JPH0227552A - Disk driving device - Google Patents

Abstract

PURPOSE:To prevent a cartridge from being hindered by a bias magnet at the time of loading the cartridge by moving the bias magnet against a loading chassis according to the movement of a slide plate. CONSTITUTION:When the loading chassis 10 is located at a retracting position that is a retracting state being separated from a pickup base 12, the bias magnet 90 is set at the retracting position separated from the loading chassis 10. And when the cartridge 120 is loaded, the loading chassis 10 is moved to an operating position where recording and reproduction can be performed on a disk by the movement of the slide plate 16, and also, the bias magnet approaches the loading chassis 10, and is moved to the operating position where a prescribed bias magnetic field can be formed on a disk plane. In such a way, it is possible to prevent the cartridge from being hindered by the bias magnet at the time of loading/unloading the cartridge.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a disk drive device that performs recording and reproduction on a magneto-optical disk built in a hard cartridge.
In particular, the present invention relates to a disk drive device that includes a mechanism that moves a loading chassis that accommodates a disk cartridge up and down in conjunction with the sliding of a slide plate, and also moves a bias magnet up and down with respect to the loading chassis.

<Prior Art> Generally, a disk drive device for performing recording and reproducing processing on a disk cartridge, which is made of a hard plastic cartridge containing a recording medium such as a magnetic disk or a floppy disk, generally has a base that constitutes the device body. ,
A slide plate slidably attached to this;
It consists of a loading chassis that stores the disk cartridge. A pickup mechanism, spindle, etc. for recording and reproducing processing are placed on the base, and the loading chassis is in an operating position where recording and reproducing can be performed on the disc in the disc cartridge, and in a retracted state separated from the base. It is guided so that it can be raised and lowered to and from the retracted position. In order to raise and lower the sides of the loading chassis in conjunction with the sliding operation of the slide plate, the guide roller of the loading chassis is configured to be guided along the slope of the upright surface extending vertically from the side end of the slide plate. There are things that exist. That is, by pushing the slide plate, the guide roller rides on the slope, and the loading chassis is moved upward and ejected to the retracted position. Further, the slide plate is locked at the position where the loading chassis is in the retracted position. On the other hand, when the disk cartridge is loaded into the loading chassis at this retracted position, this lock is released, so the slide plate is moved back by the spring, and the loading chassis is moved down to the operating position to prepare for recording and reproducing processing.

<Problem to be Solved by the Invention> In particular, in a disk drive device that handles a disk cartridge containing a magneto-optical disk, the magneto-optical disk applies a necessary bias magnetic field to the recording/reproducing section of the disk during recording or erasing. Therefore, the bias magnet is placed opposite the pickup mechanism on the pickup base. However,
This bias magnet needs to be arranged so that its magnetic pole part is only about 1 mm apart from the disk recording/reproducing section, so it is necessary to configure the bias magnet so that it does not get in the way when the cartridge is installed or removed.

Means and Effects for Solving the Problems> Therefore, the present invention provides that when the loading chassis is in the retracted position where it is separated from the pickup base and is in the retracted state, the bias magnet takes the retracted position separated from the loading chassis and the cartridge is When loaded, the sliding plate moves to move the loading chassis to the operating position where recording and reproduction of the disc is possible, and the bias magnet approaches the loading chassis to the operating position where the required bias magnetic field is formed on the disc surface. A disk drive device having a mechanism for movement is provided.

<Embodiment> A disk drive device according to a preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

This disk drive device performs recording and reproduction on a magneto-optical disk housed in a known hard cartridge, and mainly includes a main chassis 10, a pickup base 12 attached to the main chassis, and a device on the pickup base. It is comprised of a loading chassis 14 that is supported and accommodates a disk cartridge, and a slide plate 16 that raises and lowers the loading chassis as the disk cartridge is loaded and unloaded.

First, the main chassis 10, as shown in FIG.
It is a substantially rectangular plate-like body having a relatively large opening 18 for accommodating the lower part of the pickup base 12. The main chassis IO has four side chassis 20a, 2
0b, 20c, and 20d are fixed with screws and extend vertically from each side end of the main chassis to form the side surface of the device. Furthermore, guide bins 22a and 22b are installed on the main chassis 10 to guide the sliding movement of the slide plate 16 in the cartridge loading/unloading direction in cooperation with guide grooves 70a and 70b of the slide plate 16, which will be described later.

The disk cartridge loading/unloading side of the main chassis 10 (
A pickup base locking means 30 is attached to the left side of FIG. 3). This pickup base locking means 3
0 includes an arm 32, a positioning pin 34 passing through one end of the arm, and an arm 3 below the positioning pin.
2, and the shaft part 34a of the positioning bin and the large W part 36a of the lock bin, which has a pentagonal cross section (Figs. 18 to 20), are both located above the arm 32 in Fig. 3. It stands out. The other end of the arm 32 is pivoted by a pin 38 to the vertical surface 24a of the L-mount bracket 24 screwed to the loading/unloading port side of the main chassis 10. Although the panel 39 is configured to be rotatable, both ends of the panel 39 are hung over the axis f134a of the positioning bin and the hole 24b formed in the vertical surface 24a, and the panel 39 is wound around the bin 38, so that the arm 32 is always free. The end is urged downward.

As shown in FIG. 4, a mechanism is mounted on the pickup base 12 to enable recording and reproduction of the disc housed inside the disc cartridge when the disc cartridge is completely loaded. , this recording and reproducing mechanism includes a spindle 40. which is inserted into the center opening of the disk. A motor 42 that rotates the spindle. Magnet 44 for adsorbing the disc. Objective lens 46
The actuator 52 irradiates a spot of laser light onto the recording/reproducing section of the disk through the actuator 52 and is configured to be guided by a guide member 48 and moved in parallel by a pair of linear motors 50 . Further, a pickup block 54 is attached to the rear end side of the pickup base 12 on which an optical system for emitting laser light to the objective lens 46 and necessary circuits (not shown) are mounted.

The pickup base 12 has a thickness required for mounting the recording/reproducing mechanism, and its lower portion is accommodated in the opening 18 of the main chassis IO. The pickup base 12 is attached to the main chassis IO using damper members 56 fixed to the four corners of the pickup base 12.
a, 56b, 56c, 56d as side chassis 20a,
20b.

This is done by attaching them to 20c and 20d, respectively. The details of this installation state are shown in Figure 7 on the side chassis 2.
The relationship between the damper member 56c and the damper member 56c is as shown in FIG.
This is attached to the pickup base 12 via screws 58. A metal bushing 60 is embedded in the screw hole of the damper member 56c to prevent the damper member from being deformed by tightening the screw 58. By using this damper member, the pickup base 12 is mounted so as to be allowed to move slightly horizontally relative to the side chassis 20a to 20d, and therefore relative to the main chassis IO. Therefore, even if an external force is applied to the main chassis IO, the sliding force is absorbed by the damper member, and the exact positional relationship required between the disk and the pickup mechanism during pickup is properly maintained. Although FIG. 7 shows a state in which the damper member 56c is attached to the side chassis 20c, it is similarly attached at the other three locations.

Furthermore, a pair of guide pieces 62a and 62b having vertical surfaces are screwed to the left and right sides of the pickup base 12 for guiding the loading chassis 14, and a positioning pier 64a for properly positioning the disk cartridge.
, 64b, 64c, and 64d are implanted. Furthermore, a recess 65 is formed at one end of the pickup base 12 on the cartridge loading/unloading port side to lock the lock pin 36 of the pickup base locking means 30 during ejection.

The slide plate 16 is a plate-like body shaped as shown in FIG. 5, and has an operating portion 66 at one end, and vertical surfaces 67a at two locations on each of the left and right sides.

Projections 6 in which 67b, 67c, and 67d are formed and engage with horizontal IIs (not shown) carved in the side chassis 20a, 20b, 20c, and 20d, respectively.
8a, 68b, 68c, and 68d are formed. In addition, guide pins 22a and 22 installed in the main chassis 10
Guide grooves 70a and 70b are formed into which the guide grooves 70a and 70b are respectively received. Further, a straight portion 74a that avoids the positioning bins 64a and 64b planted on the pickup base 12.

A recess 76 and a guide groove 78 are formed to avoid the positioning pins 74b1 and the positioning pins 64c and 64d. As a result, the slide plate 16 is attached to the main chassis 10 while being allowed to slide 8 degrees in the cartridge loading/unloading direction with respect to the main chassis 10, but the spring 72 is suspended between it and one end of the side chassis 20c. is constantly biased in the cartridge loading/unloading direction (to the left in the figure).

Further, a pickup base rotor cam member 8o is fixed to the slide plate 16. This is for locking the pickup base 12 in cooperation with the pickup base locking means 30 attached to the main chassis IO, and its function will be described later. Also, one end 8
2a is pivoted to the inner extension 21 of the side chassis 20d using an abbreviated slide plate locking member 82,
A bottle 82b hanging down from the other end is thrust into the guide groove 78. This locking member 82 is connected to a spring 8 that is suspended between the locking member 82 and the guide pin 22b that passes through the guide groove 7ob.
4, it is constantly biased counterclockwise.

Next, referring to FIG. 6, the loading chassis 14 consists of an upper plate 14a and side plates 14b that are bent downward from both sides of the upper plate 14a, and the lower ends of the side plates are bent slightly inward to provide a space for accommodating cartridges. be done. This loading chassis 14 is moved up and down so that it assumes an upper position when a cartridge is not loaded and a lower position when a cartridge is loaded. As shown in FIG. 6, there are bars*86a between the left and right side plates 14b, 14b of the loading chassis 14 and the guide pieces 62a, 62b, respectively.
86b is provided to constantly bias the loading chassis 14 in a direction toward the pickup base 12, that is, to take a downward position.

A bias magnet 90 consisting of a coil 89 wound around an E-shaped core 88 is attached to the rear of the loading chassis 14, and forms a magnetic field facing the recording/reproducing section of the disk when the cartridge is loaded. This bias magnet 90 is normally retracted to an upper position,
It is configured to descend during recording and reproduction to form a required magnetic field. That is, the slide pieces 92 are attached to the guide pins 96a, 96b, 9 implanted on the loading chassis 14.
6c and guide rollers 'J2a and 92b formed on the slide piece 92 to receive these guide pins, respectively.
, 92c, the loading chassis 14
The cartridge is attached to the top while being allowed to move slightly in the cartridge loading/unloading direction.

The rear end of the slide piece 92 is formed with upright cam surfaces 97-a and 97b having opposing inclined parts and upright parts. Further, a recess 98 is formed at the rear of the loading chassis 14 for applying a magnetic field from a bias magnet 90 to the disk recording/reproducing surface, and the rear end thereof is connected to the opposing upright surface 10.
0a and lOOb, and elongated slots 102a and 102b are formed in these upright surfaces, respectively. The bias magnet 90 has a connecting pin 10 that passes through the vicinity of the rear end and is inserted into the inclined slots 102a and 102b.
A bin 106a, 1 is connected to the loading chassis 14 by 4 and protrudes outward from both sides of its front end.
06b is the upright cam surface 97a.

By being passed between the racks 97b, the rack is moved up and down following the sliding movement of the slide piece 94. The slide piece 94 is slidable and rotatable around a shaft pin 108b connected to the loading chassis top plate 14a, and has a slot 108c at one end into which the locking pin 95 of the slide piece 92 is loosely fitted. Engaging end 108 that can be engaged with the upper end 671 of the vertical surface 67b of the slide plate 16 at the other end
This is brought about by the sliding movement of the slide plate 16 via the arm 10g having the arrow a, and these operations will be described later. Also, springs 107a and 107b are wound around the pin 104 and have both ends hooked to the holes in the bottles 106a and 106b and the loading chassis 14, so that the bottles 104 and the pins 106a and 106b are always urged downward.

Note that the holes in the loading chassis 14 through which one ends of the springs 107a and 107b pass are the elongated slots 102a and 1.
Since the pin 104 is provided at the center position of the radius of the guide portion of 02b, the pin 104 is located in the long hole slot 102a,
Even if the springs 107a and 107b are moved, one end of the springs 107a and 107b will not slide through the holes in the loading chassis 14. Further, on the rear side of the loading chassis upper plate 14a, a rectangular guide groove 110 and a substantially crescent-shaped guide groove l12 are provided.
are formed, and pins 114b and 114a at both ends of the shutter opening/closing arm 114 are respectively fitted into these guide grooves. This is for opening and closing a shutter that is slidably provided on the cartridge in order to open and close the disc recording/reproducing section, and the details of its operation will be described later. The arm 114 is constantly pulled toward the cartridge loading/unloading direction by a spring 116, and the pins at both ends are aligned with the guide grooves 1, respectively.
10.112 to assume the position shown.

In addition, each loading chassis side plate 14b has three
Guide rollers 118a and 118b are provided at the locations.

118c, 118d, 118e, and 118f are rotatably attached. Among these, the guide roller 118a
, 118b, 118c, and 118d roll on the inclined shoulders of the side upright surfaces 67a, 67b, 67c, and 67e, respectively, of the slide plate 16, and the guide rollers 118e, 118f are fixed to the sides of the big-up heath 12, respectively. The guide pieces 62a and 62b are positioned so as to roll on the vertical portions of the guide pieces 62a and 62b, and are provided to move the loading chassis 14 up and down in accordance with the sliding movement of the slide plate 14.

Main chassis lO and pickup base 12 as described above. Loading chassis 14 and slide plate 16
Figure 1 shows a top view of a disk drive device assembled with the front panel ■7 as the main body and fixed to the front end of the main chassis IO. The figure is Fig. 2.

Note that these FIGS. 1 and 2 show a state in which the cartridge is loaded and recording/reproduction is possible. In this state, the slide plate 16 is at the farthest position to the left, and the operating section 66 protrudes forward from an opening (not shown) in the front panel 17. Although not shown in the drawings, a cartridge loading/unloading port is formed in the front panel 17 as is known in the art. The cartridge loading/unloading port does not coincide with the cartridge accommodating space provided by the loading chassis 14 in the cartridge loading state shown in FIGS. 1 and 2 (that is, when it is in its lower position). When the loading chassis 14 is in the upper position, the cartridge loading/unloading port is aligned with the cartridge receiving space, allowing a cartridge to be loaded into the loading chassis 14.

In the disk drive device having the above-described configuration, various operations associated with cartridge loading and unloading will be described below.

(1) Shutter opening/closing operation The cartridge 120 used in this device is made of hard plastic and houses the magneto-optical disk 130, and the center of the front end allows access of the bias magnet 90 to the recording/reproducing section of the disk. An access window 122 is opened. A shutter 124 that is slidable in the width direction is attached to the front end of the cartridge, and its shutter opening 126 is positioned to coincide with the access window 122 during recording and playback, and when not in use, it closes the access window and closes the disc. Protect your face. Shutter 124 is constantly spring biased to close access window 122.

Especially regarding the operation of opening and closing this shutter 124,
This will be explained with reference to FIGS. 11 to 11.

During loading, that is, when the cartridge 120 is loaded from the cartridge loading/unloading port of the front panel 17 and pushed into the cartridge housing space of the loading chassis 14, the front end of the cartridge 120 passes through the crescent-shaped guide groove 112 at a certain stage. Then, it comes into contact with the bin 114a at one end of the shutter opening/closing arm 114 protruding into the cartridge housing space below (FIG. 8). At this stage, the arm 114 is pulled by the spring 116, so the bin 114a is located at the outermost position of the crescent-shaped guide groove 112.

When the cartridge 120 is further inserted from the state shown in FIG. 8, the bottle 114a resists the biasing force of the spring 116.
is moved inward while being guided by the straight part 1121 of the crescent-shaped guide groove 112, and along with this, the shutter 124
is slid to the right in the figure. As a result, the state shown in FIG. 9 is reached, and then the state shown in FIG. 10 is reached. In the state shown in FIG. 1O, the bottle 114a is located at the innermost position of the crescent-shaped guide groove 112 and is fitted into and locked in the recess 128 formed at the front end of the cartridge, and the arm 114 and shutter 124 are held in this position. The disk surface is exposed through the access window 122 and the shutter opening 126. In the state shown in FIG. 10, necessary recording and reproducing processing is performed.

When the slide plate 16 is operated after the required recording/reproducing process, the engagement between the bottle 114a and the arm rotor recess 128 is released by the operation of the slide plate locking member 82, which will be described later, and the force of the spring 116 suspended on the bottle 114a is released. As a result, the arm 114 is rotated about the bin 114b located at the end of the linear guide groove 110 on the cartridge loading/unloading side. At this time, the bottle 114a is moved along the arcuate portion 112b of the crescent-shaped guide groove 112, and when the cartridge 120 is pushed toward the loading/unloading port, the shutter 124 is closed. FIG. 11 shows the intermediate state at the time of ejection. When the state shown in FIG. 8 is restored, the access window 122 is opened by the shutter 124.
The cartridge 120 is completely closed and partially ejected from the loading/unloading port.

(2) Slide plate locking operation The slide plate 16 is always urged by the spring 72 in the cartridge loading/unloading port direction, but when the cartridge 120 is not completely loaded, it is locked by the slide plate locking member 82. and is held in a pressed state within the device. When the cartridge 120 is completely loaded, this lock is released and the spring 72
The cartridge is slid in the direction of the cartridge loading/unloading port, and its operating portion 66 protrudes from the front panel 17 in preparation for a subsequent ejecting operation.

This slide plate locking operation will be explained below with reference to FIGS. 12 to 14. When the cartridge is not loaded, the slide plate locking member 82 is in the state shown in FIG. is in contact with the front end surface of. In this state, the pin 82b engages the step 78a of the guide hole 78 of the slide plate 16, locking the slide plate 16 in this position.

During loading, when the cartridge 120 is pushed into the device to the position shown in FIG. 12 where its front end coincides with the front end surface of the loading chassis 14, the front end of the cartridge 120 comes into contact with the locking pin 82c of the locking member 82. . When the cartridge is further inserted from this state, the locking member 82 is rotated clockwise about one end 82a against the spring 84, and the pin 82b climbs over the stepped portion 78a and forms a straight section as shown in FIG. 78b. As a result, the slide plate 16 is unlocked and is slid by the spring 72 in the direction of the cartridge loading/unloading port.

Although the cartridge 120 is completely loaded in the position shown in FIG. 13 and is not moved any further (toward the right in the figure), the guide hole 78 is further formed with an inclined portion 78c continuous with the straight portion 78b. Slide plate 16
is further slid from the position shown in FIG. 13 in the cartridge loading/unloading direction to reach the position shown in FIG. 14. This allows pin 82
b is guided to the inclined portion 78c, the locking member 82 is further rotated clockwise, and the locking pin 82c is separated from the front end of the cartridge. This helps to avoid physical contact with the cartridge 120 and prevent sliding toward the pickup base when the slide plate 16 is unlocked, that is, during disc recording/reproducing processing. For example, the operating section 66 of a sliding plate protruding from the front panel 17
Even if a slight external force is applied to the cartridge 120, the locking pin 82c is not in contact with the cartridge 120, so that the sliding will not have an adverse effect on the recording/reproducing process.

At the time of ejection, the slide plate 16 is pushed in the right direction in the drawing, so that, contrary to the above explanation at the time of loading, the state shown in FIG. 14 passes through the state shown in FIG. 13 and becomes the state shown in FIG. 12. The slide plate 16 is locked by the pin 82b being engaged with the stepped portion 78a. In addition, the first
When transitioning from the state shown in Fig. 3 to the state shown in Fig. 12, the pin 82
When the cartridge 120 moves over the stepped portion 78a, the locking member 82 is slightly rotated counterclockwise by the biasing force of the spring 84, and the locking pin 82c pushes the cartridge 120 toward the loading/unloading port. As a result, the engagement between the pin 114a of the shutter opening/closing arm 114 and the lock recess 28 at the front end of the cartridge (FIG. 10) is released, and the shutter 124 is allowed to slide (FIG. 11).

(3) Loading chassis lifting/lowering operation Loading chassis 1 housing the cartridge 120
4 is in the lower position when the cartridge 120 is fully loaded to enable the necessary recording and reproducing processing, and when ejecting the cartridge 120, the slide plate 16 is slid by the push operation of the operating section 66. With this, the cartridge 120 is moved upwardly to the upper position, and the cartridge 120 pushed out by the operation of the slide plate locking member 82 described above can be ejected from the loading/unloading port.

FIG. 15 shows the loading chassis 14 in the downward position, and the guide rollers 118a, 118b, 118C, and 118d protruding outward on both sides are each pulled forward by the spring 72 to the position. Vertical surfaces 67a, 67b, 67c of the slide plate 16 in
, 67d, but their inclined shoulder 670a
, 670b, 670c, 670d (670a, 670
(b only shown in the figure) does not make contact with any part.

Therefore, the physical sliding of the slide plate 16 is caused by the loading chassis 14. via the guide pieces 62a, 62b or the loading chassis 14. The cartridge 1201 is connected to the pickup base 12 and the actuator 52 . The information is prevented from being transmitted to the disk 130, and the necessary recording/reproduction processing is performed smoothly. In addition, the guide roller 118e,
118f is a vertical portion 620a of the guide pieces 62a, 62b extending vertically from both sides of the pickup base 12.

620b (620a only shown) is in contact with the lower end. Also, in this state, cartridge 1
20 is supported on its lower surface by positioning bins 64a, 64b, 64c, and 64d installed in the pickup base 12, and is held parallel to the pickup base 12 with a predetermined clearance, and the positioning bins 64b, 64d The tip of the cartridge 120 enters into a positioning recess 121 provided on the lower surface of the cartridge 120 to prevent wobbling on the parallel surface.

By positioning the cartridge 120 accurately in this manner, the loading chassis 14 is moved by the springs 86a and 86.
It is stably held in this downward position by the urging force b. The disk 130 in the cartridge 120 is attracted and fixed to a turntable placed on a motor 42 using a magnet 44, and is rotatable without contacting the inner surface of the cartridge 120. When the slide plate 16 is slid from this state to the left in the drawing, the guide rollers 118a, 118b, 118c, and 118d rise while being guided by the inclined shoulders 670a, 670b, 670c, and 670a, and the loading chassis 14 is parallel to the will be moved upwards. Guide rollers 118e, 118f and vertical portion 620a.

Since the loading chassis 14 is restricted from moving in the sliding direction of the slide plate 16 by contact with the slide plate 620b, only upward movement is performed against the urging force of the springs 86a and sab. Thus, after going through the state shown in Figure 16, the first
The eject state shown in FIG. 7 is obtained. At this time, since the slide plate 16 is locked by the locking member 82 as described above, this ejected state is maintained unless the cartridge 120 is inserted and the slide plate 16 is unlocked. When the slide plate 16 is unlocked, the slide plate is moved to the right in the figure by the spring 72, and the guide roller 118a is moved.

118b, 118c, 118d are inclined shoulders 670a, 6
70b, 670c, and 670d, and by the biasing force of springs 86a and 86b, the loading chassis 14 is automatically moved downward to the lower position shown in FIG. 15, and is ready for the required recording/reproducing process.

(4) Locking operation of pickup base As mentioned above, in this device, the pickup base 12 is not directly fixed to the main chassis IO, but the damper member 56a,
56. b, 56c.

side chassis 20a, 20b via 56d;

It is attached to 20c and 20d. Buffering is provided by these damper members, and the pickup base 12 is allowed to be slightly displaced in the horizontal direction with respect to the main chassis IO. In such a configuration, when the slide plate 16 is pushed to raise the loading chassis 14 during ejection, the guide rollers 118a, 11
8b, 118c, 118d are inclined shoulders 11S670a, 6
70b.

670c, 670d from the state shown in FIG.
When shifting to the state shown in Fig. 7, the guide rollers 118e, 1
18f and the vertical portions 620a, 6 of the guide pieces 62a, 62b.
Due to the contact with 20b, the pickup base 12 moves slightly to the left in the drawing, resulting in an unfavorable operating feeling. Therefore, a pickup base locking means 30 is employed to lock the pickup base 12 to the main chassis 10 at the stage shown in FIG. TS16. The locking operation by this pickup base locking means 30 will be explained below with reference to FIGS. 18 to 20. These FIGS. 18 to 20 show the same stages as shown in FIGS. 15 to 17, respectively.

The arm 32 of the pickup base locking means 30 is always urged counterclockwise in the drawing by a spring 39.
In the cartridge loading state shown in FIG. 18, the positioning pin 34 rides on the inclined cam surface 80a of the cam member 80 on the slide plate 16, which is being pulled toward the right in the figure, so that the positioning pin 34 is pushed against the spring 39 and In this state, the enlarged portion 36a of the lock pin 36 is separated from the engagement recess 65 of the pickup base 12.

Therefore, in this state, the pickup base locking means 3
0 is inactive, and the pickup base 12 is damped by the damper members 56a, 56b, 56c, and 56d, and the actuators 52. Protects disk 130 from external sliding.

When the slide plate 16 is pushed from this state to the state shown in FIG. 19, the positioning pin 34 falls from the inclined cam surface 80a, and the arm 32 is rotated counterclockwise in the figure about the shaft 38 by the spring 39. The enlarged portion 36a of the lock bin 36 is fitted into the recess 65, and the pickup base 1
2 to the main chassis lO. At this point, as shown in FIG. 16, the loading chassis 14 still remains in the lower position. Slide plate 1
6 is further slid leftward in the drawing from the position shown in FIG. 19 and assumes the position shown in FIG.

In short, when the slide plate 16 is slightly pushed in, the pickup base 12 is first locked, and when the slide plate 16 is further pushed forward, the loading chassis 14 is moved upward with this lock maintained. In this embodiment, by pushing the slide plate 16, its vertical surface inclined shoulders 670a, 670b, 670c,
Guide rollers 118a, 118b, 118c on 670d
, 118d contact the lock pin 36 at the same time as the recess 6.
5 to lock the pickup base 12, the pickup base 12 may be locked immediately before the guide roller comes into contact with the inclined shoulder.

When the cartridge 120 is loaded into the loading chassis 14 from the ejected state shown in FIG. return to the state.

(5) Elevating and lowering operation of bias magnet The bias magnet 90 attached to the loading chassis 14 not only moves up and down as the loading chassis moves up and down, but also moves upward and away when the loading chassis is in the eject state. In a loading state in which the loading chassis is in a lower position, the disc is moved up and down so as to be relatively close to the loading chassis and take an operating position to form a required magnetic field against the disk surface. This is because when the bias magnet 90 is fixedly attached to the loading chassis 14 so as to provide the necessary clearance with the disk surface to form the required bias magnetic field, the bias magnet 90 is fixedly attached to the loading chassis 14 during the loading operation of the cartridge 120.
This is because the magnetic pole part of o becomes a hindrance. The raising and lowering operation of the bias magnet will be explained below with reference to FIGS. 21 to 23.

FIG. 21 shows the cartridge loaded state, at which time the engaging end 108a of the arm 108 installed between the loading chassis 14 and the slide piece 92 comes into contact with the upper end 671 of the vertical surface 67b of the loading chassis slide plate 16. Not in contact. Pins 106a and 106b are springs 107a
, 107b, so
In this state, the pins 107a and 107b do not ride on the upright cam surfaces 97a and 97b of the slide piece 92, but are located in front of them. and pin 10 on the other end
4 is also pressed downward by springs 107a and 107b to form an inclined slot 102a.

102b, the bias magnet 90 occupies an operative position in close proximity to the loading chassis 14.

In this cartridge loading state, the engaging end 108a of the arm 108 is not in contact with the upper end 671 of the slide plate 16, so even if a hand or an object comes into contact with the operating section 66 of the slide plate 16, the arm 108, loading Chassis 14. Cartridge 120, positioning pins 64a, 64
(b) The sliding motion is not transmitted to the pickup base 12, furthermore to the disk 130 or the actuator 52, and the position of some parts of the bias magnet 90 does not change. If the slide plate 16 is pushed forward from this cartridge loaded state, it will reach the state shown in FIG. No change in part position is observed.

The loading chassis 14 also still remains in the lower position.

When the slide plate 16 is further pushed to the left in the figure, the arm engaging end 108a is pushed by the upper end 671 of the vertical surface 67b of the slide plate and rotates clockwise in the figure about the shaft 108b. As a result, the guide pins 96a, 96b, 96c on the loading chassis 14 are inserted into the guide slots 92a, 92b, 92C of the slide piece 92.
While being guided, the slide piece 92 is slid in the right direction in the figure, opposite to the slide plate 16. The pins 106a and 106b at the tip of the bias magnet 90 are the springs 107a.
, 107b, the upright cam surface 97a of the slide piece 92
, 97b. As a result, the bias magnet 90 changes from the state shown in FIG. 22 to the connecting pin 104.
Rotate counterclockwise in the figure approximately around the center. This rotation continues until the bins 106a, 106b completely ride up the slope of the sloped shoulders 97a, 97b to the upright position. Then, when the slide plate 16 is pushed to the next page and the slide piece 92 is slid to the right in the figure, the bottles 106a and 108b move to the right while maintaining their raised positions, and the pins 106a and 108b move to the right. 106b, the connecting bin 104 connects to the inclined slots 102a, 102.
Rotate clockwise as shown in the figure while being guided by b.

As a result of such a series of operations, the bias magnet 90 is moved upward parallel to the loading chassis 14, and assumes the retracted position shown in FIG. 23. This second
As soon as the state shown in FIG. 3 is obtained, the slide plate 16 is locked by the locking member 82, so that the bias magnet 90 is held in the retracted position.

When the cartridge 120 is loaded, the slide plate 16 is pulled back by the spring 72 as described above, and the bias magnet 90 automatically returns to the operating position shown in FIG. 21 through the state shown in FIG. 22.

In the above embodiment, the loading chassis 14 includes the guide rollers 118e and 118f, the guide piece 62a,
62b in the mounting direction, guide rollers 118e and 118f are guided by guide rollers 118a and 118.
c or the guide rollers 118b and 118e.

Further, although the present invention is particularly suitable for use in a disk drive device that uses a disk cartridge that accommodates an optical disk, it may also be used in a disk drive device that uses a disk cartridge that accommodates a floppy disk or a magnetic disk. In this case, the pickup mechanism includes a magnetic head, a stepping motor, and the like.

<Effects of the Invention> In the disk drive device of the present invention having the configuration described above, the bias magnets arranged at a slight interval in order to form the required magnetic field in the disk recording/reproducing section are controlled by the movement of the slide plate. Since the bias magnet is configured to move relative to the loading chassis as the cartridge is mounted, the bias magnet does not get in the way when the cartridge is installed.

[Brief explanation of the drawing]

FIG. 1 is a top view of a disk drive device according to an embodiment of the present invention in a cartridge loaded state, FIG. 2 is a top view similar to FIG. 1 showing a state in which the loading chassis is assembled, and FIG. 4 is a plan view showing the main chassis and related members that make up this device, FIG. 4 is a plan view showing the pickup base and related members that make up this device, and FIG. 5 is a slide plate that makes up this device. FIG. 6 is a plan view showing the loading chassis constituting this device and members related thereto; FIG. 7 is an enlarged cross-sectional view showing the mounting state of the pickup base; FIG. 8 FIGS. 11 to 11 are schematic plan views illustrating the shutter opening/closing operation over time as the disk cartridge is pushed forward, and FIGS. 12 to 14 are schematic plan views illustrating the locking operation of the slide plate over time as the disk cartridge is pushed forward. FIGS. 15 to 17 are schematic plan views, and FIGS. 18 to 20 are schematic side views illustrating the lifting and lowering movement of the loading chassis over time as the slide plate is pushed forward.
The figure is a schematic side view illustrating the locking operation of the pickup base over time as the slide plate is pushed forward, and Figures 21 to 23 are schematic side views illustrating the upward and downward movements of the bias magnet over time as the slide plate is pushed forward. They are a schematic plan view and a side view. Explanation of symbols 10: Main chassis 12: Pickup base 1
4: Loading chassis 16: Slide plate 20a
, 20b, 20c, 20d: Side chassis 22a
, 22b nisride plate guide pin 30: Pickup base rotor means 32: Arm 34: Positioning pin 36: Lock pin 38: Axis pin 39: Spring 56
a, 56b. 56C, 55d: Damper member 62a, 62b: Loading guide piece 64a, 64b, 64c. 64d: Positioning pin 65: Pickup base lock recess 66: Eject operation section 67a, 67b,
67c, 67d: Upright surface 70a. 70b guide groove 72: Spring 78 guide groove 80:
Cam member for big up base lock 82 Ni slide plate lock member 84: Spring 90: Bias magnet 94: Slide piece for bias magnet 108: Arm 114: Shutter opening/closing arm 118a, 11
8b, 118c. 118d, 118e, 118f guide rollers 120:
Cartridge 126: Shutter 128 Recess for near-mock 130: Disk Figure 1 Figure 8 + 20 5d Figure 23 Procedural amendment 1999/7377 1, Indication of case 2, Title of invention 3, Person making the amendment Case Relationship with Name 4, Agent Address 1988 Patent Application No. 177522 Disk Drive Device

Claims (4)

[Claims] (1) A main chassis on which at least a pickup mechanism for recording and reproducing the disk is placed; a first position that accommodates the disk cartridge and enabling recording and reproducing the disk; and a main chassis from which the pickup mechanism is placed. a loading chassis that is movable between a second position where the loading chassis is evacuated and is set in the retracted state; a first position provided on the loading chassis and which is close to the disk; and a first position where the loading chassis is evacuated from the disc and is set in the retracted state. a bias magnet movable between the first position and the second position; a bias magnet movably attached to the main chassis while being biased in one direction; a slide plate for moving the bias magnet between the first position and the second position, a bias magnet moving mechanism provided on the loading chassis for moving the bias magnet between the first position and the second position, and a bias magnet moving mechanism for moving the bias magnet between the first position and the second position; A disk drive device comprising: interlocking means for interlocking the movement of the disk drive device. (2) On the main chassis, via a damper means,
The disk drive device according to claim 1, wherein a pickup base on which the pickup mechanism is placed is supported. (3) The disk drive according to claim 1 or 2, wherein the interlocking means comprises an arm that is pivotally supported by the loading chassis and is in a non-contact state with the slide plate when the loading chassis is in the first position. Device. (4) a main chassis, a pickup base on which at least a pickup mechanism for recording and reproducing a disk is placed, and a pickup for preventing external sliding acting on the main chassis from being transmitted to the pickup base. damper means disposed between the base and the main chassis; a loading chassis capable of accommodating a disk cartridge; a first position provided on the loading chassis and brought close to the disk; and a first position evacuated from the disk and in a retracted state. a bias magnet movable between a second position and a first position, which is provided on the pickup base and is spaced apart from the pickup base and a first position where the loading chassis is capable of recording and reproducing the disc; a guide means for guiding the loading chassis so that the loading chassis can be moved between the first position and a second position, which is a retracted state; a slide plate having an inclined surface for moving the loading chassis to and from the first position, the inclined surface being in a non-contact state with the loading chassis when the loading chassis is in the first position; a bias magnet moving mechanism provided on the loading chassis for moving the bias magnet between the first position and the second position; an interlocking means provided on the chassis for interlocking the bias magnet moving mechanism with the movement of the slide plate, the interlocking means being in a non-contact state with the slide plate when the loading chassis is in a first position; A disk drive device comprising: