JP2551145Y2 - Disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly, to a disk drive used by mounting a disk cartridge containing a magnetic disk as an information recording medium.

[0002]

2. Description of the Related Art A conventional disk drive apparatus of this type includes a chassis formed by press molding, a cartridge holder supported by the chassis so as to be able to move up and down, and holding a disk cartridge when the disk cartridge is inserted into the apparatus; A turntable for mounting the magnetic disk housed in the case, a spindle motor arranged on the bottom side of the chassis to rotate the turntable, a back yoke attached to the spindle motor, and connected to the spindle motor The upper and lower magnetic heads that write and read signals to and from both sides of the printed circuit board, the magnetic disk loaded on the turntable, and the upper magnetic head at the free end are rotatable. Hold case and hold the lower magnetic head A carriage for rotating supporting the scan,
It mainly comprises a stepping motor for moving the carriage in the radial direction of the magnetic disk. The raising and lowering operation of the cartridge holder is performed by a known cam mechanism that is linked to the operation of the movable slide plate. That is, when the disk cartridge is inserted to the innermost portion in the cartridge holder, the eject arm is locked by the lock lever with the shutter of the disk cartridge opened, and at the same time, the slide plate is unlocked, and the elastic force of the spring is released. As a result, the slide plate moves to the cartridge insertion port side, and with this movement, the cam mechanism lowers the cartridge holder to the load position. Also, when the eject button connected to the slide plate is pushed in when the cartridge holder is at the load position, the cartridge holder is raised by the cam mechanism as the slide plate moves to the back side, and the lock lever and The eject arm rotates and the disk cartridge moves to the cartridge slot with the shutter closed,
The cartridge is ejected from the cartridge slot outside the device.

[0003]

The disk drive of this type is required to be thinner and lighter.
For this purpose, the chassis is made thin, and reinforcing ribs are formed on the chassis so as to maintain rigidity.
FIGS. 17A and 17B show ribs of a chassis of a conventional disk drive device, FIG. 17A is a cross-sectional view showing a base material of the chassis, and FIG. 17B is an explanatory diagram showing a chassis on which ribs are formed. This FIG.
In (b), 100 is a chassis, and 101 is a reinforcing rib formed on the chassis 100. The reinforcing ribs 101 were formed by half-punching the base material A of the chassis 100 shown in FIG. The rib 101 formed by the half punching can be reduced in height and width and is effective when there are dimensional restrictions. However, in the rib 101, as shown in FIG. The portion was as small as S, the increase in section modulus was small, and the improvement in rigidity was not large. On the other hand, when reinforcing ribs having a semicircular cross section or a triangular cross section are used to obtain sufficient rigidity, not only is it difficult to adopt this shape due to dimensional restrictions, but also drawing is performed, and distortion occurs in the chassis, resulting in component accuracy. Had an adverse effect.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a disk drive device capable of improving bending rigidity with ribs having small height and width, and achieving reduction in thickness and weight. To provide.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a turntable for loading and rotating an information recording disk, a carriage to be transported in a direction intersecting the direction of rotation of the information recording disk, and the carriage. A hold case rotatably supported at one end thereof, an upper head provided on a surface facing the carriage at a tip of the hold case, and a lower head provided on the carriage facing the upper head. A disk drive device comprising a head and a chassis on which these components are mounted, wherein the chassis is provided with a reinforcing rib, wherein the rib is deformed within the thickness of the chassis. The flat part on the outer surface side of the flat part is formed larger than the flat surface on the inner surface side of the flat part. It is achieved by.

[0006]

According to the above means, while the ribs are small in height and width, the section modulus is increased and the rigidity is improved.
No distortion occurs because it is not drawing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 16 are views for explaining a disk drive according to an embodiment of the present invention. FIG. 1 is a plan view showing a disk drive according to an embodiment of the present invention, and FIG. FIG. 3 is a side view of FIG. 2 showing a cartridge holder and the like of the disk drive according to the embodiment; FIG. 4 is a side view of FIG. 2; FIG. 5 is an exploded perspective view of a stepper holder of the disk drive device according to one embodiment of the present invention. FIG. 6 is a plan view showing a mounting state of a stepper of the disk drive device according to one embodiment of the present invention. FIG. 7 shows FIG.
FIG. 8 is an explanatory view showing a method of attaching a stepper, FIG. 9 is a perspective view of a carriage device of a disk drive device according to an embodiment of the present invention, and FIGS.
FIG. 11B is a plan view and a side view of the carriage device of the disk drive device according to the embodiment of the present invention.
(B), (c) is a plan view showing a deployed state and a folded state of the hinge of the disk drive device according to one embodiment of the present invention, a cross-sectional view taken along line BB of FIG. FIG.
13 is a perspective view of a main part of a conventional hinge shown for comparison in FIG. 11, FIGS. 13 (a) and 13 (b) are a perspective view and a longitudinal sectional view showing an attached state of a guide shaft, and FIG. FIG. 15 is a bottom view of a disk cartridge used in a disk drive device according to one embodiment of the present invention, and FIG. 16 is a conventional view shown for comparison in FIG. FIG. 3 is an exploded perspective view of a stepper holder of the disk drive device.

In these figures, a disk drive 1
Are a spindle motor 3, a chassis 4 provided with the spindle motor, a carriage 7 provided on the chassis 4 and having a pair of magnetic heads 5 and 6 at the ends, and a carriage 7 to be described later. A carriage transfer device 9 for transferring in the radial direction of the disk drive, a turntable protruding above the chassis 4 and rotationally driven by a spindle motor 3 mounted on the chassis 4, and a disk cartridge 10
Is held in the apparatus, and the cartridge holder 11 is supported so as to be vertically movable with respect to the chassis 4.
And a slide plate 14 for moving the cartridge holder 11 up and down, and an eject lever 12 for introducing the disk cartridge 10 to the load position and pushing it from the load position to the discharge position.

The chassis 4 is formed by press working of an aluminum alloy, and a carriage transfer device 9 is provided on the rear side of the disk drive device 1 which is the upper side in FIG.
A turntable is provided on the lower front side, and a cartridge holder 11 and a slide plate 14 are provided around the turntable.

As shown in FIG. 1, the carriage transfer device 9 is supported by a carriage 7 on which a lower magnetic head 5 is mounted and an end of the carriage 7 on which a demagnetizing head is mounted, and is capable of swinging. Mounted hold case 16
A guide shaft 17 that supports the carriage 7 at the lower center of the carriage 7, a screw shaft 19 that is provided in parallel with the guide shaft 17 and has a spiral feed groove 18 formed in the outer peripheral portion, Protruding from
It is mainly composed of a follower pin 20 and a support member 22 for supporting a follower spring 21. 23 is a guide shaft holding member for fixing the guide shaft 17 to the chassis 4. The carriage 7 is slidably supported by a guide shaft 17 via a bearing, and is movable along the radial direction of the magnetic disk 8 mounted on the turntable. The follower pin 20 is formed integrally with the support member 22, and the follower spring 21 is fixed to the lower surface of the support member 22 with a set screw. Follower pin 2
Numeral 0 protrudes so as to match the inclination direction of the feed groove 18, and the follower spring 21 and the follower pin 20 elastically clamp the screw shaft 19 to prevent the follower pin 20 from coming off the feed groove 18.

As shown in FIGS. 1 and 2, one end of the screw shaft 19 is connected to the stepping motor 15, and is rotated in synchronization with the rotation of the stepping motor 15. When the screw shaft 19 rotates, the follower pin 20 converts the rotational motion into a linear motion, and the carriage 7 reciprocates along the guide shaft 17 according to the rotation amount of the screw shaft 19,
The magnetic disk 8 is transported to the commanded track position. A stepper bracket 36 holds the screw shaft 19 and the stepping motor 15.

This cartridge holder 11 is shown in FIGS.
As shown in FIG.
0 and an upper surface portion 41 formed of a thin plate connecting the cartridge holding portion 40, the lower portion of the cartridge holding portion 40 supports the lower surface of the disk cartridge 10, and all other lower surface portions are open. The turntable and a hub 42 described later of the magnetic disk 8 can face each other, and a cartridge insertion port 43 is provided on the cartridge insertion side A. The cartridge holding portion 40 of the cartridge holder 11 is further formed with projections 46, 46 which engage with a guide groove 44 and a guide notch 45 of the chassis 4 described later. The cartridge holder 11 is constantly elastically urged toward the chassis 4 by a coil spring (not shown).

An eject lever 12 is provided on the upper right portion of the cartridge holder 11 in FIG.
7, is supported by the support shaft 58 so as to be swingable in a state of being elastically biased in the ejecting direction (counterclockwise) at all times. The swing end of the eject lever 12 is brought into contact with the side end of the shutter 59 together with the rotation of the eject lever 12 to open the shutter 59 of the disk cartridge 10. In addition, the eject lever 12 is
When the disc cartridge 10 is inserted and the cartridge holder 11 descends, it engages with a lock member (not shown), thereby preventing the eject lever 12 from rotating in the counterclockwise direction (FIG. 1). It will be locked in the pushed state. Further, an arm contact portion 61 that contacts the arm 60 of the hold case 16 and opens the hold case 16 of the cartridge holder 11 is extended.

On the inner surfaces of the side plates 47 and 48 of the chassis 4,
As shown in FIGS. 1 to 3, a guide groove 44 and a guide notch 45 for guiding the protrusion 46 provided on the cartridge holding portion 40 of the cartridge holder 11 are formed, respectively. The magnetic disk 8 can be loaded and unloaded by moving substantially vertically to the chassis 4 along the guide of the guide notch 45. This movement is performed by a cam mechanism, which will be described later, which is disposed on the upper surface of the cartridge holder 11 and moves vertically according to the operation of the slide plate 14 which can move in parallel along the upper surface. When the eject button 24 connected to the slide plate 14 is pushed in the depth direction of the chassis 4 in the state, the cartridge holder 11 is pushed up in the unloading direction with the movement.

The slide plate 14 is mounted on the upper surface of the cartridge holder 11 as shown in FIGS.
Sliding motion in the front-rear direction with respect to the cartridge holder 11 (chassis 4) is allowed. This slide plate 1
4 is provided with an upper surface plate 49 and side plates 50, 50 bent downward from both side edges of the upper surface plate 49.
One of the side plates 50, 50 of the slide plate 14 is brought into contact with the protrusion 46 when the load is not loaded, and the parallel cam portions 51, 52 parallel to the upper surface of the chassis 4, and the cartridge holder 11 is lowered during the loading operation. In addition, inclined cam portions 53 and 54 formed with a downward slope on the rear (rear) side with respect to the chassis 4 for raising at the time of the eject operation are provided at the front and rear two places. Before and after the parallel cam part 5
1 and 52, the side closer to the cartridge insertion side A (parallel cam portion 51) is set higher than the back side (parallel cam portion 52), and as will be described later, the disk cartridge 10 is inserted diagonally. When the holder 11 is lowered to the loading position, the disk cartridge 10 is in a horizontal state. The slide plate 14 is constantly urged toward the cartridge insertion side A by a slide spring 55. The slide plate 14 is locked and held by the eject lever 12 at the loading position, that is, the pushing position. The parallel cam portions 51 and 52 and the inclined cam portions 53 and 5
The cam mechanism is configured by the guide groove portion 44, the guide notch portion 45, the protrusion 46, and the like. This slide plate 1
4, a button mounting portion 56 for mounting the eject button 24 is integrally provided.

As shown in FIG. 15, the disk cartridge 10 contains a flexible magnetic disk 8 in a hard case 64 made of synthetic resin.
A metal shutter 59 is mounted on one end of the base 4 so as to be able to reciprocate in a state where it is always elastically urged in a closing direction (direction of arrow D) by a built-in spring (not shown). At a predetermined position of the shutter 59, an opening 66 having substantially the same shape as the head insertion hole 65 formed in the case 64 is provided. When the shutter 59 is opened, the head insertion hole 65 and the opening 66 coincide with each other. The magnetic heads 5 and 6 can slide on the magnetic disk 8 from outside the case 64. The bottom surface of the case 64 further includes a hub protrusion hole 6 for exposing the hub 42 of the magnetic disk 8 to the outside of the case.
7, a positioning hole 68 for positioning the disk cartridge 10, and an engaging groove 69 for loading which is also opened on the side surface.

When the disc cartridge 10 is inserted, as described above, the cartridge holder 11 is held at an angle of 0.5.degree.
At the position where the upper and lower magnetic heads 5 and 6 are at the innermost circumference of the magnetic disk 8, the upper surface of the magnetic disk 8 does not abut against the upper magnetic head 6 and the upper and lower magnetic heads 5 and 6 are at the outermost circumference of the magnetic disk 8. In the position of the disk cartridge 1
The disk cartridge 10 (magnetic disk 8) is inserted obliquely so that the lower surface of the magnetic disk 0 (magnetic disk 8) does not hit the lower magnetic head 5. Therefore, the descending amount of the disk cartridge 10 at the innermost peripheral position of the upper magnetic head 6 is approximately r1 × tan 0.5 °.
(However, r1 is the distance from the axis of the turntable to the upper magnetic head 6 at the innermost peripheral position). Thus, the thickness of the entire disk drive device 1 can be reduced.

Next, loading and unloading operations of the magnetic disk drive 1 having the above-described structure will be described. When the disc cartridge 10 is inserted from the unloaded state, the disc cartridge 10 is first inserted obliquely at the unload position. Then, the rotating end of the eject lever 12 contacts the side surface of the shutter 59 at the tip of the disk cartridge 10, and when the disk cartridge 10 is further pushed in, the eject lever 12 rotates about its support shaft 58, and the eject lever 12 12
When the shutter 59 is released by the rotation end of the shutter, the shutter 59 moves backward. Then, when the disk cartridge 10 is inserted to the innermost part of the cartridge holder 11, not shown,
The lock of the slide plate 14 is released, and the slide spring 5
The elastic plate 5 moves the slide plate 14 downward in FIG. 1 (toward the front surface of the magnetic disk drive 1). When the slide plate 14 is released, the shutter 59 is fully opened. Further, the slide plate 14 is slid in the direction of arrow B, and when the hub 42 of the disk cartridge 10 is located directly above the turntable and is at a position where the disk cartridge 10 can no longer be introduced, the protrusion of the cartridge holder 11 is just reached. 46 is set so as to be located above inclined cam portions 53 and 54 formed on the side plate 47 of the slide plate 14. Thereby, the slide plate 14 that has been slid is further moved in the direction of arrow B by the action of the elastic force for urging the cartridge holder 11 in the base direction and the inclined cam portions 53 and 54 formed on the side surfaces of the slide plate 14. The cartridge holder 11 moves vertically along the guide groove 44 and the guide notch 45 toward the chassis 4 and the magnetic disk 8 is loaded on the turntable, and the magnetic heads 5 and 6 are moved from the head insertion holes 65 to the case 64. And enters the magnetic disk 8 to make recording / reproduction possible. Thus, the upper magnetic head 6 on the side of the hold case 16 touches the magnetic disk 8 and the carriage 7
The magnetic disk 8 is sandwiched between the lower magnetic head 5 and the lower magnetic head 5.
The loading state is established, and the loading of the magnetic disk 8 is completed. When the recording or reproduction is completed and the disc cartridge 10 is taken out, an eject operation is performed. At this time, when the eject button 24 is pushed into the rear side of the chassis 4, the slide plate 14 is pushed.
Move accordingly to the rear side, push up the protrusion 46 of the cartridge holder 11 along the inclined cam portions 53 and 54, position the protrusion 46 on the parallel cam portions 51 and 52, and move the cartridge holder 11 upward (chassis). 4 (in a direction away from C.4) to enter the unload state. When the slide plate 14 is further pushed in, the slide plate 14 is locked at the back side position, and the movement of the slide plate 14 releases the lock of the eject lever 12 so that the eject lever 12 is pivoted about the support shaft 58 by the elastic force of the eject spring 57. 1 to eject the disc cartridge 10 in the direction of arrow B. In the process of ejecting, the shutter 59 of the disk cartridge 10 engaged with the eject lever 12 also moves in the closing direction, and is naturally closed when ejected. Therefore, the eject lever 12 also functions as a shutter opening / closing lever. In this manner, the disk cartridge 10 can be manually removed only after the ejection.

A reinforcing rib 82 is formed on the chassis 4. The reinforcing ribs 82 are formed by pressing a base material of the chassis 4 as shown in FIG.
Is composed of an inclined portion 83 and a flat portion 84 at the top of the inclined portion 83 which are deformed within the thickness of the chassis 4, and a flat surface 84 a on the outer surface side of the flat portion 84 is formed on the inner surface side of the flat portion 84. It is formed larger than the flat surface 84b. As a specific processing method, the reinforcing rib 82 having the above-described cross-sectional shape can be formed by attaching surfaces to both the punch and the die of the half punch. Thereby, the reinforcing ribs 82
Height and bending rigidity can be improved.

By the way, conventionally, as shown in FIG.
The guide shaft was fixed to the chassis. In FIG. 14, reference numeral 76 denotes a chassis; 77, a guide shaft; 78, a positioning projection cut into the chassis 76 and formed to protrude upward; 79, a shaft holding plate portion fastened and fixed to the chassis 76 by screws 80; Shaft holding plate 7
9 is a thrust direction stopper portion of the shaft formed at the tip of No. 9. The guide shaft 77 is fixed to the chassis 76 by the positioning projection 78 and the stopper 81. In such a conventional apparatus, the number of parts is large, and the assemblability is poor. Therefore, FIGS. 13 (a) and 13 (b)
The configuration shown in FIG. In FIGS. 13A and 13B, 4
Is a chassis; 70 is an opening formed in the chassis 4;
Is an escape hole, 72 is a concave step, 73 is a stopper on the side surface of the concave step 72, 74 is a shaft holding plate, and 17 is a guide shaft. One end of the guide shaft 17 is placed on the concave step portion 72, and is fixed with a screw by a shaft holding plate portion 74. Even if a thrust force acts on the guide shaft 17 and the guide shaft 17 is displaced in the axial direction, the position of the guide shaft 17 is regulated by contacting the stopper 73. In such an embodiment, since the stopper 73 is formed by forming the concave step 72, the shapes of the chassis 4 and the shaft holding plate 74 are simplified, and the processing cost can be reduced. Further, since the position is determined only by mounting the guide shaft 17, the assemblability of fixing the guide shaft 17 is improved, and the space can be saved and the thickness can be reduced.

By the way, as the disk drive becomes thinner, a carriage plate 86 made of sheet metal is used as a part of the carriage 85 as shown in FIGS. 9, 10 (a) and 10 (b). The bearing 88 of the guide shaft 87 is
There is no longer any space for press-fitting the sintering metal as in the past. The structure for directly receiving the guide shaft 87 by the mold has to be adopted. The arm 8 connecting the molded bearing 88 and the carriage plate 86 is also provided.
8a cannot be made too thick due to its height, so its rigidity is also weak. In such a structure, when loading the hold case 89 into the carriage 85, the load spring 90 becomes an obstacle, so conventionally, the hold case was incorporated with the load spring scratched by an external jig. According to this method, a force is applied to the molded bearing portion 88, and it is damaged. Therefore, FIGS. 9 and 10
As shown in (a) and (b), the spring 85 is provided on the carriage 85, and the load spring 90 is retracted to prevent the bearing 88 from being damaged.

In such a disk drive device, a load spring 90 is preliminarily mounted on the carriage 85 in the process, and the disk drive is mounted on a chassis in this state. Therefore, when assembling the hold case 89, it is necessary to slide and install the hold case 89 while avoiding interference with the load spring 90. In addition, there is a risk that the foot of the hold case 89 may come off the carriage 85 after being assembled. Therefore, a projection is provided on the carriage 85 as shown in FIGS. 9, 10A and 10B, and a stopper 93 is provided so that the hinge 92 does not come off. Also,
The provision of the inclined portion 94 on the stopper 93 makes it easier to incorporate the hinge 92.

By the way, DSA (SIDE1 and SIDE1)
During the work, it is necessary to insert a pin of a jig (not shown) into the hole 95 in FIG. 12 and move the hinge (hold case) in the direction of the arrow.
Needs to be rigid. Conventionally, as shown in FIG. 12, a separate member (reinforcement plate) 103 is conventionally connected to the hinge 104 by caulking or spot welding. Therefore, the number of parts has increased and the number of steps has also increased. Therefore, as shown in FIG. 11 (a), the reinforcing plate is also formed integrally with the hinge 63, and as shown in FIGS. 11 (b) and 11 (c), the end 63a of this hinge 63 is bent by the bending line portion 97. It is folded and folded in two and attached and fixed to the carriage 85 with fastening screws. In this way, the rigidity of the adjustment portion of the hinge 63 is improved without caulking or fixing the reinforcing plate to the hinge by spot welding or the like as in the related art.
The cost has been reduced. In addition, it may be folded in three instead of two.

FIGS. 6, 7, and 8 show a method of mounting the stepping motor of the carriage transfer device. In these figures, reference numeral 30 denotes a jig, and pins 31 and 32 of the jig 30 are used for positioning and positioning the chassis 4. Insert into fixing holes 32 and 33, respectively. Then, the long hole 37 of the stepper bracket 36 is fitted into the pin 35 of the jig 30 projecting from the hole 34 of the chassis 4, and the stepper bracket 36 is placed on the chassis 4. Thereby, the spindle motor 3
At a predetermined distance R from the axis 3a of the stepper bracket 36.
Can be positioned. Thereafter, the position and inclination of the screw shaft 19 are adjusted using a jig 38 that is parallel to a predetermined distance with respect to the guide shaft 17 already mounted and fixed to the chassis 4, and the screw 25 is screwed into the screw hole 26. Then, the stepper bracket 36 is fastened and fixed to the chassis 4. Reference numeral 27 denotes a back yoke. The back yoke 27 is a flexible printed board (FP) (not shown).
C), the spindle motor 3 is fixedly attached by, for example, a double-sided tape. The back yoke 27 is positioned and fixed by the positioning and fixing holes 32 and 33. Next, a method of attaching the stepping motor of the carriage transfer device will be described. The pins 31 and 32 of the jig 30 are inserted into the positioning and fixing holes 32 and 33 of the spindle motor 3, respectively. Then, the long hole 37 of the stepper bracket 36 is fitted into the pin 35 of the jig 30 projecting from the hole 34 of the chassis 4, and the stepper bracket 36 is placed on the chassis 4. Thus, a predetermined distance R (in fact, the distance R _2, is determined by the distance R ₁ between the pin 35 and the hole 32 of the jig 30) from the axis 3a of the spindle motor 3 can be positioned stepper bracket 36 . Thereafter, the screw shaft 1 is fixed to the guide shaft 17 already fixed to the chassis 4 by using a jig 38 which is parallel to a predetermined distance.
The position and inclination of 9 are adjusted, and the stepper bracket 36 is tightened and fixed to the chassis 4 with the screw 25. In this manner, the positioning of the stepper is determined by using the boss 102 of the conventional chassis 76 shown in FIG. 16, the holes of both the chassis 4 and the stepper bracket 36, and using the pins 31, 32, and 35 of the jig 30 based on the center of the spindle. Positioning has been enabled. Conventionally, as shown in FIG. 16, since the stepper bracket mounting position (boss 102) is determined by the dimensions of the components of the chassis 76, errors cannot be fully absorbed or accumulated and the positional accuracy is not sufficient. However, since the position and inclination of the stepper bracket 36 are determined based on the guide shaft reference and the spindle center reference by the above-described mounting method, the stepper can be accurately positioned, and 0TK (track),
Alignment adjustment is easy. In addition, the boss 1 having the stepper bracket 36 provided on the chassis 76 as in the prior art.
02, the jig 3 is attached to the portion of the chassis 4 where the stepper bracket 36 is mounted.
Since it is sufficient to provide the rough hole 37 through which the zero pin 35 is inserted, it is not necessary to increase the dimensional accuracy of the stepper bracket mounting portion of the chassis 4 and the manufacturing cost can be reduced.

According to the above-described embodiment, the ribs 82 are formed within the thickness of the chassis 4 by being formed of the inclined portion 83 and the flat portion 84 at the top of the inclined portion 83, and Since the flat surface 84a on the outer surface side of the portion 84 is formed larger than the flat surface 84b on the inner surface side of the flat portion 84, the rib 82 having a small height and width can increase the section modulus, improve the bending rigidity, and reduce the thickness. The weight can be reduced.

In addition, according to the above-described embodiment, the mounting position of the stepper is determined by the boss 102 of the chassis 76, the holes of both the chassis 4 and the stepper bracket 36 are formed, and the pins 31 and 3 of the jig 30 are positioned with respect to the center of the spindle.
Positioning can be performed at 2,35. By the way, conventionally, since the position is determined by the component size of the chassis 76, errors cannot be completely absorbed or accumulated, and the position accuracy is not sufficient. However, since the position and inclination of the stepper bracket 36 are determined based on the guide shaft reference and the spindle center reference by the above-described mounting method, the stepper can be accurately positioned, and 0TK (track) and alignment adjustment are easy. . Further, since a rough hole 37 through which the pin 35 of the jig 30 is inserted may be provided in a portion of the chassis 4 to which the stepper bracket 36 is attached, the dimensional accuracy of the chassis 4 becomes rough, and the manufacturing cost can be reduced.

According to the above embodiment, since the stopper 73 is formed by forming the concave step 72,
The shapes of the chassis 4 and the shaft holding plate 74 are simplified, and the processing cost can be reduced. Also, the guide shaft 17
The guide shaft 17
Can be fixed, the space can be reduced, and the thickness can be reduced.

Further, according to the above-described embodiment, when the hold case 89 is incorporated into the carriage 85, the load spring 90 is in the way.
1 is provided and the load spring 90 is retracted to prevent damage to the bearing portion 88.

According to the above embodiment, the carriage 8
5 is provided with a projection 93 so that the hinge 92 does not come off, so that when the hold case 89 is assembled, it can be incorporated without interfering with the load spring 90. There is no risk of deviating from 85. By providing the stopper 93 with the inclined portion 94, the hinge 92 is provided.
Was made easier to incorporate.

According to the above-described embodiment, the conventional reinforcing plate is also formed integrally with the hinge 63, and the hinge 63 is bent at the bending line portion 97, and the carriage 85 is tightened with the fastening screw.
Attach and fix to. In this manner, the rigidity of the adjusting portion of the hinge 63 is improved without reducing the reinforcing plate to the hinge 63 by caulking or spot welding as in the related art, thereby enabling cost reduction.

[0031]

According to the present invention, as described above, according to the present invention, the rib is formed of an inclined portion and a flat portion at the top of the inclined surface by deforming the rib within the thickness of the chassis.
Since the flat surface on the outer surface side of the flat portion is formed larger than the flat surface on the inner surface side of the flat portion, the ribs can be increased in section modulus with small ribs both in height and width, thereby improving bending rigidity, and reducing thickness and weight. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a disk drive according to an embodiment of the present invention.

FIG. 2 is a plan view showing a cartridge holder and the like of the disk drive device according to the embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a longitudinal sectional view of a reinforcing rib of a chassis of the disk drive device according to the embodiment of the present invention;

FIG. 5 is an exploded perspective view of the stepper holder of the disk drive device according to the embodiment of the present invention;

FIG. 6 is a plan view showing a stepper mounted state of the disk drive device according to the embodiment of the present invention;

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is an explanatory diagram showing a method of attaching a stepper.

FIG. 9 is a perspective view of a carriage device of the disk drive device according to the embodiment of the present invention;

FIG. 10 is a plan view and a side view of the carriage device of the disk drive device according to the embodiment of the present invention.

11 (a) and 11 (b) are plan views showing a deployed state and a folded state of the hinge of the disk drive device according to one embodiment of the present invention, and FIG. 11 (c) is a view showing FIG.
It is sectional drawing along the BB line of (b).

FIG. 12 is a perspective view of a main part of a conventional hinge shown for comparison with FIG.

FIG. 13 is a perspective view and a longitudinal sectional view showing a mounting state of the guide shaft.

FIG. 14 is a perspective view of a conventional guide shaft mounted state shown for comparison with FIG.

FIG. 15 is a bottom view of the disk cartridge used in the disk drive according to the embodiment of the present invention;

FIG. 16 is an exploded perspective view of a stepper holder of the conventional disk drive shown in FIG. 6 for comparison.

FIG. 17 is an explanatory view showing ribs of a chassis of a conventional disk drive device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disk drive 3 Spindle motor 4 Chassis 5 Lower magnetic head 6 Upper magnetic head 7 Carriage 8 Magnetic disk 9 Carriage transfer device 10 Disk cartridge 11 Cartridge holder 82 Rib 83 Inclined part 84 Flat part 84a, 84b Flat surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A turntable for loading and rotating an information recording disk, a carriage conveyed in a direction intersecting a rotation direction of the information recording disk, and one end supported by the carriage to be rotatable. Hold case,
A chassis provided with an upper head provided on a surface facing the carriage at a front end of the hold case, and a lower head provided on the carriage facing the upper head; and mounting these components. However, in this disk drive device in which a rib for reinforcement is formed on the chassis,
The rib comprises an inclined portion deformed within the thickness of the chassis and a flat portion at the top of the inclined portion, and a flat surface on an outer surface side of the flat portion is a flat surface on an inner surface side of the flat portion. A disk drive device characterized by being formed larger.