JPH0479092A - Disk device - Google Patents

Abstract

PURPOSE:To reduce the overall thickness and to reduce the size by forming a recessed part in the reverse surface of a cover by press machining and reduce the thickness. CONSTITUTION:The cover 12 is fitted covering the upper opening part of a box-shaped base 10 where respective components are mounted, and functions as a magnetic shield and a dust-protection cover. Small holes 81 and groove holes 82 for deformation absorption are formed in a desired area of this cover 12 in a specific distribution state and the recessed part 84 for reducing the thickness of the cover is formed by press machining within a specific range 83 including some of the small holes 81 and groove holes 82. In this case, the range 83 wherein the thickness is reduced is selected corresponding to a head unit 32, etc., which has maximum height among the respective components in the base 10. Consequently, an increase in the thickness of the whole device by the cover can be suppressed as much as possible. Therefore, the overall thickness is reduced to make the device thin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc device that performs recording on or reproduction from a disc, and more particularly relates to the structure of a cover attached to the open top surface of the disc device.

[Conventional technology]

The above-mentioned disk device is a device that records or reproduces information on a disk-shaped recording medium such as a magnetic disk or a laser disk.A disk serving as the recording medium is inserted and ejected, and is driven by a motor. It is configured to perform recording or reproduction while rotating the disk and moving the head in contact with or close to the disk.

In this case, the head is mounted on a carriage and moved (seek) along the radial direction of the disk by a motor.

The disk device includes an insertion/ejection means for mounting and ejecting a disk on a base that supports each component;
A disk rotation driving means for rotating the disk by a motor, a head seeking means for moving the head to an arbitrary track position along the radial direction of the disk, a hendo loading means for loading and unloading the head with respect to the disk, etc. It is provided.

Further, a control circuit for controlling the entire disk device, a power supply connector, etc. are provided, and the control circuit is connected to a host device etc. via an interface.

Such a disk device is used as an external storage device for electronic equipment such as a personal computer or a word processor, and although it may be configured as an independent device, it is generally incorporated into the main body of the electronic equipment in many cases.

Furthermore, as electronic devices become smaller and more portable, there is a strong demand for the disk devices to be smaller, lighter, and thinner.

The insertion/ejection means for loading and ejecting a disk includes a cassette guide having a guiding function for inserting, ejecting, loading, and unloading the disk cassette, and a slide plate having a cam portion for raising and lowering the cassette guide. It is configured.

In addition, the above-mentioned loading means for loading and unloading the head with respect to the disk includes an arm for holding the head attached to a fulcrum provided on the head seek carriage so as to be rotatable in the vertical direction, and a spring for loading the head. The arm is biased (loaded) toward the disk, and the arm is rotated upward (unloaded) by utilizing the rise of the cassette guide.

Incidentally, a cover made of a non-magnetic material such as aluminum is attached to the upper end surface of the base in which each component is housed for the purpose of magnetic shielding and dustproofing.

Further, the height (thickness) of the base needs to be large enough to accommodate bulky components such as the head loading means that moves up and down or a stepping motor.

[Technical Problem to be Solved by the Invention] However, in conventional disk devices, a plate-like cover of uniform thickness is mounted on the base of a required thickness, so that the plate thickness of the cover cannot be measured. An increase in the thickness of the device was unavoidable, and it was almost impossible to further reduce the overall thickness of the device.

The present invention has been made in view of such technical problems, and it is possible to suppress the increase in the thickness of the entire device due to the cover as much as possible, thereby reducing the overall thickness (overall height) and making it thinner. The purpose of this invention is to provide a disk device that can be used to

[Means for solving problems]

The present invention provides a disk device that performs recording or playback on a disk by rotating the disk as a recording medium and moving a head in a predetermined direction, in which components are mounted in a box-shaped base with an open top. At the same time, a cover member is attached to the upper end of the base, holes or recesses are formed in a predetermined distribution in the cover member, and recesses are formed in a predetermined range on the back surface of the cover by press working to reduce the wall thickness. By adopting a structure in which the cover is reduced, an increase in the thickness of the entire device due to the cover can be suppressed as much as possible, and the overall thickness (total height) can be reduced accordingly to provide a disk device that can be made thinner. be.

〔Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

In addition, in each of the following drawings, all the same reference numerals indicate the same or corresponding parts.

First, with reference to FIGS. 1 to 17, the overall structure of an example of a disk device suitable for applying the present invention will be described.

Fig. 1 is a plan view of the disk device, Fig. 2 is a right side view taken from line ■-■ in Fig. 1, and Fig. 3 is a front view taken from line ■-■ in Fig. 1. It is a diagram.

In FIGS. 1 to 3, each component is housed in a box-shaped base 10 with an open top.
A cover 12 is attached to the top surface of 0.

Furthermore, a front panel 16 is attached to the front surface of the base 10, in which a cassette insertion opening 15 into which a disk cassette 14 is inserted and ejected is formed.

The base 10 is formed of a thin and small casing made of metal such as aluminum, and the cover 12 is for magnetic shielding and dustproofing, and is made of a thin non-magnetic material such as aluminum. It is formed from a plate-shaped member.

Incidentally, protrusions 17 are formed at the front and back on both sides of the base 10, and notches 18 are formed at the front and back on both sides of the cover 12, and the cover 12 has each protrusion 17 engaged with each notch 18. Positioning is fixed.

FIG. 4 is a plan view of the disk device of FIG. 1 with the cover removed.

In FIG. 4, inside the base 10, the insertion and ejection of the disk cassette 14 into the device and the loading of the disk into the device are carried out.
A cassette guide 20 for guiding unloading is attached to the cough base 10 so as to be movable up and down.

FIG. 5 is a cross-sectional view of the base 10 and the cassette guide 20 taken along the line V--■ in FIG. 4, and FIG. 6 is a partial side view taken along the line V--■ in FIG. It is.

In FIGS. 4 to 6, the cassette guide 20 has a shape that guides and holds the disk cassette 14, and guide pins 21 are provided on both sides thereof.

On the other hand, vertical grooves 22 are formed on both sides of the base 10, into which the guide pins 21 of the cassette guide 20 are slidably fitted.
It is mounted so that it can move within a predetermined range in the vertical direction along the .

A disk (magnetic disk, etc.) as a recording medium is housed inside the disk cassette 14 so as to be accessible from the outside.

Figure 7 shows the cassette guide 2 from the disk device in Figure 4.
It is a top view which shows the state which removed 0.

In FIG. 7, a cam portion is formed on the lower side of the cassette guide 20 to regulate the left-right position of the cassette guide and to raise and lower the cassette guide.
A slide plate 23 having a rising portion 27 is attached.

The slide plate 23 is mounted inside the base 10 so as to be slidable within a predetermined range in the front and rear directions.

A disk-shaped disk drive motor 24, which will be described later, is mounted approximately at the center of the bottom surface of the base 10, and the slide plate 23 is attached to the disk drive motor 24, which will be described later.
It has a shape with a notch in the center so as to avoid 4.

Further, the slide plate 23 has its lower surface supported by a plurality of (for example, four) protrusions (not shown) formed on the base 10, and further has long projections (not shown) formed on the left and right sides of the slide plate. hole 29, base lO
By engaging with the single-headed pin 30 fixed to the
(sliding) possible.

The slide plate 23 is moved forward (front panel 1) by a tension spring 25 stretched between the slide plate 23 and the base 10.
6) is always energized.

On the other hand, the slide plate 23 can be engaged with a latch member 26, which will be described later, and in the engaged (latched) state is held at the rear position (the position shown in FIG. 7) against the tension spring 25. .

As shown in FIGS. 4 and 7, the cassette 7
) A rising portion 27 is formed for regulating the left-right position of the guide 20.

Each rising portion 27 has a cam portion (cam groove) 65 (a cam groove) having a function of raising and lowering the cassette guide 20 and determining the forward position of the slide plate 23 according to the vertical position of the cassette guide (a kind of stopper). 13
14) are formed.

The lowering position of the cassette guide 20 is regulated by the height of the disk (specifically, the boss portion thereof) magnetically attracted to the rotor of the disk drive motor 24.

Front and rear of both sides of this cassette guide 20 (4 locations in total)
, each of the cam portions (cam grooves) of the slide plate 23
A cam pin 28 (FIG. 4) is provided which engages 65.

In this way, when the slide plate 23 is in the rear position due to the engagement between the cam portion 65 and the cam pin 28,
The cassette guide 20 is held in the raised position (Fig. 13).
, When the latch member 26 is released and the slide plate is moved forward by the tension spring 25, the cassette guide 20 is lowered to the disk mounting position (14th time).
It is configured as follows.

When ejecting the disk cassette 14 set in the disk device, push the eject button 31 attached to the slide plate 23 from above the front panel 16, move the slide plate to the rear position, and release the launch member. 26 is rotated back by the spring force, and the disk cassette 14 is ejected forward by the rotational force.

4 and 7, a head seek means (head moving means) 33 is provided within the base 10. As shown in FIG.

This head seek means 33 is for moving a head unit 32 (FIG. 4) having a recording/reproducing head to an arbitrary trunk position along the radial direction of the disk positioned and mounted on the drive motor 24. This is the mechanism.

Note that a loading means for loading and unloading the head onto and from the disk is provided in the loading unit 32, as will be described later.

Therefore, the head seek means 33 includes a motor (for example, a stepping motor) 34 as a driving source, a screw shaft 35 for converting the rotation of the motor into radial movement of the head unit 32, and a radial movement of the head unit 32. a guide bar 36 for accurately guiding the
Each of these components is based on base 1.
0 at a predetermined position.

FIG. 8 is a partial plan view showing the main part before the disk cassette is installed (latch member engaged state - latch shape MM), and FIG.
The figure is a plan view showing the same portion as FIG. 8 when the disk cassette is attached (latch member released state=latch released), and FIG. 10 is a side view of FIG. 9.

Next, referring to FIGS. 8 to 10, slide plate 2
3 and the operations of the latch member 26 will be described in detail.

The latch member 26 is rotatably mounted around a vertical pin 41 provided on the base 10, and is rotated counterclockwise in FIG. 8 by an ejector spring 42 engaged with the latch member and the base. It is constantly biased in the direction.

This latch member 26 includes an arcuate engagement edge 43 and a slide edge (
or a stopper edge) 44 is formed.

In the launch state shown in FIG. 8, a retaining portion (falling portion) 45 formed on the slide plate 23 is engaged with the engagement edge 43, and the slide plate is held in the rear position against the tension spring 25. has been done.

The latch member 26 also includes a disk cassette 14.
A push-out arm 46 is provided which abuts the front end of the.

The pushing arm 46 functions as an ejector that pushes out the disk cassette 14 when ejecting the cassette, but when inserting the cassette, it functions as a cassette opening member that opens the shutter 47 of the disk cassette 14, as shown in FIG. It is something.

When the disk cassette 14 is inserted (in the direction of arrow B) in the latched state shown in FIG. 8, the front end of the cassette comes into contact with the push-out arm 46, and the pushing of the cassette causes the launch member 26 to rotate in the direction of the arrow B. , when reaching the final position, the engaging edge 43 separates from the engaging portion 45 of the slide plate 23 and becomes unlatched, and the slide plate 23 is moved in the direction of arrow C by the tension spring 25, as shown in FIG. The cassette is attached (latch released).

At this time, the launch member 26 is held in the position shown in FIG. 9 by the contact between the retaining portion 45 of the slide plate 23 and the slide edge 44 (rotation direction stopper), and in this state, the latch member 26 is held in the position shown in FIG. By the push-out arm 46,
The shutter 47 of the disk cassette 14 is opened to the left in FIG. 8 against the spring force, and the disk cassette is in an open state (recordable/reproducible state IL!i).

On the other hand, when ejecting the disk cassette 14, press the eject button 31 (FIG. 7) and push the slide plate 23 in the direction of the arrow (FIG. 9). , the latch member 26 is rotated in the direction of arrow E (FIG. 9) by the ejector spring 42, and the ejector arm 4
The disk cassette 14 that is in contact with the disk cassette 6 is ejected forward by the rotating force at that time.

FIG. 11 is a plan view of the motor 24 for rotationally driving the disk (recording medium) in the disk cassette 14, and FIG. 12 is a longitudinal sectional view taken along the line X--X in FIG. be.

As the motor 24 for driving the disk, a flat motor having a rotor with the same circumference and an outer circumference is used.
The motor is mounted on the base 10.

11 and 12, '51 is the base 10
A stator yoke is fixed to the stator yoke with screws 52, and fixed side components such as a bearing housing 55 holding bearings 53 and 54, a stator 56, and a coil 57 are mounted on the stator yoke.

A spindle shaft 58 is pivotally supported by the bearings 53 and 54, and a disk-shaped outer peripheral rotor 60, an adsorption magnet 61 for adsorbing a disk on the rotor, and an adsorption magnet on the adsorption magnet are attached to the spindle shaft through a flange 59. Rotation-side components such as a disk drive bin 62 and a drive magnet 63 fixed to the inner surface of the rotor 60 so as to face the stator 56 are attached.

The base 10 also includes rotor removal stop portions 37 and 38 for preventing the rotor 60 from moving upward.
．． 39 is formed by cutting and raising a part of the base.

When the disk cassette 14 is installed, a magnetic body (not shown) provided at the center of the disk is magnetically attracted to the attraction magnet 61, and a retaining hole (not shown) of the disk is aligned with the drive pin. By being fitted into the rotor 62, the disk (recording medium) is accurately positioned and attached to the rotor 60.

FIG. 13 and FIG. 14 are side views showing the operation of the cassette guide 20, and FIG. indicates that the cassette guide is lowered (when a disc cassette is installed).

In FIGS. 13 and 14, the slide plate 2
A groove-shaped cam portion 65 is formed in each of the rising portions 27 provided on both sides of the cam portion 3 .

As shown in the figure, each cam groove 65 is composed of a horizontal groove on the front side (front panel side) and an inclined groove inclined rearward and downward from the horizontal groove.

Each cam groove 65 has a cassette guide 20 as described above.
The cam pins provided on both sides of the cam pin 2 are engaged.

The guide bins 21 provided at the center on both sides of the cassette guide 20 are engaged with the vertical grooves 22 (indicated by two-dot chain lines) of a predetermined length formed on both sides of the base 10. The cassette guide 20 moves only in the vertical direction (
It is installed so that it can be moved up and down.

Therefore, in the state shown in FIG. 13, the front panel 16
When the disk cassette 14 is inserted into the cassette insertion slot 15 and pushed all the way in, the latch member 26 is rotated by the tip of the cassette, as explained in FIGS. 8 and 9, and the slide plate 23 is rotated. The engaging portion 45 separates from the engaging edge 43, and the slide plate engages the tension spring 2.
5 in the direction of arrow C (direction toward the front panel 16).

Therefore, each of the cam bins (4 locations in total) is moved downward by each cam groove (cam portion) 65, and the cassette guide 20 is lowered to the cassette mounting position shown in FIG.

In this case, the lowering position of the cassette guide 20 is regulated,
In addition, since each cam groove 65 is engaged with each cam bin 28, the slide plate 23 is at the front stop position (the 14th
) is determined by the shape of the cam portion 65.

Note that reference numerals 66 in FIGS. 13 and 14 indicate protrusions for supporting the slide plate 23 provided at a plurality of locations on the base 10.

FIG. 15 is a side view showing the structure of the head unit 32 (FIG. 4).

In FIG. 15, the head unit 32 has a structure in which each component is mounted on a carriage 68.

Also attached to the carriage 78 are an upper head 69 for recording and reproducing information on the upper track of the disk, and a lower head 70 for recording and reproducing information on the lower surface track of the disk.

The head unit 32 (or carriage 68) has a shape having a predetermined length in the radial direction, as shown, so that each head 69, 70 can record and reproduce each track.

Therefore, the lower head 70 is attached to the leading end of the carriage 68.

On the other hand, the upper head 69 is attached to the carriage 68 so as to be movable up and down.

In the illustrated example, an arm 72 is attached to the carriage 68 via a leaf spring 71 so as to be movable up and down, and an upper head 69 is attached to the tip of the arm.

The upper head 69 and the lower head 70 are mounted at positions facing each other.

The leaf spring 71 and the support member 73 are fixed to the carriage 68 by screws 74 .

The support member 73 includes a head for biasing the arm 72 toward the disk to put the head 69 in a loaded state (a state D in which it contacts or approaches the disk and is capable of recording or reproducing). Loading hooks 75 are attached.

A head 69 indicated by a two-dot chain line indicates a loaded state of the head.

Further, on the side surface (one side or both sides) of the arm 72,
A projecting portion (lifting point) 76 is formed for lifting (unloading) the arm by utilizing the lifting of the cassette guide 20.

Note that the two-dot chain lines 14A and 14B in FIG. 15 indicate the relative positions of the disk cassette 14 in the radial inner and outer positions of the head unit 32.

Further, a two-dot chain line 24A indicates the relative position of the disk drive motor 24 when the head unit 32 moves to the innermost position.

By moving the carriage 68 in the radial direction by the motor 34, the head unit 32 performs a radial seek operation.

16 is a partial plan view showing the relationship between the head unit 32 with the arm 72 and upper head 69 etc. removed in FIG. 15 and the helad seek means, and FIG. -X■ is a cross-sectional view along the line.

16 and 17, a head seek motor (for example, a stepping motor) 34 is attached to the rear wall portion 10A of the base 10, and both ends of a screw shaft 35, which is an output shaft thereof, Rear wall part 1
It is rotatably supported by the 0A and the rising portion 10B.

Also, seek (
Both ends of the guide bar 36, which guides the radial movement (radial direction movement), are supported in parallel to the radial direction by the rear wall portion 10A of the base 10 and another upright portion IOC.

Therefore, a plate spring 78 is attached to the lower surface of the overhanging portion 77 of the carriage 68 and is pressed against the screw shaft 35, and the carriage has a screw groove extending laterally and forming a screw groove on the lower side of the screw shaft 35. A needle pin 79 that engages with is fixed.

Therefore, when the screw shaft 35 is rotated by the motor 34, the head unit 32 (carriage 68) moves in the radial direction of the disk via the needle bin 79, and a seek operation is performed to align the head 69, 79 with an arbitrary track. It is done.

Furthermore, bearing portions 80 that are slidably fitted to the guide bar 36 are provided at three locations on the opposite side of the carriage 68;
The head unit 32 is configured to be able to accurately guide the head unit 32 during the seek operation.

Note that the head unit 32 shown by the solid line in FIG.
The heads 69 and 70 are shown in the innermost track position, and the dashed double-dashed line 32 in FIG. 16 shows the head unit 32 when the head is in the outermost track position.

FIG. 18 is a partial plan view showing the main structure of an embodiment of a disk device according to the present invention, FIG. 19 is a longitudinal sectional view taken along line XIX-XIX in FIG. 18, and FIG. is a partially enlarged longitudinal sectional view taken along line xx-xx in FIG. 18.

18 to 20, the cover 12 is attached to the upper end of the box-shaped base 10 to cover the open upper end of the box-shaped base 10 on which each component is mounted, as described above, and is magnetically shielded. It also functions as a dustproof cover, and is made of a thin plate-like non-magnetic material (for example, aluminum).

Small holes 81 and slots 82 for absorbing deformation are formed in desired areas of the cover 12 in a predetermined distribution.

In the illustrated example, a large number of small holes 8 are formed in a rectangular area.
A plurality of slot holes 82 are formed around 1.

In this embodiment, each of the small holes 81 and each of the slots 82 are formed as through holes, but these may be formed as long as they are hollow enough to absorb distortion and deformation due to press working, which will be described later. It is also possible to form it as a concave recess.

Therefore, a predetermined area 83 including a part of the small hole 81 and the slot 82 on the back surface (lower surface) of the cover 12 is formed with a recess 84 (
Fig. 20) is formed.

In the illustrated example, the range 83 of the recess 84 corresponds to the small hole 8
1 and the distribution area of the slot 82.

In this case, since the small hole 81 and the slot 82 are formed in the area where the wall thickness of the cover 12 is to be reduced, even when the wall thickness is reduced by press working, the material in the area can be easily dispersed around the area. be able to.

Therefore, it becomes possible to manufacture the cover 12 having the thin area in a simple process and with high precision.

Furthermore, in this embodiment, among the components installed in the base 10, the height of the head unit 32 when the head is raised is the maximum height, so the range 83 where the wall thickness is reduced is as follows: The range is set to include the movement (seek) range of the head unit 32.

If other components of the base 10 are higher, for example, if the head seek motor 34 is higher, or if it is the same height as the head uni-soto 32, the The range 83 in which the thickness is reduced is set to a predetermined range corresponding to the position of the motor 34 or to a range corresponding to both the head unit 32 and the motor 34.

The thickness of the recess 84 within the range 83 is, for example,
If the thickness of 2 itself is 0.51, approximately 0°35 to 0.25
It can be set to a certain degree.

In the illustrated example, a dustproof film 85 that covers the area where the holes (small holes 81 and slots 82) are formed is fixed to the surface (upper surface) of the cover 12 by adhesive or the like.

For example, the dustproof film 85 has a thickness of about 25 mm.
A plastic film on the order of μm can be used.

However, depending on the case, this dustproof film 85 can be omitted.

As described above, in the disk device of the present invention, that is, in the disk device that performs recording or reproduction on the disk by rotating the disk as a recording medium and moving the Hendro 9 in a predetermined direction, the box shape with an open top end is used. The components are mounted in the base 10 and the cover member 12 is mounted on the upper end of the base, holes 81, 82 or recesses are formed in a predetermined distribution in the cover member, and the holes 81, 82 or recesses are formed in a predetermined distribution by pressing. A disk device is configured in which a recess 84 is formed in a predetermined range 83 on the back surface of the cover to reduce the wall thickness.

In this case, the range 83 where the wall thickness is reduced is the base 1
The range is selected to correspond to the component with the maximum height among the components in 0 (for example, the head unit 32, the head seek motor 34, etc.).

According to the embodiment described above, in the range corresponding to the component having the maximum height within the base 10, the cover 12
Since the recess 84 is formed on the back surface of the recess, the thickness of the recess ff
The distance between the component and the cover 12 increases by K, and therefore the height of the base 10 (
Thus, a disk device that can be made thinner and lighter by reducing the thickness of the device has been obtained.

Moreover, since the thinned portions such as the small hole 81 and the slot 82 are formed in advance in the area 83 where the wall thickness of the cover 12 is reduced, even if the recessed portion 84 is formed by press working, the recessed portion Therefore, the material of the cover 12 having a thin wall portion can be easily dispersed around the surrounding area, without deteriorating the flatness in the desired area or other areas, and in an extremely simple process. It has become possible to manufacture with precision.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, in a disk device that performs recording or reproduction on a disk by rotating the disk as a recording medium and moving the head in a predetermined direction, the top end is open. The components are mounted in a box-shaped base, and a cover member is mounted on the upper end of the base, holes or recesses are formed in a predetermined distribution in the cover member, and
Since the configuration is such that a recess is formed in a predetermined range on the back surface of the cover by press working to reduce the wall thickness, the increase in the thickness of the entire device due to the cover can be suppressed as much as possible, and the overall thickness ( Provided is a disk device that can be made thinner by reducing its overall height.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a disk device suitable for applying the present invention, FIG. 2 is a side view taken from the line ■-■ in FIG. 1, and FIG. 3 is a side view taken from the line ■-■ in FIG. 4 is a plan view of the disk drive shown in FIG. 1 with the cover removed; FIG. 5 is a cross-sectional view taken along the line V-■ in FIG. 4; and FIG. Figure 4 is a partial side view taken from line ■-■ in Figure 4, Figure 7 is a plan view of the disk device in Figure 4 with the cassette guide removed, Figure 8 is a portion showing the latched state of the seventh launch member. 9 is a partial plan view showing the latch member in FIG. 8 in the unlatched state, FIG. 10 is a side view taken from line X-X in FIG. 9, and FIG. 11 is in FIG. 7. 12 is a longitudinal sectional view taken along the line xn-xn in FIG. 11, FIG. 13 is a side view showing the cassette guide in FIG. 4 when it is raised, and FIG. 14 is a plan view of the disk rotation drive motor. is a side view showing the state in which the cassette guide is lowered from FIG. 13, FIG. 15 is a side view of the head unit in FIG. 4, and FIG. 16 is a side view of the head unit in FIG. 4 and the head unit unit in FIG. FIG. 17 is a cross-sectional view taken along the line X--X in FIG. The plan view, Figure 19 is a vertical sectional view taken along *XIX-XIX in Figure 18, and Figure 20 is the
FIG. 3 is a partially enlarged vertical cross-sectional view taken along line xx-xx in the figure. Below, symbols representing main components in the drawings are listed. 10--Base, 12-----One cover, 14
Displacement center, 16--front panel, 20 cassette guide, 23-11--slide plate, 2
4---Disc rotation drive motor, 26 latch member, 28.65-1 cam mechanism, 32 hentunisoto, 33
-1---Head seek means, 34--Head seek motor, 35--11-Screw shaft,
36--Guide bar, 42--Ejector spring, 68--1111 Head carriage nozzle, 69.
70----1-head, 71--plate spring (elastic member or elastic part), 72-----arm, 8 L-
---One small hole, 82-----Slot hole, 83---One area for reducing wall thickness, 84-----One recess (cover), 85--One------ Dustproof film. Fourth

Claims (2)

[Claims] (1) In a disk device that performs recording or playback on a disk by rotating the disk as a recording medium and moving the head in a predetermined direction, components are mounted in a box-shaped base with an open top. At the same time, a cover member is attached to the upper end of the base, holes or recesses are formed in a predetermined distribution in the cover member, and recesses are formed in a predetermined range on the back surface of the cover by press working to reduce the wall thickness. A disk device characterized by: (2) The disk device according to claim 1, wherein the range in which the wall thickness is reduced corresponds to the position of the head.