206 is provided to expose the part to the outside along the inner and outer circumferences. The first opening 20
The reference numeral 6 designates the cartridge 20 on one side surface 207 and the other side surface 208 of the cartridge 203 in the substantially central portion in the left-right direction.
3 is formed as a long hole from the front surface portion 209 side to the center portion thereof.

The first opening 206 is a disk of a rotary drive device for rotating the chucking hub 202a of the magneto-optical disk 202 when the disk cartridge 201 is mounted in the magneto-optical disk apparatus. While facing the table, the magneto-optical disk 2
The signal recording surface 02 is exposed to the optical pickup device that irradiates the signal recording surface with a laser beam.

On the other hand, a second opening 216 is formed in the upper half 204 at a position facing the first opening 206 provided in the lower half 205. This second
The opening 216 of the cartridge 203 is the front surface 2 of the cartridge 203.
The magneto-optical disk 2 is provided at a position close to the 09 side.
A part of the other main surface portion of 02 is formed in a rectangular shape with a size large enough to face outward along the inner and outer circumferences in the radial direction. The second opening 216 applies an external magnetic field to the other main surface portion of the magneto-optical disc 202 when the disc cartridge 201 is mounted in the magneto-optical disc device. It is designed to be exposed to a magnetic head.

The front portion 2 of the cartridge 203 is
09 so that the magnetic head and the optical pickup can easily approach the main surface portions of the magneto-optical disk 202 in close proximity to each other in the portions corresponding to the first opening portion 206 and the second opening portion 216. Notch recess 206a for forming
216a is provided respectively. That is, the thickness of the central portion in the vicinity of the front surface portion 209 of the cartridge 203 is such that the first opening portion 206 and the second opening portion 216 are the same.
It is made thin in each part corresponding to. As a result, when the disc cartridge 201 is loaded, the contact of the cartridge 203 with the magnetic head and the optical pickup is avoided, and these are arranged close to the signal recording surface of the magneto-optical disc 202.

A shutter member 211 for opening and closing the first opening 206 and the second opening 216 is slidably attached to the cartridge 203. The shutter member 211 is the first member of the lower half 205.
First shutter plate portion 212 for closing the opening 206 of the
And a second shutter plate portion 213 which is arranged in parallel and opposed to the first shutter plate portion 212 to close the second opening portion 216 of the upper half 204, and the first and second shutters. It is composed of a connecting piece portion 214 that connects the base end sides of the plate portions 212 and 213.

The first shutter plate portion 212 is formed as a narrow and elongated rectangular body sufficient to close the first opening portion 206 of the lower half 205. The front end side of the first shutter plate portion 212 is pressed and supported by a shutter pressing plate 215 attached to the outer surface of the lower half 205, and is prevented from rising from the cartridge 203. On the other hand, the second shutter plate portion 213 is
It is formed as a wide rectangular body large enough to close at least the second opening 216.

Then, the respective shutter plate portions 212, 21
The connecting piece portion 214 for connecting the three is the shutter member 21.
When the optical disc 1 is slid so that the magneto-optical disc 202 is exposed to the outside, the magneto-optical disc 202 is opened.
On the other hand, it is formed to have a thickness substantially equal to the thickness of the cartridge 203 in the central portion, which is thin in order to bring the magnetic head and the optical pickup into close proximity.

Further, the other end of the torsion coil spring whose one end is locked in the cartridge 203 is locked to the connecting piece 214. That is, the torsion coil spring causes the shutter member 211 to move to the first opening 2
06 and the second opening 216 are hung so as to always move and bias in the direction of closing the lid. The connecting piece 21
4 is configured to be in sliding contact with the front surface portion 209 of the cartridge 203, and the shutter member 211
A stable sliding contact operation is performed.

The shutter member 2 thus constructed
Reference numeral 11 denotes a position where the first opening 206 and the second opening 216 are closed, and the openings 206 and 216.
17 can be moved and operated in the direction of arrow X in FIG. And the cartridge 2
When the shutter member 211 is moved by a shutter opening pin provided on a cartridge holder described later, the shutter opening pin is fitted into the front surface portion 209 of No. 03, so that the first opening portion 206 and the first opening portion 206. A shutter opening member fitting portion 224 for opening the second opening 216 is formed.

The shutter opening member fitting portion 224 has the connecting piece portion 2 of the shutter member 211 in a state where the first opening portion 206 and the second opening portion 216 are opened.
It is formed as a substantially U-shaped notch groove at a position where the tip end portion 219 of 14 faces.

Further, the lower half 205 has a cartridge positioning pin which is a cartridge positioning member for positioning the horizontal mounting position of the disc cartridge 201 when the disc cartridge 201 is mounted in the magneto-optical disc device. A pair of cartridge positioning pin engaging holes 225 and 226 are provided to mate with each other.

Further, in the lower half 205, in the vicinity of the one cartridge positioning pin engaging hole 226,
An erroneous erasure prevention member 227 for selecting whether to write an information signal to the magneto-optical disk 202 is provided. Further, a cartridge pull-in pin fitting hole 228 into which the cartridge hold pin provided in the loading mechanism of the magneto-optical disk device is fitted is formed in the front side of the one side surface portion 207 of the cartridge 203. There is.

Next, a magneto-optical disk device for recording and / or reproducing on the magneto-optical disk 202 housed in the disk cartridge 201 having the above-mentioned structure will be described.

[2] Schematic Structure of Magneto-Optical Disk Device In this magneto-optical disk device, a disk cartridge 2 is provided.
01 for pulling 01 to a predetermined mounting position, a disc rotation driving mechanism for rotating the magneto-optical disc 202, and a cartridge positioning for positioning the disc cartridge 201 with respect to the disc cartridge 201 held at the predetermined mounting position. Means and disk rotation drive mechanism for the disk cartridge 201
An elevating mechanism that is moved up and down with respect to the magneto-optical disk 20.
2. An optical system for carrying out recording operation and / or reproducing of an information signal to / from the magneto-optical disk 202 by carrying out a radial transfer operation over the inner and outer circumferences of 2, and an external device when recording an information signal on the magneto-optical disk 202. A mechanism such as a magnetic head device that applies a magnetic field is provided.

[2-a] Disk Rotation Drive Mechanism As shown in FIG. 1, the disk rotation drive mechanism includes a spindle motor 1 which is vertically moved up and down with respect to the disk cartridge 201 by an up-and-down drive means described later. To have.

As shown in FIG. 3, the spindle motor 1 incorporates a rotary drive motor (not shown) in a cylindrical spindle support member 2 whose side facing a chassis (not shown) is open. Is configured. In this spindle support member 2, the annular flat surface 2a opposite to the surface facing the chassis is a disk mounting surface on which the magneto-optical disk 202 housed in the disk cartridge 201 is mounted. ing. Then, in the spindle support member 2, the chucking hub 202a of the magneto-optical disk 202 can be held by a magnetic attraction force in the recess 3 formed as a circular recess at a position lower than the disk mounting surface 2a. A magnet 4 for adsorbing a disk is disposed to achieve the above.

The magnet 4 is formed as a disk having a size large enough to be housed in the recess 3 and has a spindle shaft insertion hole for inserting the spindle shaft 5 in the center thereof. The spindle shaft 5 of the spindle motor 1 is provided at the center of the recess 3 so as to project from the disc mounting surface 2a.

Further, as shown in FIG. 25, the spindle motor 1 together with the spindle support member 2 is provided at the opposite positions on the outer peripheral surface of the spindle support member 2 in the contact / separation direction with respect to the disc cartridge 201. Second constituting a second raising / lowering drive unit described later for raising / lowering drive
A pair of arms 8 and 9 to which the pins 6 and 7 are attached are provided.

The arms 8 and 9 are both provided on the outer peripheral surface of the spindle support member 2 at positions facing each other as rectangular plate-like members. Then, the second pins 6 and 7 constituting a second elevating and lowering drive unit are rotatably attached to the tip ends of the arms 8 and 9 by a second cam described later. These second pins 6 and 7 are
It engages with the second cam and is rotated along the inclined surface of the cam by the operation of moving the second cam.

Further, on these arms 8 and 9, positioning pins 10 and 11 as positioning means for positioning the spindle motor 1 at a raised position to a predetermined height position.
Are provided with positioning pin engagement holes 12 and 13. The positioning pin engagement holes 12 and 13 are provided in order to accurately regulate the height position of the spindle motor 1.
It is formed as a circular through hole processed with high precision. Further, the positioning pins 1 are attached to the arms 8 and 9.
Recesses 16 and 17 with which positioning pin attachment members 14 and 15, which are fixed members to which 0 and 11 are attached, are formed.

Bottom surfaces 16a, 17 of these recesses 16, 17
Reference character a denotes a reference surface that regulates the height position of the spindle motor 1 with high accuracy, and is an extremely smooth and flat surface. Further, tension coil springs 22 and 23 are provided on the arms 8 and 9 for ensuring a contact state between the second cam and the second pins 6 and 7 when the spindle motor 1 is raised.

One end of each of the tension coil springs 22 and 23 is hooked on the chassis, and the other ends thereof are connected to the arms 8 and 9.
It is hung on one end of. Therefore, the spindle motor 1 is always biased toward the chassis by the elastic force of the tension coil springs 22 and 23.

The concave portion 1 functioning as the above-mentioned reference surface.
By providing spacers 20 and 21 which are disk-shaped tilt adjusting means having circular holes 18 and 19 larger than the positioning pin engaging holes 12 and 13 on the bottom surfaces 16a and 17a of 6 and 17, respectively, at the raised position. The inclination of the spindle motor 1 can be adjusted. As a result, so-called skew adjustment can be performed in which the optical axis of the objective lens is adjusted perpendicularly to the signal recording surface of the magneto-optical disk 202.

Normally, in adjusting the optical axis of the objective lens, it is necessary to provide an adjusting mechanism in the optical pickup device and tilt the entire drive mechanism (actuator) for adjustment. However, in this example, since the inclination of the spindle motor 1 is adjusted by interposing the spacers 20 and 21, it is possible to eliminate the need for an optical axis adjusting mechanism of a large objective lens having a complicated structure. Further, in this example, the skew adjustment can be easily performed only by interposing the spacers 20 and 21 as compared with the difficult work of the conventional method of adjusting the skew on the actuator including the objective lens.

On the other hand, positioning pin attachment members 14 and 15 provided with positioning pins 10 and 11 for regulating the height position of the spindle motor 1 are fixed on the chassis. The positioning pin attachment members 14 and 15 are
As shown in FIG. 26, the side surface is formed as a block having a substantially L shape, the base end portions 14 a and 15 a thereof are fixed to the chassis, and the tip end portions 14 b and 15 b are provided on the arms 8 and 9. The concave portions 16 and 17 are provided so as to face the concave portions.

The positioning pin engaging hole 1 is formed in the tip portions 14b and 15b of the positioning pin attaching members 14 and 15, respectively.
Positioning pins 10 and 11 that engage with 2 and 13 are embedded. The positioning pins 10 and 11 have conical tips 10a and 11a so that they can be smoothly engaged with the positioning pin engagement holes 12 and 13, and the base ends 10b and 11b are the positioning pins. It has a cylindrical shape so that it can be securely fixed to the mounting members 14 and 15.

The positioning pins 10 and 11 are provided with
Between the tip portions 10a, 11a and the base end portions 10b, 11b, there are provided disc-shaped flange portions 10c, 11c which come into contact with the reference surfaces 16a, 17a of the opening peripheral portions of the positioning pin engaging holes 12, 13. Has been. The flange portions 10c and 11c function as stoppers that positionally regulate the rising position of the spindle motor 1.

[2-b] Structure of Lifting Mechanism The lifting mechanism is a disk cartridge 20 held at a predetermined mounting position by a disk loading mechanism described later.
The cartridge positioning means for positioning the disk cartridge 201 with respect to the disk 1 and the disk rotation drive mechanism are moved up and down in the contact and separation direction with respect to the disk cartridge 201.

As shown in FIG. 3, such an elevating mechanism has guide shafts 24, 25, 2 fixed to predetermined positions of the chassis.
It has a slide member 28 that is moved and operated on the chassis while being guided by 6, 27. The slide member 28
Is composed of a pair of slide pieces 29, 30 provided on both sides of the spindle motor 1 so as to be parallel to each other, and a connecting piece 31 for connecting the tip portions of the slide pieces 29, 30.

The slide pieces 29, 30 are provided with guide shaft slide grooves 32, 33, 34, 35 each having a long hole shape at positions corresponding to the guide shafts 24, 25, 26, 27 fixed to the chassis. Has been formed. Further, as shown in FIG. 8, the slide pieces 29, 30 are engaged with the second pins 6, 7 to drive the spindle motor 1 up and down in the contact and separation directions with respect to the disk cartridge 201. Cams 36 and 37 are provided.

These second cams 36, 37 are the same as the second cams described above.
Fan-shaped lifting and lowering operation pieces 38, which engage with the pins 6 and 7 of
39 and locking pieces 40 and 41 that are locked to the slide pieces 29 and 30 and are rotatably mounted around support shafts 42 and 43 fixed to the chassis.

As shown in FIGS. 9 and 10, cam grooves 44 and 45 for engaging the second pins 6 and 7 are formed in the elevating operation pieces 38 and 39. The cam groove 44,
Reference numeral 45 denotes inclined portions 44a, 45a inclined at a predetermined inclination angle with respect to the chassis, and a parallel portion 44 parallel to the chassis.
b and 45b.

The inclined portions 44a and 45a correspond to portions that serve to raise the spindle motor 1, and the parallel portions 44b and 45b correspond to portions that serve to serve the spindle motor 1 at the maximum height position. On the other hand, the locking piece 40,
Reference numeral 41 functions as a connecting member for rotating the second cams 36 and 37 in synchronism with the movement of the slide member 28, and is an engagement formed as a long hole formed in the slide pieces 29 and 30. Engaging pins 48, 4 facing the holes 46, 47
Have nine.

Further, as shown in FIG. 9, a slide plate return spring 52 for sliding the slide member 28 from the unloading position to the loading position is attached to the rear end edge of the one slide piece 30. A hook portion 53 is provided. Further, the loading motor 54 is provided at the rear edge of the one slide piece 30.
Is provided with a plate retracting piece 55 for forcibly retracting the slide member 28 from the loading position to the unloading position against the biasing force of the slide plate returning spring 52.

The plate retracting piece 55 is adapted to engage with a cylindrical engaging pin 57 provided on a transmission gear 56 for transmitting the rotation of the loading motor 54. That is, the transmission gear 56 is rotated by the rotation of the loading motor 54, and the transmission gear 5 is rotated.
The engaging pin 57 set up in 6 engages with the plate pulling back piece 55 to pull back the slide member 28 from the loading position to the unloading position.

Then, when the slide member 28 is set to the unloading position by the loading motor 54, as shown in FIG. 8, the trigger arm mounted rotatably about the support shaft 58 planted in the chassis. The locking claw 59a of 59 is adapted to engage with a slide member locking pin 60 provided at the rear end edge of the other slide piece 29 to hold the unloading state of the slide member 28.

The trigger arm 59 is always provided with the locking claw 59a by means of a torsion coil spring 62 hung over the support shaft 58 and a trigger arm pin 61 which is erected on the trigger arm 59. The slide member locking pin 60 is elastically urged in a direction in which it engages.

On the other hand, the connecting piece 31 is provided with first cams 50 and 51 constituting a first elevating and lowering drive section for elevating and lowering a cartridge positioning means for positioning a disk cartridge 201 which will be described later. As shown in FIGS. 9 and 10, the first cams 50 and 51 include inclined portions 50a and 5 that are inclined with respect to the chassis at a predetermined inclination angle.
1a and parallel portions 50b and 51b parallel to the chassis.

The inclined portions 50a and 51a correspond to portions that serve to raise the spindle motor 1, and the parallel portions 50b and 51b correspond to portions that serve to make the spindle motor 1 the maximum height position. And, in particular, the inclination angles of the inclined portions 50a, 51a of the first cams 50, 51 are set so that the cartridge positioning means is moved ahead of the spindle motor 1 to raise the inclination angle of the second cams 36, 37. It is made larger than the inclination angle of the portions 44a and 45a.

The cartridge positioning means, which is driven up and down by the first cams 50 and 51, engages with the cartridge positioning pin engagement holes 225 and 226 provided in the disk cartridge 201 to mount the disk cartridge 201 in the horizontal direction. It has cartridge positioning pins 63 and 64 for positioning.

Such cartridge positioning pins 63, 6
4 are embedded in the cartridge positioning pin elevating block 65 provided on the chassis at positions facing the cartridge positioning pin engaging holes 225 and 226, respectively. As shown in FIGS. 9 and 10, the cartridge positioning pins 63, 64 have conical tip portions 63a, 64a for smoothly engaging with the cartridge positioning pin engagement holes 225, 226. The base end portions 63b and 64b are cylindrical so that they can be securely fixed to the cartridge positioning pin elevating block 65.

Further, the cartridge positioning pin 6
3 and 64 have the distal end portions 63a and 64a and the proximal end portion 63, respectively.
Between the b and 64b, disk-shaped flange portions 63c and 64c are provided which come into contact with the opening peripheral portions of the cartridge positioning pin engagement holes 225 and 226 and function as stoppers.

Then, the cartridge positioning pin 6
The cartridge positioning pin elevating block 65 provided with 3, 64 has rotatably provided first pins 66, 67 which come into contact with the first cams 50, 51 provided on the previous slide member 28. .

The first pins 66 and 67 are the same as the first pins.
Of the first cams 50, 51
Of the cam 50, 51 by the moving operation of the
It is adapted to rotate along a and 51a. Also,
In this cartridge positioning pin lifting block 65,
A temperature sensor 68 and a write protect switch 69 for detecting the position of the erroneous erasure prevention member 227 provided on the disk cartridge 201 are provided.

The temperature sensor 68 is provided at a position close to one cartridge positioning pin 63, and the write protect switch 69 is provided at a position close to the other cartridge positioning pin 64.

Then, the cartridge positioning pin 6
3, 64, a temperature sensor 68, and a write protect switch 69 are provided on the cartridge positioning pin lifting block 65. The cartridge positioning pin lifting block 65 is moved toward and away from the disk cartridge 201 along a pair of lifting guide pins 70 and 71 that are erected on the chassis. It is designed to be driven up and down. In other words, the first pin 66, 67 is engaged with the first cam 50, 51 by the movement operation of the slide member 28, whereby the cartridge positioning pin elevating block 65.
Is driven up and down with respect to the disc cartridge 201 in the contact and separation directions.

[2-c] Configuration of Optical System and Magnetic Head Device The optical system is an objective lens 72 for converging and emitting a laser beam on the signal recording surface of the magneto-optical disk 202 rotated by the spindle motor 1. And an optical pickup device 73 having

Such an optical pickup device 73 is shown in FIG.
As shown in FIG. 5, the carriage 74 is provided on a carriage 74 that is radially movable over the inner and outer circumferences of the magneto-optical disk 202, and the objective lens 72 is opposed to the signal recording surface of the magneto-optical disk 202 in the radial direction. It is designed to be sent to.

On the other hand, as shown in FIG. 3, the magnetic head device has a magnetic head 75 having a magnetic field generating coil for applying an external magnetic field of a predetermined intensity to the signal recording surface of the magneto-optical disk 202. Become. The magnetic head 75 is attached to the front end of a head support arm 76 having a base end fixed to the carriage 15 so as to be provided at a position facing the objective lens 72 with the magneto-optical disk 202 interposed therebetween. . Therefore, the optical pickup device 73
Is sent in the radial direction of the magneto-optical disk 202, the magneto-optical disk 202 is kept in synchronization with this while the magnetic head 75 maintains the attitude facing the objective lens 72.
The transfer operation is performed in the radial direction over the inner and outer peripheries.

[2-d] Configuration of Disc Loading Mechanism As shown in FIG. 2, the disc loading mechanism includes a cartridge holder 77 having an auto-injection mechanism for automatically retracting the disc cartridge 201 to a predetermined mounting position. To have. The cartridge holder 77
Is a cartridge insertion / removal opening 7 that functions as an insertion opening for the disk cartridge 201 that is provided penetrating in the front-rear direction.
8 is formed as a flat housing having a rectangular cross section.

A plurality of insertion guide pieces 79 and 80 are provided near the corners of the cartridge insertion / removal opening 78 in order to facilitate the insertion of the disc cartridge 201 into the cartridge holder 77. Has been.

The auto-injection mechanism provided in the cartridge holder 77 is used for the disc cartridge 20.
A first inject plate 81 slidable in the insertion / removal direction of the first injecting plate 8 and the first inject plate 8
The second injector plate 82, which is inserted into the cartridge retracting pin insertion hole 228 of the disc cartridge 201 by the movement of 1 to retract the disc cartridge 201, and the first injector plate 81 are forcedly moved to the depth of the cartridge holder 77. And a third injector plate 83 that slides in the direction.

The first injector plate 81 is
The lower plate portion 84 of the cartridge holder 77 is provided at a position facing the other slide piece 29 provided with the slide member locking pin 60. The first injector plate 81 is used for the cartridge holder 7
A pair of guide shafts 85, 86 to be planted on the lower plate portion 84 of
2 and the disc cartridge 201 is inserted into the cartridge holder 77 so that the disc cartridge 201 can be moved forward and backward as indicated by an arrow A in FIG.

That is, at the positions corresponding to the guide shafts 85, 86 of the first injector plate 81, the forward / backward operation guide grooves 87, which are elongated holes formed along the inserting direction of the disc cartridge 201, are formed. 88 is provided, and each of the guide shafts 8 is provided in these advancing / retreating operation guide grooves 87, 88.
5, 86 are inserted and engaged, and the first injector plate 81 can be moved forward and backward.

The first inject plate 81 is provided with a notch 90 that engages with an inject plate operating pin 89 provided on a third inject plate 83, which will be described later. The notch 90
Is provided on the front end side extending to the cartridge insertion / removal opening 78, and is formed as a substantially U-shaped groove having one opening that is large enough to face the above-mentioned injector plate operating pin 89. Further, in the depth direction of the first injector plate 81, the cartridge holder 77
There is provided a cartridge contact portion 91 for abutting the shutter member 211 of the disc cartridge 201 to be inserted therein.

The cartridge contact portion 91 is a plate-like member formed by bending so as to face the inside of the cartridge holder 77 from a notch (not shown) cut in the lower plate 84 of the cartridge holder 77. Consists of. Further, a trigger arm rotating operation piece 92 that comes into contact with the trigger arm pin 61 provided on the trigger arm pin 61 is provided at the rear end edge portion of the first injector plate 81 in the depth direction.

On the other hand, the second injector plate 82
Is attached so as to be rotatable in the direction shown by arrow B in FIG. 3 with respect to the rotating shaft 93 that is planted on the rear end side of the first injector plate 81. Then, the cartridge insertion / removal opening 7 is attached to the second injection plate 82.
The cartridge hold pin 94 that engages with the cartridge pull-in pin fitting hole 228 of the disc cartridge 201 that is inserted into the cartridge holder 77 from No. 8
Has been planted.

The cartridge hold pin 94 is
When the disc cartridge 201 is in a state before being inserted into the cartridge holder 77, it is located outside the cartridge holder 77. Then, when the disc cartridge 201 is inserted into the cartridge holder 77 and the cartridge pull-in pin fitting hole 228 and the cartridge hold pin 94 are located at positions opposite to each other, the second injector plate 82 is rotated and this insert plate 82 is rotated. The cartridge hold pin 94 set up on the eject plate 82 is adapted to be inserted into the cartridge pull-in pin fitting hole 228.

That is, the cartridge hold pin 94 is located outside the cartridge holder 77 in the second injector plate 82 in the unloading state, and the disc cartridge 201 is inserted into the cartridge holder 77 and the disc cartridge 201 is inserted. When the cartridge pull-in pin fitting hole 228 provided in 201 and the cartridge hold pin 94 face each other, the second injector plate 82 rotates to pull the cartridge hold pin 94 into the cartridge pull-in. A cam groove 95 is formed so as to be inserted into the pin fitting hole 228. Then, in the cam groove 95, the first injector plate 8 is provided.
The guide shaft 86 that is set up on the cartridge holder 77, which faces the advancing / retreating operation guide groove 88 provided on the rear side of 1, is inserted and engaged.

The third injector plate 83 is
The first injector plate 81 is forcibly slid in the depth direction of the cartridge holder 77, and the lower plate portion 84 of the cartridge holder 77 is arranged in a direction substantially orthogonal to the insertion direction of the disc cartridge 201.
Further, it is rotatable about the support shaft 96. Then, at one end edge portion of the third injector plate 83, an injector plate operation pin 89 that engages with the cutout portion 90 provided in the first injector plate 81 is planted.

Also, the third injector plate 8
At the other end edge portion of 3, the inject plate holding pin 98 that comes into contact with the inject plate holding piece 97 that is formed by bending toward the holder 77 at the tip side of one slide piece 30 of the slide member 28 is planted. ing. And
The third injector plate 83 is stretched over the spring hooking portion 99 formed by cutting and raising the cartridge holder 77 and the spring hooking portion 100 formed on the third injector plate 83. The coil spring 101 is constantly biased to rotate in the direction of arrow C in FIG.

Further, the cartridge holder 77 has
A shutter opening device for automatically opening the shutter member 211 of the disc cartridge 201 inserted into the cartridge holder 77 through the cartridge insertion / removal opening 78 is provided. Such a shutter opening device is a shutter serving as a support member provided with a cam groove portion 103 formed mainly on the upper plate portion 102 of the cartridge holder 77 and a shutter opening pin 104 that is a shutter opening member that moves to face the cam groove portion 103. It is composed of an open pin support member 105.

The cam groove 103 is inserted into the cartridge holder 77, and the disc cartridge 201 is inserted.
The shutter member 211 of the disc cartridge 2
It is formed so as to draw a locus that opens in conjunction with the insertion operation of 01. That is, the cam groove portion 103
As shown in FIG. 4, a slanted portion 103a formed on the start end side slantingly slanted with respect to the insertion direction of the disc cartridge 201 (the direction indicated by the arrow D in the figure) and the slanted portion 103a are continuous. And an arcuate portion 103b that forms an arc, and a linear portion 103c that is provided continuously to the arcuate portion 103b and that is provided on the rear end side that is substantially parallel to the insertion direction of the disc cartridge 201.

The inclined portion 103a of the cam groove portion 103 is
It plays the role of generating a component force for opening the shutter member 211 of the disc cartridge 201 inserted into the cartridge holder 77 through the cartridge insertion / removal port 78. The inclination angle θ of the inclined portion 103a is determined by inserting the disc cartridge 201 into the shutter opening pin 1.
In order to generate a component force to rotate 04, at least 2 in the insertion direction of the disc cartridge 201.
It is necessary to have an angle of 5 degrees or more.

The arcuate portion 103b provided continuously with the straight portion 103a serves to minimize the movement locus of the shutter opening pin support member 105. If such a portion is a straight line, the movement locus of the shutter opening pin support member 105 becomes large, and the rear end portion 105a of the shutter opening pin support member 105 bulges outward more than the cartridge holder 77 and rotates. However, there is a risk of contact with other members provided outside the cartridge holder 77.

However, as in this example, the cam groove portion 1
By making 03 a circular arc shape, the movement locus of the shutter opening pin supporting member 105 becomes small, and the protrusion of the rear end edge portion 105a of the shutter opening pin supporting member 105 from the cartridge holder 77 is suppressed as much as possible.
As a result, other members provided on the outside of the cartridge holder 77 can be provided at a position close to the cartridge holder 77, and the magneto-optical disk device can be downsized.

On the other hand, the linear portion 103c provided continuously with the arcuate portion 103b functions to move the disc cartridge 201 to the rear end portion of the cartridge holder 77 with the shutter member 211 being fully opened. By moving the disk cartridge 201 to the rear end of the cartridge holder 77 with the shutter member 211 opened, it is possible to avoid the contact between the magnetic head 75 and the optical pickup device 73 and the disk cartridge 201. A mechanism for moving the magnetic head 75 up and down can be omitted.

The shutter opening pin support member 105 is
Each of the front end portion 105b and the rear end portion 105a is formed as a plate-like body having a substantially rectangular shape in an arc shape, and the front end portion 105b has a shutter opening pin 104 facing the cam groove portion 103. The shutter opening pin 104 is formed as a columnar pin and hangs in the cartridge holder 77 via the cam groove 103.

Further, this shutter opening pin support member 10
5, a slide groove 106 having an elongated hole shape is formed from the rear end portion 105a to substantially the central portion. A moving guide pin 108, which is an engaged portion that is movable along a guide portion 107 formed on the cartridge holder 77, engages with the slide groove 106. The guide portion 107 has the cam groove portion 103.
It is formed as a groove having an elongated hole shape provided in parallel with the straight portion 103c, and the moving guide pin 108 is movably faced.

On the other hand, the moving guide pin 108 has a disk-shaped flange provided at the upper and lower ends of a columnar pin having a size large enough to move toward the guide portion 107.

The shutter opening pin support member 105 having the above-described structure is provided with the tension coil spring 109.
The shutter opening pin 10 indicated by the arrow E in FIG.
4 is always urged in the direction to position the cam 4 on the starting end side of the cam groove 103. That is, the tension coil spring 1
09, one end of the shutter opening pin support member 105
The shutter opening pin 104 is locked by the spring locking piece 110 provided in the above, and the other end is locked by the spring locking piece 111 formed by cutting and raising the upper plate portion 102 of the cartridge holder 77. The cam groove portion 103 is positioned at the starting position, that is, the initial position of the inclined portion 103a.

Further, the disc cartridge 201 to be inserted into the cartridge holder 77 is regulated in the upper body portion 102 of the cartridge holder 77 so as not to be inserted further inward than the loading position which is a predetermined mounting position. A cartridge insertion position regulating member 112 for forming the cartridge is formed.

This cartridge insertion position regulating member 112
Is provided so as to project further rearward than the rear end edge of the upper plate portion 102, and the front end portion thereof is the cartridge holder 77.
Is bent so as to hang inward. Further, the cartridge holder 77 has a cutout 11 facing the magnetic head 75 and the optical pickup device 73.
3 is provided.

[3] Description of Disc Cartridge Mounting Operation The operation of mounting the above-mentioned disc cartridge in the magneto-optical disc device configured as described above will be described. First, the disc cartridge 201 is inserted into the inside of the cartridge holder 77 through the cartridge insertion / removal opening 78 in the proper orientation. Then, as shown in FIG. 4, the shutter opening pin 104 held at the initial position contacts the front surface portion 209 of the disc cartridge 201.

When the disc cartridge 201 is further inserted in the cartridge holder 77 from this state, a component force is generated on the shutter opening pin 104 by being pushed by the disc cartridge 201, and the shutter opening pin 104 is pushed by the shutter opening pin 104. Inclined portion 10 of cam groove 103
It is moved along 3a.

That is, when the disc cartridge 201 is pushed inward of the cartridge holder 77, the shutter opening pin support member 105 resists the urging force of the tension coil spring 109 hung across the cartridge holder 77. , Is rotated about a moving guide pin 108 at an initial position which is one end side of a guide portion 107 provided on the cartridge holder 77, and a shutter opening pin 104 provided at a tip portion 105b thereof is moved to a linear portion 103a of a cam groove portion 103. Move along.

As a result, the shutter member 211 resists the biasing force of the torsion coil spring built in the cartridge 203 and opens the openings 206 and 216 of the disc cartridge 201 indicated by the arrow F in FIG. Is moved in the direction.

Further, when the disc cartridge 201 is inserted inward of the cartridge holder 77, the shutter opening pin 104 moves along the arcuate portion 103b of the cam groove portion 103 to further move the shutter member 211. When the shutter opening pin 104 moves along the arcuate portion 103b, the shutter opening pin support member 105 is at the initial position as when the shutter opening pin 104 moves along the inclined portion 103a. It will rotate around the movement guide pin 108.

That is, from the inclined portion 103a to the arcuate portion 10
In the range in which the shutter opening pin 104 moves over 3b, the slide groove 10 is formed in the shutter opening pin support member 105.
Since 6 is formed, the movement guide pin 108 is in the initial position. Therefore, the inclined portion 103
In the range from "a" to the arcuate portion 103b, the movement locus of the shutter opening pin support member 105 becomes extremely small, and the rear end portion 105a is located at the disc cartridge 2
It is designed so that it hardly jumps out from 01.

When the shutter opening pin 104 reaches the rear end edge of the arcuate portion 103b, the shutter opening pin 104 is moved to the cartridge 203 as shown in FIG.
The shutter opening member fitting portion 224 provided in the. As a result, the opening 2 of the disc cartridge 201
06 and 216 are fully opened, and the magneto-optical disk 202 housed in the cartridge 203 is exposed.

Further, the disc cartridge 201
When is inserted inward of the cartridge holder 77, the movement guide pin 108 abuts on the front surface portion 209 of the cartridge 203 this time. When the disc cartridge 201 further moves inward of the cartridge holder 77, the shutter opening pin support member 105 together with the disc cartridge 201 is moved along the guide portion 107 while maintaining the state of FIG. .

Then, in the middle thereof, the disc cartridge 201 contacts the cartridge contact portion 91 of the first injector plate 81 slidably provided on the cartridge holder 77, as shown in FIGS. Contact. When the disc cartridge 201 is further inserted inward from this state, the first injection plate 81 together with the disc cartridge 201 is moved along the guide shafts 85 and 86 fixed to the cartridge holder 77 in FIG. It slides in the insertion direction of the disc cartridge 201 indicated by the arrow G.

At this time, the second injector plate 82 is moved together with the first injector plate 81 in the insertion direction of the disc cartridge 201 as the first injector plate 81 slides. The second injector plate 82
The second injector plate 82 rotates in the direction of arrow H in FIG. 8 along the cam groove 95 provided on the.

As a result, the cartridge hold pin 94 provided on the second injector plate 82 is
As shown in FIGS. 11 to 13, a cartridge pull-in pin fitting hole 228 of the disc cartridge 201 is provided.
Get in.

Further, when the disc cartridge 201 is inserted inward of the cartridge holder 77, the trigger arm turning operation piece 92 provided on the rear edge of the first injector plate 81 is It contacts the trigger arm pin 61 of the trigger arm 59 rotatably mounted on the chassis. Then, as the first injector plate 81 further moves to the rear end side, the trigger arm 59 rotates about the support shaft 58 in the arrow J direction in FIG. The engagement with the slide member locking pin 60 fixed to is released.

As a result, the slide member 28 is guided by the guide shafts 24, 25, 26, 27 fixed to the chassis by the slide plate return spring 52 stretched over the cartridge holder 77 as shown in FIG.
Start sliding on the chassis toward the cartridge insertion / removal port 78 side indicated by the middle arrow K.

Then, the injector plate holding piece 97 provided on the slide member 28 and the injector plate holding pin 9 of the third injector plate 83.
8, the tension coil spring 101 which has been disengaged and is stretched between the cartridge holder 77 and the cartridge holder 77.
Thus, the third injector plate 83 is forcibly rotated about the support shaft 96 in the direction of arrow L in FIG. Then, when the third injector plate 83 is rotated, the injector plate operation pin 89 planted on the tip side of the third injector plate 83 is moved to the first injector plate 81.
Is indicated by an arrow M in FIG.
Slide it in the inserting direction.

As a result, at this point in time, the cartridge hold pin 9 of the second injector plate 82 has already been
Since 4 is inserted in the cartridge pull-in pin fitting hole 228 of the disc cartridge 201, the disc cartridge 201 is automatically pulled in the depth direction of the cartridge holder 77. Then, finally, the disc cartridge 20 is inserted into the cartridge insertion position regulating member 112 provided in the cartridge holder 77.
The first shutter member 211 contacts and the mounting position of the disc cartridge 201 is determined.

Also, by sliding the slide member 28 toward the cartridge insertion / ejection port 78 side, the engagement pins 48 facing the engagement holes 46, 47 provided in the slide pieces 29, 30 of the slide member 28, The second cams 36 and 37 having 49 at one end are rotated about the support shafts 42 and 43 in the directions of arrows N and O in FIG. 14, respectively. At the same time, the first cams 50, 51 provided on the slide pieces 29, 30 are moved to the cartridge insertion / ejection port 78 side.

Further, when the slide member 28 is slid toward the cartridge insertion / removal port 78 side,
The second cams 36 and 37 contact the second pins 6 and 7 provided on the spindle support member 2 that supports the spindle motor 1, and the first pins 66 provided on the cartridge positioning pin elevating block 65, The first cams 50, 51 contact 67. Then, the slide member 2
The second pins 6 and 7 ascend while rotating on the inclined portions 44a and 45a of the second cams 36 and 37 with the movement of the second cam 36 and the inclined portions 50 of the first cams 50 and 51.
The first pins 66 and 67 ascend while rotating on a and 51a.

At this time, the inclination angles of the inclined portions 50a and 51a of the first cams 50 and 51 are set so that the second cam 3 has the same inclination angle.
Since the inclination angles of the inclined portions 44a and 45a of the cams 6, 37 are large, the first pins 66 and 67 are faster than the second pins 6 and 7, and the first cam 50 is , 5
The first parallel portion 50b, 51b is reached. As a result, the cartridge positioning pin raising / lowering block 65 is raised before the spindle motor 1, and the cartridge positioning pins 63, 64 provided in the cartridge positioning pin raising / lowering block 65 cause the cartridge positioning of the disc cartridge 201 to be performed. Pin engagement hole 2
25, 226, and the disk cartridge 20
Position 1.

Then, the second pins 6 and 7 reach the parallel portions 44b and 45b of the second cams 36 and 37, the spindle motor 1 is raised, and the light stored in the disc cartridge 201 is received. The spindle shaft 5 enters the chucking hub 202a of the magnetic disk 202.
Therefore, the magneto-optical disk 202 can be chucked accurately.

The ejector drives the loading motor 54 to drive the loading motor 5
The engaging pin 57, which is erected on the transmission gear 56 that transmits the rotation of 4, engages with the plate pulling back piece 55 provided on the slide member 28 to move the slide member 28 from the loading position to the unloading position. And pulls back against the biasing force of the slide plate return spring 52.

As a result, the operation exactly opposite to the previous loading operation is performed, the spindle motor 1 is lowered to the chassis side ahead of the cartridge positioning pin elevating block 65, and the slide member 28 is also moved.
In accordance with the sliding motion of the third inject plate 8
3 is rotated, the first inject plate 81 connected thereto is forcibly slid to the unloading state, and finally the disc cartridge 2
01 is forcibly ejected from the cartridge holder 77.

[4] Other Embodiments [4-a] Modification 1 of Second Cam As the second cam for moving the spindle motor 1 up and down,
In addition to the above, a cam having the same configuration as the first cams 50 and 51 for moving up and down the cartridge positioning pin elevating block 65 as shown in FIGS. 19 to 24 can be adopted.

As shown in FIG. 23, each of the second cams 114 and 115 has an inclined portion 115a inclined with respect to the chassis and a parallel portion 115b parallel to the chassis. It is provided integrally with the slide member 28 that faces 6 and 7. In particular, the inclination angle of the inclined portion 115a of the second cam 115 is higher than the inclination angle of the inclined portion 51a of the first cam 51 because the cartridge positioning pin elevating block 65 is raised before the spindle motor 1. Is also made small.

As a result, when the slide member 28 is slid toward the cartridge insertion / ejection port 78 side, as shown in FIG.
As shown in FIG. 4, the first pin 67 climbs up the inclined portion 115a faster than the second pin 7, and the cartridge positioning pin elevating block 65 rises before the spindle motor 1 rises. Therefore, as in the previous embodiment, the spindle shaft 5 of the spindle motor 1 easily enters the chucking hub 202a of the magneto-optical disk 202, and accurate chucking is performed.

Further, by providing the second cams 114 and 115 with slits 118 as shown in FIG. 23,
Elasticity is imparted to the parallel portion 115b, and the spindle support member 2 is moved to the positioning pin 1 by the elastic force.
It may be pressed against 0 and 11. With this configuration, the arms 8 and 9 provided on the spindle support member 2
Bottom surfaces 16a and 17a of the concave portions 16 and 17 (corresponding to the reference surface that regulates the height position of the spindle motor 1) are embedded in positioning pin mounting members 14 and 15 fixed to the chassis as shown in FIG. Positioning pin 1
The spindle motor 1 is fixed by being pressed against 0 and 11.

As a result, the spindle motor 1 is securely fixed at the predetermined height position, and the magneto-optical disk 20 rotated by the spindle motor 1 is operated.
With respect to 2, stable recording / reproduction of the information signal is performed. Further, since the slits 118 are provided in the second pins 114 and 115, the spindle motor 1 can be mounted on the positioning pin 1.
The area for pressing 0, 11 is unnecessary.

If the cam 115 is formed of a spring material having high elasticity, a larger elastic force can be obtained and the spindle motor 1 can be fixed more securely.

[4-b] Second Modified Example 2 of Second Cam Further, as the second cam 116, as shown in FIG. 27, one having the same shape as the first cams 50 and 51 is shown. A cam may be used. When the second cam 116 has the same shape as the first cams 50 and 51, in order to raise the cartridge positioning pin elevating block 65 prior to the spindle motor 1, the first pin 67 and the second pin It is necessary to shift the timing at which each of the first cam 51 and the second cam 116 contacts the pin 7 of FIG.

For example, the first cam 51 is attached to the first pin 67.
The first cam 67 contacts the second pin 6 and the second cam 116 for the first time when the first pin 67 ascends and the first pin 67 climbs up to the middle of the inclined portion 51a of the first cam 51. By doing so, the spindle motor 1 is raised after the cartridge positioning pin raising / lowering block 65 is raised first, and an accurate chucking operation can be performed.

[4-c] Modification 3 of Second Cam Further, as shown in FIGS. 28 to 30, the second cam is formed on the spindle support member 118 for supporting the spindle motor 1. Good. That is, the spindle support member 118 that supports the spindle motor 1 is formed in a rectangular parallelepiped shape, and a cam groove 119 having an inclined portion 119a inclined to the chassis and a parallel portion 119b parallel to the chassis is formed on the side surface thereof.

At this time, the inclined portion 119a has an inclination angle of the inclined portions 50a, 51a of the first cams 50, 51 in order to raise the cartridge positioning pin elevating block 65 ahead of the spindle motor 1. Smaller than. On the other hand, the second pins 120 and 121 that engage with the cam groove 119 are provided on the support pieces 122 and 123 formed upright on the slide member 28.

With such a structure, as in the above-described embodiment, the spindle motor 1 is engaged by the engagement of the pin and the cam.
The cartridge positioning pin elevating block 65 can be raised prior to the rising of the magneto-optical disk 202.
It is possible to perform an accurate chucking operation of.

[4-d] Modified Example of Shutter Release Pin Position In the above example, the center position of the shutter release pin 104 is located in the cartridge holder 77 before the disc cartridge 210 is inserted into the cartridge holder 77. The center of the shutter opening pin 104 coincides with the center of the formed guide portion 107 in the width direction, that is, on the center line of the guide portion 107 in the width direction. In this case, if each component is formed with high precision and assembled with high precision, the shutter member 2 can be smoothly moved.
11 can be opened.

However, depending on the dimensional accuracy and assembly accuracy of each component, as shown in FIG. 32, the center of the shutter opening pin 104 is opposite to the center of the guide portion 107 in the width direction on the side opposite to the opening direction of the shutter member 211. It is shifted in (right side in the figure) and (the shift amount to W _1.), insert the disc cartridge 210 into the cartridge holder 77, even if to open the shutter member 211, the shutter opening pin support member 105 Fig. Since it tries to move in the direction of the middle arrow α, the shutter member 211 cannot be opened.

Therefore, as shown in FIG. 31, in the state before the disc cartridge 210 contacts the shutter opening pin 104, the central position of the shutter opening pin 104 is the guide portion 107 formed on the cartridge holder 77. The shutter opening side should be offset with respect to the center in the width direction.

That is, the center position T ₂ of the shutter opening pin 104 is displaced with respect to the center line T ₁ in the width direction of the guide portion 107 by a distance W on the left side in the X coordinate in the drawing. The deviation amount W may be a value that causes deviation at least on the shutter opening side in consideration of dimensional accuracy and assembly accuracy of parts.

When the disk cartridge 210 is inserted into the cartridge holder 77 with such a structure, the shutter opening pin support member 1 is inserted with the insertion of the disk cartridge 210 regardless of the dimensional accuracy and assembly accuracy of each component.
05 smoothly moves the guide portion 107 to open the shutter member 211.

In the above example, the shutter member 211
Although the opening and closing of the shutter is performed on the right side with respect to the center of the disc, when the shutter opening pin 104 is also performed on the left side.
If the center position of the is shifted to the shutter opening side with respect to the center of the guide portion 107 in the width direction, the same operational effect can be obtained.

[0140]

As is apparent from the above description, in the shutter opening device according to the present invention, the movement path of the shutter opening pin support member for opening the shutter member of the disk cartridge can be made extremely small. . Therefore, it is possible to avoid contact with other members or the like provided on the outside of the cartridge holder, and it is possible to arrange other components in the vicinity of the cartridge holder, and to reduce the size and thickness of the apparatus itself. be able to.

Further, in the shutter opening device according to the present invention, the inclined portion of the cam groove portion at the initial position causes the opening member for opening the shutter member to generate a component force for rotating the opening member, so that the shutter member is opened. Moves along the cam groove, and the shutter member can be surely opened.

Further, in the shutter opening device according to the present invention, since the central position of the shutter opening pin is shifted to the shutter opening side with respect to the center in the width direction of the guide portion formed on the cartridge holder, each part is separated. The shutter member can be smoothly opened by the shutter opening pin by inserting the disc cartridge regardless of the dimensional accuracy and the assembly accuracy.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an entire magneto-optical disk device.

FIG. 2 is a perspective view of a cartridge holder.

FIG. 3 is a perspective view of a lifting mechanism that drives a cartridge positioning unit and a disk rotation driving mechanism up and down.

FIG. 4 is a plan view showing an engaged state of the shutter opening pin and the disc cartridge when the disc cartridge is mounted on the cartridge holder.

FIG. 5 is a plan view showing a state in which the shutter member starts to be opened by the shutter opening pin in the mounted state of the disc cartridge to the cartridge holder.

FIG. 6 is a plan view showing a state in which a shutter member is opened by a shutter opening pin when the disc cartridge is mounted on the cartridge holder.

FIG. 7 is a plan view showing a state where a shutter member is fully opened by a shutter opening pin in a mounted state of a disc cartridge with respect to a cartridge holder.

FIG. 8 is a plan view showing an operating state of the lifting mechanism in the unloading state.

FIG. 9 is a right side view of the lifting mechanism in the unloading state.

FIG. 10 is a left side view of the lifting mechanism in the unloading state.

FIG. 11 is a plan view of the elevating mechanism when the slide member starts to slide.

FIG. 12 is a right side view of the elevating mechanism when the slide member starts to slide.

FIG. 13 is a left side view of the elevating mechanism when the slide member starts to slide.

FIG. 14 is a plan view showing an operating state of the lifting mechanism in the loading state.

FIG. 15 is a right side view showing the operating state of the lifting mechanism in the loading state.

FIG. 16 is a left side view showing the operating state of the lifting mechanism in the loading state.

FIG. 17 is a perspective view of the disc cartridge as viewed from the upper half side.

FIG. 18 is a perspective view of the disc cartridge as viewed from the lower half side.

FIG. 19 is a perspective view of an elevating mechanism in which a second cam of Modification 1 is provided on a slide member.

FIG. 20 is a plan view of an elevating mechanism in which a second cam of Modification 1 is provided on a slide member.

FIG. 21 is a right side view of the elevating mechanism showing a state in which the second cam of Modification 1 is loaded by the elevating mechanism provided on the slide member.

FIG. 22 is a partially cutaway front view of the elevating mechanism showing a state in which the second cam of Modification 1 is loaded by the elevating mechanism provided on the slide member.

FIG. 23 is an enlarged side view showing a second cam of Modification 1.

FIG. 24 is a side view showing a state where the second cam of Modification 1 starts to be loaded by the elevating mechanism provided on the slide member.

FIG. 25 is an enlarged perspective view showing a spindle motor.

FIG. 26 is an enlarged cross-sectional view of a positioning pin attachment member to which a positioning pin is attached.

FIG. 27 is a side view when the second cam of Modification 2 starts to be loaded by the elevating mechanism provided on the slide member.

FIG. 28 is a perspective view of an elevating mechanism in which a second cam of Modification 3 is provided on a spindle support member.

FIG. 29 is a plan view of an elevating mechanism in which a second cam of Modification 3 is provided on a spindle support member.

FIG. 30 is a side view when the second cam of Modification 3 is loaded by the elevating mechanism provided on the spindle support member.

FIG. 31 is a plan view of a cartridge holder showing a modification of the shutter opening pin position.

FIG. 32 is an enlarged plan view of an essential part of the cartridge holder when the center position of the shutter opening pin is displaced to the side opposite to the shutter opening side with respect to the center in the width direction of the guide portion.

FIG. 33 is a plan view showing an example of a conventional shutter opening device.

FIG. 34 is a plan view showing another example of a conventional shutter opening device.

[Explanation of symbols]

 1 ... spindle motor 2,118 ... spindle support member 6,7 ... second pin 8,9 ... arm 10,11 ... positioning pin 12,13 ... positioning pin engagement Holes 14, 15 ... Positioning pin mounting member 20, 21 ... Spacer 28 ... Slide member 36, 37 ... Second cam 50, 51 ... First cam 63, 64 ... Cartridge positioning pin 65 ... Cartridge positioning pin lift block 66, 67 ... First pin 72 ... Objective lens 73 ... Optical pickup device 77 ... Cartridge holder 81 ... First injection Plate 82 ... 2nd inject plate 83 ... 3rd inject plate 103 ... Cam groove part 103a ... Inclined part 103b ... Arc Shaped portion 103c ... Linear portion 104 ... Shutter opening pin 105 ... Shutter opening pin support member 118 ... Slit 201 ... Disk cartridge 202 ... Magneto-optical disk 202a ... Chucking hub 211 ... Shutter members 225, 226 ... Cartridge positioning pin engagement holes 228 ... Cartridge retracting pin fitting holes

Claims (4)

[Claims] 1. An inclined portion for generating a component force for rotating an opening member for opening a shutter member of a disk cartridge, and a rotating portion provided continuously to the inclined portion for further rotating the opening member. The cartridge holder is provided with a cam groove portion that is continuous with the rotating portion and that moves the opening member when the disc cartridge is inserted. The cartridge holder is provided along the cam groove portion. A shutter opening device in which an opening member moves. 2. The cartridge holder is provided with a guide portion parallel to the straight portion of the cam groove portion, and
2. The shutter opening device according to claim 1, further comprising a supporting member having an opening member attached to one end thereof and an engaged portion engaging with the guide portion attached to the other end thereof. 3. The support member moves together with the opening member as the disk cartridge moves in the loading direction when the opening member reaches the straight line portion from the rotating portion. Item 2. The shutter opening device according to item 2. 4. The center position of the opening member that starts opening the shutter member is displaced toward the shutter opening side with respect to the center of the guide portion in the width direction before the disc cartridge comes into contact with the opening member. The shutter opening device according to claim 2.